Question about 2005 Chevrolet Impala

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2005 IMPALA 3800 P0102 IGN AND GROUND GOOD SIGNAL WIRE AND HZ READING GOOD REPLACED WITH AFTER MARKET MAF ARE AFTEER NARKET MAF SENSOR NO GOOD

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 98 Answers

SOURCE: 2005 Chevy Impala wont start

The most common cause of this problem on the Impalas is their @$!@ security system called Passlock or Passlock II. It is very sensitive and senses an intrusion a lot of times even when there is not one. When it does it locks down the fuel injectors. You can leave the key in the ignition in the on position and wait 10 minutes for it to re-set but it tends to do this 4-5 times a month at a minimum. The way to permanently solve this is to disable this portion of the system.
You will need to take the dash off ( it is not as hard as it seems) It is held in place with a variety of bolts, screws, and clips. You can do a web search for dash removal to try and find the exact configuration. Once the dash is out under the steering column there is a metal plate. It needs to come out also (held in place by a few bolts. Once this is removed you will have clear access to the underneath part of the steering column. Coming up the steering column you will see (3) wires grouped together. (Yellow, Black, and White). They will either be tied or taped together. The only one you need to concern yourself with is the yellow one. This is the most important step. (1) Start the car! (2) While the car is started snip the yellow wire, making sure it does not contact any metal. (3) using electrical tape or something similar cap off the ends and tie it off if you wish. (4) Turn off the car, put the plate back on, the dash back together and problem solved!. The yellow or orange security light will stay permanently illuminated, but it is not a problem. I did this on my Impala which I inherited 10 months ago and have never had this problem again. You can take the bulb out of the instrument cluster to for the security light but it is a lot of trouble and not worth the effort. Hope this helps..

Posted on Feb 15, 2009

  • 23 Answers

SOURCE: no start, no spark, no signal to the coil

there is a fuse that works the battery try checking if it is still good

Posted on Mar 03, 2009

  • 1 Answer

SOURCE: 1998 chevy lumina pcm ign fuse keeps blowing

Update: I took the car to a mechanic that specializes in auto electrics and he found that the wire that goes to the back oxygen sensor had chaffed through over the transmission and was shorting out and blowing the fuse. He repaired it and the car runs beautifully.

Posted on May 03, 2009

Mackmech11
  • 122 Answers

SOURCE: I would like to know the Location of the P0036 on

P0036....HO2S Heater Control Circuit (Bank 1 Sensor 2)
location is Bank 1 is on the side of number 1 cylinder. Sensor 1 is on the exhaust manifold. i would change the oxygen sensor on the exhaust manifold i believe thats the one closes to the front of the car with the hood up. good luck

Posted on Apr 16, 2010

  • 1757 Answers

SOURCE: firing order for plugs and wires....on a v6 3800 2000 impala

For the 2000 Chevrolet Impala 3.8L V6:

Firing Order:
1-6-5-4-3-2

Cylinders:
.....(back).....
|...2...4...6...|
___________
|...1...3...5...|
.....(front)

Ignition Coil Connections:
(back)
o <---6
___
o <---3
o <---2
___
o <---5
o <---4
___
o <---1
(front)

Let me know if this helped, or if you have additional information or questions. Feel free to contact me at FixYa.com!

Posted on Apr 22, 2010

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97' mitsubishi diamante code P0102


code p0102 refers to mass air flow(MAF) sensor/ volume (VAF)sensor --low input==== causes --wiring short to ground---MAF/VAF sensor---ECM
replace the MAF or VAF sensor.

Feb 14, 2014 | 2007 Lincoln Town Car Signature Limited...

1 Answer

2000 nissan sentra 2.0 error codes p0101& p0102


P0102 - Mass Air Flow Sensor Circuit Malfunction

The mass air flownissan-maxima-maf-sensor.jpg or MAF sensor is placed in the intake air duct between the air filter and the engine intake manifold. The MAF sensor measures the amount of intake air flow. The MAF sensor converts the air flow measurement into a voltage or frequency signal, with the voltage or frequency changing proportionally to the amount of air flow. The air flow sensor signal is monitored by the engine computer (ECM). The engine computer (ECM) uses the mass air flow signal to know the engine load and to calculate the proper amount of fuel injected. If the signal from the mass air flow sensor is out of expected range, the ECM detects a fault and sets the code P0100. For example, the mass air flow sensor signal could be higher than expected when the engine is not running or lower than expected with the engine running. A car with the code P0100 may have some driveability issues, such as stalling, lack of power, surging, hesitation, etc. In some cars, the code P0100 can cause the fail-safe mode where the engine speed would be limited to 2,500 - 3,000 rpm.
If there are other trouble codes present, they might need to be looked at first. Checking the freeze frame may help, as it may contain some important information. The freeze frame is a snapshot of the engine parameters at the moment when the fault was detected. The freeze-frame may show whether the vehicle was running or stopped, whether the air-fuel ratio was lean or rich, was the engine was cold or warmed up at the time of the malfunction. Read more about the freeze frame.


Read more about mass air flow sensor.

What could cause the code P0100:
- faulty or contaminated mass air flow sensor
- open or short in the mass air flow sensor electrical circuit
- open or short in the sensor power or ground circuit

- other electrical problem with the MAF sensor wiring, (corroded wires, bent terminals, bad ground connection, burned fuse, etc.
- vacuum leaks
- restricted air flow at or before the air filter
- wrong air flow sensor installed
- problem with ECM





P0102 - Mass Air Flow Sensor Circuit Low

The mass air flow or MAF sensor measures the amount of air entering the engine. The engine computer (ECM) uses the mass air flow signal to calculate the amount of fuel injected (read more how the MAF sensor works below). The code P0102 is set when the signal from the mass air flow sensor is lower than expected. Often a car may exhibit some driveability symptoms, such as lack of power, surging, hesitation on acceleration, hard starting, pinging (detonation), or rough idle when started cold. Often the codes P0171 or P0174 could also be stored along with the code P0102, as the incorrect air flow signal can cause the engine to run lean. The codes P0171 and P0174 indicate a lean condition. Checking the freeze frame might help in the diagnostic process. The freeze frame is stored in the ECM along with the trouble code. The freeze frame contains some recorded parameters (e.g. vehicle speed, engine temperature, fuel trim) at the moment when the fault was detected. The freeze frame can also be accessed with a scan tool.



What could cause the code P0102
- faulty or contaminated mass airflow sensor
- debris blocking the air flow at the mass air flow sensor
- unmetered air leaking past the MAF sensor (vacuum leaks)
- PCV system vacuum leaks
- restricted or collapsed intake air duct
- dirty or restricted air filter
- restricted air screen before the air filter
- improper application of aftermarket components (e.g. cold intake, modified air filter, etc.)
- wrong air flow sensor installed
- electrical problem with the MAF sensor wiring, connector, power supply or ground.
- problem with ECM
- in some cases other issues with the fuel injection system like a clogged catalytic converter or a faulty manifold absolute pressure sensor (MAP) can also cause the code P0102.




Solution for MAF repair

Oct 20, 2012 | 2006 Kia Sorento

1 Answer

2003 Grand Am Has P0102


It is not an ECM/PCM problem.
P0102 - Mass or Volume Air Flow Circuit Low Input
Possible causes- Faulty mass air flow sensor
- Dirty mass air flow sensor
- Dirty air filter
- Mass air flow sensor harness is open or shorted
- Mass air flow sensor electrical circuit poor connection
- Intake air leaks Tech notes Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor

Sep 27, 2012 | 2003 Pontiac Grand Am

1 Answer

Transmission in failsafe code p0108andp0104andp0102andp0101andp0110


P0108 - (Manifold Absolute Pressure/Barometric Pressure Circuit High Input
The MAP (Manifold Absolute Pressure) sensor measures engine manifold negative air pressure. It's usually a three wire sensor: a ground wire, a 5 volt reference wire from the PCM (Powertrain Control Module) to the MAP sensor, and a signal wire that informs the PCM of the MAP sensor voltage reading as it changes. The higher the engine vacuum, the lower the voltage reading. The voltage should range between about 1 volt (at idle) to about 5 volts (WOT wide open throttle).

If the PCM sees the voltage reading from the MAP sensor is greater than 5 Volts, or if the voltage reading is higher than what the PCM considers normal under certain circumstances, a P0108 DTC will set.

Symptoms of a P0108 DTC code may include:
* MIL (Malfunction Indicator Lamp) will likely be on
* Engine may run poorly
* Engine may not run at all
* Fuel mileage may decrease
* Presence of black smoke at exhaust

Potential causes of a P0108 code:
* Bad MAP sensor
* Leak in vacuum supply line to MAP sensor
* Engine vacuum leak
* Short on signal wire to PCM
* Short on reference voltage wire from PCM
* Open in ground circuit to MAP
* Worn engine causing low vacuum

Possible Solutions:
A good way to diagnose if the MAP sensor is to blame would be to compare the KOEO (key on engine off) MAP sensor reading on a scan tool with the Barometric pressure reading. They should be the same because they both measure atmospheric pressure.

If the MAP reading is greater than 0.5 volt off of the BARO reading, then replacing the MAP sensor would likely fix the problem. Otherwise, start the engine and observe the MAP reading at idle. It should normally be about 1.5 volts (varies according to altitude).

a. If it is, the problem is likely intermittent. Check all the vacuum hoses for damage and replace as necessary. You can also try wiggle testing the harness and connector to reproduce the problem.
b. If the scan tool MAP reading is more than 4.5 volts, check the actual engine vacuum reading with the engine running. If it is less than 15 or 16 in. Hg, then the PCM is probably not seeing enough vacuum (due to a worn engine, perhaps) for a given operating condition (which causes a higher than normal voltage signal to the PCM) and setting the code. Repair the engine vacuum problem and retest.
c. But, if the actual engine vacuum reading is 16 in. Hg or more, then unplug the MAP sensor. The scan tool MAP reading should indicate that there is no voltage present. Check that the ground from the PCM is intact and also that the MAP sensor connector and terminals are tight. If the connection is good, then replace the map sensor.
d. However if, with KOEO, & the MAP sensor unplugged, the scan tool shows a voltage reading, then there may be a short in the harness to the MAP sensor. Turn the ignition off. At the PCM unplug connector and remove the MAP signal wire from the connector. Re-attach the PCM connector and see if with KOEO, the scan tool MAP reading shows voltage. If it still does, replace the PCM. If not, check for voltage on the signal wire you just removed from the PCM. If there is voltage on the signal wire, find the short in the harness and repair.


P0104 - Mass Air Flow (MAF) Circuit Intermittent
Basically this means that there is a problem with the Mass Air Flow High (MAF) sensor or circuit. A more technical description would be that the MAF is producing incorrect air flow readings. Other MAF sensor circuit DTC trouble codes are P0100, P0101, P0102, and P0103.

Symptoms: You will likely not notice any serious drivability problems, although there may be symptoms such as a general decrease in power or sluggishness.

Causes: A code P0104 may mean that one or more of the following has happened:
* The mass air flow (MAF) circuit is incomplete (broken / frayed wire, etc.)
* There is an air leak in the intake system

Possible Solutions: The simplest thing to do is to reset the code and see if it comes back. Then start with the cheapest, easiest repair procedures:
* Verify that the Mass Air Flow Sensor wiring is connected properly and that there are no broken / frayed wires.
* Inspect for any air leaks near the MAF sensor.
* Check the voltage of the MAF sensor (refer to a repair manual for vehicle specific information)
* Replace the MAF sensor.



P0102 - Mass Air Flow (MAF) Circuit Low Input
Basically this means that there is a problem with the Mass Air Flow (MAF) sensor or circuit. A more technical description would be that the MAF circuit had lower than expected voltage (air flow). Other MAF sensor circuit DTC trouble codes are P0100, P0101, P0103, and P0104.
Symptoms: You will likely not notice any serious drivability problems, although there may be symptoms such as a general decrease in power or sluggishness.

Causes: A code P0102 may mean that one or more of the following has happened:
* The MAF may be disconnected, or a wiring connection may be bad
* The MAF may be dirty or otherwise contaminated (Note: if you use a reusable oiled air filter, be careful not to apply too much oil or that can contaminate the MAF).
* The MAF sensor may be faulty
* The vehicle computer may be faulty (very rare)

Possible Solutions: The simplest thing to do is to reset the code and see if it comes back. Then start with the cheapest, easiest repair procedures:
* Verify that the Mass Air Flow Sensor wiring is connected properly and that there are no broken / frayed wires.
* Inspect for any air leaks near the MAF sensor.
* Take the MAF out and clean it using a spray cleaner such as brake cleaner or electrical contact cleaner. Be gentle with the sensor.
* Check the voltage of the MAF sensor (refer to a repair manual for vehicle specific information)
* Replace the MAF sensor.




P0101 - Mass Air Flow (MAF) Circuit Range/Performance Problem
Basically this means that there is a problem with the Mass Air Flow (MAF) sensor or circuit. The PCM detects that the actual MAF sensor frequency signal is not within a predetermined range of the calculated MAF value for more than 4.0 seconds. Other MAF sensor circuit DTC trouble codes are P0100, P0102, P0103, and P0104.

Symptoms: You will likely not notice any serious drivability problems, although there may be symptoms.

Possible Solutions: The simplest thing to do is to reset the code and see if it comes back. Then start with the cheapest, easiest repair procedures:
* Inspect for the following conditions:
An incorrectly routed harness--Inspect the harness of the MAF sensor in order to verify that it is not routed too close to the following components:
- The secondary ignition wires or coils
- Any solenoids
- Any relays
- Any motors
* A low minimum air rate through the sensor bore may cause this DTC to set at idle or during deceleration. Inspect for any vacuum leaks downstream of the MAF sensor.
* A wide open throttle (WOT) acceleration from a stop should cause the MAF sensor g/s display on the scan tool to increase rapidly. This increase should be from 6-12 g/s at idle to 230 g/s or more at the time of the 1-2 shift. If the increase is not observed, inspect for a restriction in the induction system or the exhaust system.
* The barometric pressure (BARO) that is used in order to calculate the predicted MAF value is initially based on the MAP sensor at key ON.
* When the engine is running the MAP sensor value is continually updated near WOT. A skewed MAP sensor will cause the calculated MAF value to be inaccurate. The value shown for the MAP sensor display varies with the altitude. With the ignition ON and the engine OFF, 103 kPa is the approximate value near sea level. This value will decrease by approximately 3 kPa for every 305 meters (1,000 feet) of altitude.
* A high resistance on the ground circuit of the MAP sensor can cause this DTC to set.
* Any loss of vacuum to the MAP sensor can cause this DTC to set.

If you suspect the condition may be related to aftermarket accessories, refer to Checking Aftermarket Accessories in Wiring Systems. Here as an aid in resolving your P0101 trouble code (DTC)...

continue...

Jan 20, 2011 | 2002 Jaguar X-Type

3 Answers

Diagnostic codes


P0102 OBD-II Trouble Code - Mass Air Flow (MAF) Circuit Low Input

What does that mean?
Basically this means that there is a problem with the Mass Air Flow (MAF) sensor or circuit. A more technical description would be that the MAF circuit had lower than expected voltage (air flow). Other MAF sensor circuit DTC trouble codes are P0100, P0101, P0103, and P0104.

Symptoms
You will likely not notice any serious drivability problems, although there may be symptoms such as a general decrease in power or sluggishness.

Causes
A code P0102 may mean that one or more of the following has happened:
* The MAF may be disconnected, or a wiring connection may be bad
* The MAF may be dirty or otherwise contaminated (Note: if you use a reusable oiled air filter, be careful not to apply too much oil or that can contaminate the MAF).
* The MAF sensor may be faulty
* The vehicle computer may be faulty (very rare)

Possible Solutions
The simplest thing to do is to reset the code and see if it comes back. Then start with the cheapest, easiest repair procedures:
* Verify that the Mass Air Flow Sensor wiring is connected properly and that there are no broken / frayed wires.
* Inspect for any air leaks near the MAF sensor.
* Take the MAF out and clean it using a spray cleaner such as brake cleaner or electrical contact cleaner. Be gentle with the sensor.
* Check the voltage of the MAF sensor (refer to a repair manual for vehicle specific information)
* Replace the MAF sensor.


P0113 - Intake Air Temperature Circuit High Input

What does that mean?
The powertrain control module (PCM) monitors the temperature of the air entering the engine. The PCM supplies a 5 volt reference voltage to the Intake Air Temperature (IAT) sensor. The IAT is a thermistor that varies resistance based on temperature. As the temperature increases, resistance decreases. Low temperature results in a high signal voltage. When the PCM sees a signal voltage higher than 5 volts, it sets this P0113 check engine light code.

Potential Symptoms
There will likely be no symptoms other than illumination of the Malfunction Indicator Lamp (MIL - Check Engine Light / Service Engine Soon).

Causes
A code P0113 may mean that one or more of the following has happened:
* Internally failed IAT sensor
* Faulty connection at IAT sensor
* Open in IAT ground circuit or signal circuit
* Short to voltage in IAT signal circuit or reference circuit
* IAT harness and/or wiring routed too close to high-voltage wiring (e.g. alternator, spark plug cables, etc.)
* Faulty PCM (less likely but not impossible)

Possible Solutions
First, if you have access to a scan tool, is there an IAT reading? If the IAT reading is logical then the problem is likely intermittent. If the reading is less than -30 degrees, unplug the connector. Install a jumper wire between the harness connector signal and ground circuits. The IAT temperature reading on the scan tool should be maxed out at the high end. For example it should be 280 degrees Farenheit or higher. If it is, the wiring is okay, and it may have been the connection. If it isn't install the jumper wire between the IAT signal circuit and the chassis ground. If now the IAT reading on the scan tool is maxed out then check for an open in the IAT ground circuit. If you get no reading at all on the scan tool, it's likely that the sensor signal is open or the 5 volt reference is missing. Check using a DVOM (digital volt ohm meter) for a 5 volt reference. If it's there, then unplug the connector at the PCM and check for continuity on the IAT signal circuit between the PCM connector and the IAT connector.

I really hope help with this (remember rated this).

May 21, 2010 | 2002 Ford Taurus

3 Answers

After changing fuel pump 2 days ago on my 97 pontiac gtp. it started idling high (2500rpm) then today after getting code p0102(maf sensor) and codes p0122-p0507-p1441 it died on way home and wont start. is...


You can test the MAF before replacing. It may be a problem with the circuit itself or just a fluke from another problem that is connected to this sensor.

There are two basic types of mass airflow sensors: hot wire and hot film. In the first type, a very thin wire (about 0.2 mm thick) is used as the heated element.
f27-31.gif Components of a hot wire-type mass airflow sensor. Courtesy of Ford Motor Company. The element temperature is set at 100° to 200°C above incoming air temperature. Each time the ignition switch is turned to the off position, the wire is heated to approximately 1,000°C for 1 second to burn off any accumulated dust and contaminants.
The second type uses a nickel foil sensor, which is kept 75°C above ambient air temperatures. It does not require a burn-off period and therefore is potentially longer lasting than the hot wire type.
A faulty MAF will cause driveability problems resulting from incorrect ignition timing and improper air/fuel ratios.
Vane-type MAF Sensors
A vane-type MAF sensor is found on many import and domestic vehicles with EFI. All intake air must flow through the sensor. Some MAF sensors are called volume air flow meters
  • Begin checking a vane-type MAF sensor by checking the voltage supply wire and the ground wire to the MAF module before checking the sensor voltage signal.
  • Always follow the recommended test procedure in the manufacturer's service manual and use the specifications supplied by the manufacturer.
  • Typically, to test the sensor, a digital multimeter (DMM) is used and set on a DC voltage scale. The negative meter lead is connected to ground and the red lead to the MAF signal wire.
f_32.44.gif A voltmeter connected to measure the signal from a MAF sensor. Reproduced with permission from Fluke Corporation.
  • Turn on the ignition switch and press the min/max button, if available, on the DMM.
  • Slowly push the MAF vane from the closed to the wide-open position, and allow the vane to slowly return to the closed position.
f_27.33.gif Move the MAF sensor air vane from open to close to test it. Reproduced with permission from Fluke Corporation.
  • Observe the maximum and minimum voltage readings as the vane was moved.
  • If the minimum voltage signal is zero, there may be an open circuit in the MAF sensor variable resistor.
  • When the voltage signal is not within the manufacturer's specifications, replace the sensor.
WARNING While pushing the mass air flow sensor vane open and closed, be careful not to mark or damage the vane or sensor housing.
  • Some vehicle manufacturers specify ohmmeter tests for the MAF sensor.
  • With the MAF sensor removed, connect the ohmmeter across the sensor's output and input terminals.
f_32.45.gif Ohmmeter connections to a MAF sensor. Reprinted with permission.
  • The resistance at these terminals is normally 200 to 600 ohms.
  • Connect the ohmmeter leads to the specified MAF sensor terminals, and move the vane from the fully closed to the fully open position.
  • With each specified meter connection and vane position, the ohmmeter should indicate the specified resistance.
f_32.46.gif Resistance specifications for a typical MAF sensor with door open and closed. Reprinted with permission.
  • When the ohmmeter leads are connected to the sensor's input and output terminals, the ohmmeter reading should increase smoothly as the sensor vane is opened and closed.
  • To check a vane-type MAF with a lab scope, connect the positive lead to the output signal terminal and the negative scope lead to a good ground.
  • This type MAF should display an analog voltage signal when the engine is accelerated. A defective MAF will have sudden and erratic voltage changes.
f_32.47.gif The trace of a defective vane-type MAF sensor. Reproduced with permission from Fluke Corporation. Hot-Wire-Type MAF Sensors
The test procedure for heated resistor and hot-wire MAF sensors varies depending on the vehicle make and year. Always follow the test procedure in the appropriate service manual. A frequency test may be performed on some MAF sensors, such as the AC Delco MAF on some General Motors' products.
  • To check the MAF sensor's voltage signal and frequency, connect a voltmeter across the MAF voltage signal wire and ground wire.
  • Start the engine and observe the voltmeter reading.
  • On some MAF sensors, this reading should be 2.5 volts.
  • Lightly tap the MAF sensor housing with a screwdriver handle and watch the voltmeter pointer.
  • If the pointer fluctuates or the engine misfires, replace the MAF sensor.
  • Some MAF sensors have experienced loose internal connections, which cause erratic voltage signals and engine misfiring and surging.
  • Set the DMM so that it can read the frequency of DC voltage.
  • With it still connected to the signal wire and ground, the meter should read about 30 Hz with the engine idling.
  • Now, increase the engine speed, and record the meter reading at various speeds.
  • Graph the frequency readings. The MAF sensor frequency should increase smoothly and gradually in relation to engine speed.
  • If the MAF sensor frequency reading is erratic, replace the sensor.
f_32..48.gif Satisfactory and unsatisfactory MAF sensor frequency readings. Reproduced with permission from Fluke Corporation.
  • When a scanner is used to diagnose a General Motors' vehicle, one test mode displays grams per second from the MAF sensor. This mode provides an accurate test of the MAF sensor.
  • The grams per second reading should be 4 to 7 with the engine idling.
  • This reading should gradually increase as the engine speed increases.
  • When the engine speed is constant, the grams-per-second reading should remain constant.
  • If the grams-per-second reading is erratic at a constant engine speed or if this reading varies when the sensor is tapped lightly, the sensor is defective.
  • A MAF sensor fault code may not be present with an erratic grams-per-second reading, but the erratic reading indicates a defective sensor.
  • Frequency-varying types of MAF sensors can be tested with a lab scope.
  • The waveform should appear as a series of square waves.
f_32.49.gif A normal trace for a frequency-varying MAF sensor. Courtesy of Progressive Diagnostics--WaveFile AutoPro.
  • When the engine speed and intake air flow increases, the frequency of the MAF sensor signals should increase smoothly and proportionately to the change in engine speed.
  • If the MAF or connecting wires is defective, the trace will show an erratic change in frequency.
f_32.50.gif The trace of a defective frequency-varying MAF sensor. Courtesy of EDGE Diagnostics Systems.

There is also a
Mass Air Flow (MAF) Burn-Off Module Operation:
00375_maf_burn_off_module.jpgA semi-conductor control for an electronic-ignition system.

Nov 17, 2009 | Pontiac Grand Prix Cars & Trucks

2 Answers

Car won't accelerate at all


P0102 is mass air flow sensor. Even though it is a says short to ground, I believe i would change it. That is probably what the problem is. Do check the wiring to it though. Look for any obvious signs of broken wire or bare wire touching a ground. Otherwise change the MAF. They are easy to change and are in the intake of your air cleaner.It will cause the problem you are talking about.

Aug 14, 2009 | 2002 Chevrolet Impala

1 Answer

2004 gmc sierra


P0102 is mass air flow sensor circuit, low input the MAF is attached to the air cleaner where the hose runs out of it... Unplug it and check the voltage supply and the ground... looking into the plug, with the tab facing up, there will be 3 connecters inside it, left to right they are.... sensor signal, ground and supply.... make sure you have 12 volts at your supply and the ground is good good luck

Feb 27, 2009 | 2004 GMC Sierra

1 Answer

2002 chevy impla v6 esngine 3800 check engine light is on, codes read po102 what does this mean


Code p0102, on either the 3.4 or 3.8 (3800) v6 engine is a problem in the Mass Air Flow sensor (MAF). If any work has been done to it just prior to this code, then you need to make sure the air cleaner, duct work, breather tubes, etc. are properly connected and not loose. If that is OK, then may have a bad, or dirty sensor.
Tech JK

Dec 20, 2008 | 2006 Chevrolet Impala

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