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Will the MAP Sensor cause the a/c blower to stop

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The MAP sensor is for fuel to air mixture going into the engine. It doesn't affect the a/c system at all.

Posted on Nov 17, 2013

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Posted on Jan 02, 2017

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I am getting three different codes on my 2001 Mercedes ml320. p0103, p0106, and p0453.


code p 0103 refers to mass air flow(MAF) sensor/ volume air flow(VAF) sensor --high input===causes ---short to positive---maf/vaf sensor/s---ECM
code p 0106 refers to manifold absolute pressure(MAP) sensor/barometric pressure(BARO) sensor---range /performance problem===causes ---intake /exhaust leak--map sensor---baro sensor
a leak here could be the hose to the cabin to control the vent operation, transmission actuator hose leak and the exhaust leak could be a cracked flex section of the exhaust pipe near the manifold
code p 0453 refers to evaporative emission(EVAP) pressure pressure sensor---high output===causes --wiring short to positive --EVAP pressure sensor---ECM
I would fix the EVAP symptoms first as as it will show as some of the problems you have mentioned

Feb 04, 2017 | Mercedes-Benz Cars & Trucks

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I have a 2003 S-type jaguar that goes into a limp mode and stops running then the engine system fault shows ,the parkbrake fault and DSC not available also shows. Diagnostic showed codes PO121,P1582??


code p 0121 is associated with the throttle position sensor and accelerator position sensor
causes are from cable adjustment --throttle position and accelerator position sensors
code p0533 refers to ac refrigerant pressure sensor--high input== causes --ac pressure too high (cooling fault -condenser fan not running at radiator-- too much gas --pressure sensor
p 0105 refers to map sensor / barometric pressure sensor --circuit malfunction===causes wiring--- map sensor --baro sensor ECM
code p0566 refers to cruise control master switch== causes --control switch , ---ECM
code p1582 refers to electronic throttle monitor data available which will be associated with the p 0121 code and faults

Jan 08, 2017 | Jaguar Cars & Trucks

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Will the map sensor cause it to hesitate and cause smoke that smells like gas to come out of the tailpipe?


yep map sensor control fuel and spark advance.map sensor could be faulty also make sure map sensor getting vacuum could have broken or disconnected vacuum line or electrical connector could be disconnected.problem with map sensor will cause check engine light flash on fault code.

Oct 22, 2013 | 2001 Chrysler Town & Country

1 Answer

95 cadillac reading code current p105 sometimes engine light comes on sometimes harder to start than normal, idles up and down up on stopping


Symptoms Symptoms of a P0105 check engine light code may include:
  • Poor running engine
  • Engine runs rich
  • Engine won't idle
  • Engine backfires through tailpipe
  • Engine misfire under load or at idle
  • MIL (Malfunction Indicator Lamp) illumination
  • In some extreme cases there may be no symptoms other than MIL illumination
Causes A P0105 DTC could be caused by:
  • MAP sensor vacuum hose disconnected or plugged
  • Bad MAP Sensor
  • Bad TPS
  • Damaged or problematic MAP sensor connector
  • Damaged or problematic TPS connector
  • Damaged wiring
  • Short to reference voltage on signal circuit of MAP Sensor
  • Loss of ground to MAP sensor or TPS
  • Open on signal circuit of MAP sensor
  • Bad PCM
Possible Solutions Using a scanner or code reader, turn the ignition on and engine OFF; what does the MAP sensor voltage read? It should be about 4 Volts for sea level. If you are at a higher altitude, it should decrease about half a volt or so for each 1,000 ft. of altitude (this will vary from model to model) Or if you have a separate MAF (Mass air flow) sensor on your vehicle, they are usually equipped with a Barometric pressure reading. If so, the Baro reading should match the MAP reading (they both measure ambient air pressure). If they're roughly equal, then, check for Freeze Frame data of the MAP sensor (if available).
NOTE: Freeze Frame data is the PCM recording a fault when it happens. It captures the readings of the various PIDS (parameter identifiers)available to troubleshoot what happened. It's like a recording of the problem as it happened. At idle a typical MAP sensor Voltage reading should be about a volt, and at WOT (wide open throttle) it should approach 4.5 to 5 Volts. As for the TPS, at idle, the voltage reading is about 1 Volt or less. As the throttle is opened the reading will increase to 4.5 Volts at WOT. Do the two readings make sense? For example, if the TPS reading on Freeze Frame data shows 2.5 Volts (indicating partial throttle) does the MAP sensor indicate a reading that isn't at either extreme? Using the Freeze Frame data (if available) compare the MAP reading to the TPS when the problem occurred. This can help you identify what happened
If you have no access to Freeze Frame data then check if the MAP sensor voltage changes when you apply vacuum to it. You can do this by mouth or a vacuum pump. The voltage should increase as you apply vacuum. If the reading doesn't change as you apply vacuum, make sure there are no obstructions in the hose to the sensor. If the hose is clear, the MAP sensor is usually bad, but it doesn't rule out the following from causing the problem: Does the MAP sensor appear to be stuck at less than .5 Volts? Then:
NOTE: This code shouldn't set if the MAP is stuck at extremely low voltage, however, I'm adding it in because there's no way to know for certain for which vehicles a low voltage condition may set a P0105
  1. Inspect the wiring harness and MAP sensor connector. Repair any damage
  2. Unplug the MAP sensor connector. Also, at the PCM connector, remove the MAP sensor signal wire and check for continuity to the MAP sensor connector. If there is infinite resistance, then repair open in MAP signal circuit. If the signal wire has continuity to the MAP sensor connector, then check for 5 volt reference voltage to the connector and a good ground. If both are present, then re-install all removed wiring and replace the MAP sensor.
Does the MAP sensor appear to be stuck at full 4.5 voltage? Then:
  1. Inspect the wiring harness for damage. Repair as needed
  2. Remove the MAP sensor signal wire from the PCM connector. With a voltmeter measure the voltage with KEY ON ENGINE OFF. Is there 4.5 Volts? If so, unplug the MAP sensor and recheck. If it is still present, then repair short between the signal wire and 5 volt reference wire.
  3. If unplugging the MAP sensor causes the voltage to disappear, check that the ground is intact. If it is, then replace the MAP sensor due to internal short.

Jun 17, 2011 | 1995 Cadillac DeVille

1 Answer

I have a 1999 malibu it start and run for short time but them stop.if i started again them it dosent have any signal at the spark plug. it have been 2 days that this is goin up this mornig i started and...


map sensor control fuel delivery and ignition timing.the map sensor is your load sensor when engine closed throttle high vacuum wide open throttle low vacuum.need more fuel and spark.when your engine at wide open throttle. low vacuum.cause electrical volts to increase to 5 volts in which pcm will increase fuel pressure and spark.the map sensor does control spark also.replace map sensor erase code and see what happens.

Apr 16, 2011 | 1998 Chevrolet Malibu

1 Answer

Engine Code P0108. The engine revs up high and back low about 10 times before idling normally when first turned on. then there is other idling issues when accelerating to hard or at a stop. Are there...


P0108 - MAP 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


Causes: 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.


Hope helps (remember to rate this answer).

Apr 05, 2011 | 2003 Chrysler PT Cruiser

2 Answers

Just bought2005 Volvo s40 2.4i. It shows the check engine light and it stalled at 2 times in at stop signs. I sent it to Jiffy Lube and they were kind to check the cause for me. The code read as...


Basically what this means is that there is a problem with the MAF (Mass Air Flow) Sensor circuit.

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.

Aug 30, 2010 | Volvo S40 Cars & Trucks

1 Answer

I got a check engine light and now it's gone. Code P0101 What do I need to look at and how?


Mass Air Flow (MAF) Circuit Range/Performance Problem

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.

Nov 11, 2009 | 2000 GMC Safari

2 Answers

I got a code P0101 and have cleaned the MAF, should this fix the problem?


P0101 shows possible failing PCV valve as well as the MAF sensor. If neither of these fixes the problem, it's a possible PCM issue.

Jul 06, 2009 | 2004 Chevrolet Silverado 2500HD

1 Answer

CAR RPN GOES UP AND DOWN WHEN A DEAD STOP


it might have a lick on your valve make a compression test to justify it..or you may need a tune up on your car it should cause that problem too . if it your map sensor it should trow a code in it so i probably say that your map sensor is still working as a champ.

Dec 27, 2008 | 1996 Nissan Altima

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