Question about Cars & Trucks

1 Answer

I got my 2004 impala diagnosis and it said I have a defective oxygen sensor and my engine is getting to much oxygen and it say low voltage to the computer plus my fuel is running very lean fuel pump defective what does this mean?

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Cars & Trucks Master
  • 3,679 Answers

This signal is from a sensor on the exhaust system telling the engine there is a fuel mixture problem , it may be the actual sensor gone faulty but first check all air intake hoses for signs of splits etc , because if the air going in the engine isn't correct the exhaust coming out wont be either, if all look ok i'd put a fuel addative in the tank , make sure you get one that says for catalytic converters as well as engine , this will clear away carbon deposits etc that have built up over time may have to do this twice ,requires a full tank to add to , if still getting the code after having it cleared then most likely is one of the o2 sensor 's on the exhaust, the code will tell which one , good luck and keep me posted if you wish

Posted on May 17, 2014

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

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

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad
  • 1 Answer

SOURCE: 1995 GMC Sierra

check you ideler sensor i had the same problem on

Posted on Oct 07, 2008

bitchn65cuda
  • 70 Answers

SOURCE: SERVICE ENGINE SOON LIGHT ON

you need to change the oxygen sensor. it will soon cause you problems. after you need to take it in to  erase the code.

Posted on Apr 20, 2009

Molson02536
  • 3854 Answers

SOURCE: location of oxygen sensor

I believe you may have three (3) O2 sensor, (2) of the sensor is on ether side of the exhaust down pipe and some times called up stream O2 sensor, the third O2 sensor know to some as the down stream O2 and is after the Catalytic converter.
The up stream O2 monitors the left and right side banks and sends signals to the ECM to make the adjustments to the injectors to keep the proper air/fuel ratio. 
The down stream O2 monitors the catalytic converter and sends signal to the ECM if the catalytic converter has gone bad.
Good luck and hope this helps. If you get it scanned at Auto Zone, they should be able to let you know which O2 has gone bad so as to not change all three. You could always check the wire harness to the down stream O2 for corrosion. Keep me posted

Posted on May 29, 2009

  • 1311 Answers

SOURCE: 2004 GMC Envoy.Check engine soon

This code indeed does indicate a bad thermostat, but not in a way as overheating but the coolant temperature is not rising fast enough at warm up because the stat is always in the open position.

The rushing air sound you heard was most likely the electronic fan clutch starting to go bad. This is a common problem.

Posted on Nov 24, 2010

ZJLimited
  • 17970 Answers

SOURCE: heated oxygen sensor-bank1 sensor2 [ho2s12] circuit

HO2-S12 (Oxygen sensor 1 Bank 2) it is screwed into the exhaust system downstream (tailpipe side) of the catalytic converter.

We dont know exactly the "code number" of your description, but we could advance that is refer at bad O2 sensor in this position. Possible causes:
Contaminated HO2S.
Exhaust leaks.
Shorted/open wires.
Improper fueling.
MAF sensor.
Deteriorating HO2S.
Air leaks.

This specific Diagnostic Trouble Codes (DTCs) indicate the response rate of the upstream HO2S(s) is below some calibrated window. The test measures the HO2S amplitude and output frequency. This is accomplished by superimposing a 1.5 to 2.5 Hz square wave over Lambse. The HO2S switching is monitored during this time to see if the calibration limit is met.

Additionally, some models have a secondary air injection (AIR) system is designed to lower the exhaust emission levels after engine start up. The Powertrain Control Module (PCM) commands the AIR pump relay ON by supplying a ground to the relay control circuit. This action energizes the AIR pump which forces fresh air into the exhaust stream. The PCM also commands the AIR vacuum control solenoid valve ON by supplying a ground to the control circuit. With the AIR solenoid activated, engine vacuum is then applied to the AIR shut-off valves. Fresh air from the AIR pump then enters into the exhaust stream. The air that is introduced into the exhaust system accelerates catalyst operation reducing exhaust emission levels. When the AIR system is inactive, the AIR shut-off valves prevent air flow in either direction.

After a warm start up the PCM can detect an AIR system air flow fault by monitoring the heated oxygen sensors (HO2S) and short term fuel trim (FT) values. This is a passive test. If the passive test indicates a pass, the PCM takes no further action. If the passive test fails or is inconclusive, the PCM diagnostic will proceed with an intrusive or active test. The PCM will command the AIR system ON during Closed Loop operation. The active test will pass or fail based on the response from the HO2S. The active test consists of three tests run at 3 second intervals. A lean HO2S response indicates that the secondary AIR system is functioning properly. An increasing short term FT value also indicates a normal functioning system. The AIR diagnostic consists of the combination of the passive and the active tests. If the PCM detects that the HO2S and short term FT did not respond as expected on bank 1 and bank 2 DTC P0410 sets.

The AIR system consists of the following components:
The AIR pump
The shut-off valves
The vacuum control solenoid valve
The system pipes/hoses
The AIR pump relay, the fuses, and the related wiring

CONDITIONS FOR RUNNING THE DTC
DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0121, P0122, P0123, P0130, P0131, P0132, P0133, P0134, P0135, P0137, P0138, P0140, P0141, P0150, P0151, P0152, P0153, P0154, P0155, P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0300, P0335, P0336, P0351, P0352, P0353, P0354, P0355, P0356, P0357, P0358, P0412, P0418, P0506, P0507, P1133, P1134 are not set.

Passive Tests
The engine is running for more than 3 seconds .
The engine speed is more than 600 RPM .
The throttle is steady.
The engine load is less than 80 percent .
The system voltage is more than 10.5 volts .
The mass air flow (MAF) is less than 35 g/s .
The air/fuel ratio is more than 12.5:1.
The engine coolant temperature (ECT) is between 5-108.5°C (41-227°F) .
The engine coolant start up temperature (ECT) is between 5-80°C (41-176°F) .
The intake air temperature (IAT) is between 5-72.5°C (41-162°F) .
The power enrichment or the deceleration fuel cut-off (DFCO) is not active.

Active Tests
The engine is running for more than 3 seconds .
The engine speed is more than 600 RPM .
The throttle is steady.
The engine load is less than 80 percent .
The system voltage is more than 10.5 volts .
The MAF is less than 35 g/s .
The fuel system is in Closed Loop operation.
The evaporative emissions (EVAP) purge is active.
The ECT is more than 68°C (154°F) .
The vehicle speed is between 56-72 km/h (25-35 mph) .

CONDITIONS FOR SETTING THE DTC
Passive Tests:
- The HO2S voltage for both fuel control sensors is more than 470 mV for 20 seconds , 200 mV for 7 seconds on a warm start while the AIR system is commanded ON.
- The HO2S voltage for both fuel control sensors do not toggle above 600 mV for 25 seconds, 7 seconds on a warm start while the AIR system is commanded ON.

Active Test
- The AIR passive test is inconclusive or failed.
- The HO2S voltage for both fuel control sensors is more than 250 mV for three 3 second active tests.

ACTION TAKEN WHEN THE DTC SETS
The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

CONDITIONS FOR CLEARING THE MIL/DTC
The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
Clear the MIL and the DTC with a scan tool.

DIAGNOSTIC AIDS
NOTE: Refer to Connector Test Adapter Kit J 35616-A Notice in Service Precautions.

Reviewing the Failure Records vehicle mileage since the diagnostic test last failed may help to diagnose the condition. The information may help to determine how often the condition that set the DTC occurs.
Inspect for the following conditions:
A Low AIR system air flow may cause this DTC to set.
Any excessive exhaust system back-pressure
Any moisture, water, or debris ingestion into the AIR pump
Any restrictions in the AIR pump inlet, duct, or filter
An intermittent may be caused by any of the following conditions:
Any pinched hoses or vacuum lines
Any kinked pipes/hoses or vacuum lines
Any split pipes/hoses or vacuum lines
Any heat damaged pipes
Any deteriorated hoses or vacuum lines
Any reversed inlet and outlet hoses at the AIR pump may cause a reduced air flow. This condition may cause this DTC to set. The AIR pump inlet and outlet ports should be clearly identified on the pump.
An AIR solenoid stuck open or leaking vacuum internally may hold the shut-off valves open, an audible exhaust popping noise may be heard through the air pump inlet hose. This condition may not set a code and may cause the fuel trim parameters to indicate a high percentage value at an idle
The AIR solenoid vents the vacuum from the shut-off valves when the system is inactive. Verify proper connections of vacuum hoses, reversed connections at the AIR solenoid may cause the AIR shut-off valves to be held open.
When commanding the AIR System ON with a scan tool the PCM will activate the AIR pump and the AIR solenoid. The fuel control system will then enter open loop status. This action will allow fresh air to enter the exhaust stream and cause the HO2S mV parameter to drop to near 0 mV . This would indicate a properly operating AIR system.
However if the AIR pump does not operate or there is no air flow from the pump entering the exhaust stream due to a leak in the system, the HO2S parameter may still drop below 100 mV . This is due to the fresh air being drawn into the exhaust stream from the opening of the shut-off valves. The HO2S will respond with a drop in mv readings as a result of this air leaning out the exhaust. The voltages may decrease to below 100 mV but not approach 0 mV .
If the condition is intermittent, refer to Intermittent Conditions.

TEST

zjlimited_554.gif

zjlimited_555.gif

zjlimited_556.gif

continue...

Posted on Aug 02, 2011

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Service engine light on in a 2004 cadillac seille


Wow! I wish I had a dollar for every time I have heard this. I would be a RICH man! Please READ the article below to get a better understanding of what is going on:

What Else Could Be Wrong?

After reading the article, maybe you will understand that "lean oxygen sensor" codes are RARELY the fault of the oxygen sensor. When they are, it is HIGHLY UNLIKELY that BOTH upstream oxygen sensors would be defective at the same time. You probably have a large vacuum leak or a bad mass airflow sensor. Proper diagnosis required.

May 15, 2012 | 2004 Cadillac Seville SLS

2 Answers

Check Engine light with Po131 o2 circuit low voltage sensor 1 bank 1 reading, what does that mean?


- Front Heated Oxygen Sensor Bank 1 harness is open or shorted
- Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Faulty Front Heated Oxygen Sensor Bank 1
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks

Replacing the O2 Sensor 1 usually takes care of the problem

The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.

Feb 07, 2012 | 2004 Honda Odyssey

1 Answer

I have a 05 chevy impala check engine code p0036 n p0142 bank one sensor two which sensor do I replace


If you have access to a scan tool, check the signal voltage for the Bank 1,3 oxygen sensor with the engine at normal operating temperature. Is it stuck low currently? If so, increase RPM for a few seconds and see if it affects the reading. If it begins working with increased RPM, check for holes in the exhaust near the O2 sensor that may cause a false lean. If the exhaust pipe is intact, the sensor is sluggish, replace it. If the Bank 1,3 O2 sensor voltage reading remains low with increased RPM, unplug it and then observe the reading. It should have increased to about 0.5 volts or thereabouts. If it did, check for water intrusion or other connector problems. If none are found, replace the shorted O2 sensor.

Jul 14, 2011 | 2005 Chevrolet Impala

1 Answer

What could the problem be for my 1996 ford escort 1600 zetec 16 valve its consuming too much petrol and it smells from the exhaust pipe and it smokes a little


Do you have any error codes to help in the diagnosis. Failing that, it sounds as if your car is not entering 'closed loop' properly. When an engine is warming up, in 'open loop' mode, the engine's computer calls on the injectors to inject more fuel to keep the engine running, to warm up the engine quickly and to have the catalytic converter to start working early. This is why the engine idles quickly at start up. The coolant sensor informs the computer about engine temperature. When the engine is in 'closed loop' the engine is at normal running temperature and the computer no longer looks to the coolant sensor but to the oxygen sensor on the exhaust to establish the correct fuel air ratio. If the oxygen sensor is not working the computer continues as if the engine is in still 'open loop' mode.
First check the MAF sensor next to the air cleaner box on the ducting. If dirty take it out and give it a spray with residue free electrical cleaner (do not use carb cleaner as it too harsh and leaves its own residue). Next check coolant levels, if coolant level low the coolant sensor may not be able to detect its temperature.
Next check the coolant sensor, its electrical resistance drops as it gets warmer, so check at cold and after 1 minute running and there should be quite a difference. If not the sensor is bad and needs changing.
Finally check the oxygen sensor. When lean (lots of oxygen in the exhaust) the output from the sensor is low voltage (about 0.1volt) and when rich the voltage is 1volt. If the oxygen sensor is says, in error, that the exhaust is lean (low or no voltage) the computer will respond by increasing the fuel injected to compensate.
Most fuel economy issues are due to the four areas above

Apr 26, 2011 | 1997 Ford Escort

2 Answers

The engine light and VSC light are on (Vehicle Singapore 2004 Lexus RX 300. Diagnostics report Error code P0037


your o2 sensor is bad. vsc will go on for any small DTC displayed on the MIL (cel)

P0037 LEXUS P0037 LEXUS - Oxygen Sensor Heater Control Circuit Low Bank 1 Sensor 2 Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
Possible causes - Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit open shorted to ground
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit poor electrical connection
- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit fuse
- Faulty Engine Control Module (ECM) When is the code detected? The P0037 is set when the ECM detects an excessively low voltage through the heated oxygen sensor heater circuit P0037 LEXUS Description Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. The faster the heated oxygen sensor reaches that temperature the faster the sensor will start sending an accurate signal to the Engine Control Module (ECM).

In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECMcontrols the heater element circuit by allowing current flow to ground.

The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.

o2_heater_circuit.gif

Mar 14, 2011 | 2004 Lexus RX 330

3 Answers

Where are the o2 sensors located on a 2004 jeep grand cherokee and what are they called?


Grand Cherokee oxygen sensor locations for 4.0 and 4.7 engines...

zjlimited_625.jpg


zjlimited_626.jpg

An O2 sensor is a galvanic battery that provides the PCM with a voltage signal (0-1 volt) inversely proportional to the amount of oxygen in the exhaust. In other words, if the oxygen content is low, the voltage output is high; if the oxygen content is high the output voltage is low. The PCM uses this information to adjust injector pulse-width to achieve the 14.7-to-1 air/fuel ratio necessary for proper engine operation and to control emissions.

The O2 sensor must have a source of oxygen from outside of the exhaust stream for comparison. Current O2 sensors receive their fresh oxygen (outside air) supply through the O2 sensor case housing.

Four wires (circuits) are used on each O2 sensor:
* 12-volt feed circuit for the sensor heating element
* Ground circuit for the heater element
* Low-noise sensor return circuit to the PCM
* Input circuit from the sensor back to the PCM to detect sensor operation


Hope helps (remember to rate and commene this)..

Feb 04, 2011 | 2004 Jeep Grand Cherokee

2 Answers

Where is the oxygen o2 sensor located on 2004 impala bank 1


I have a 2002 Impala with 3.8L, and just replaced my Bank1 O2.
It is located between the firwall and the middle of the engine, straight down past the spark plugs. Maybe 12 inches from the top of the engine.
As I recall the plug for the sensor is clipped to a bracket at about spark plug level.
I recommend using the crow foot style wrench to remove and install.

Jan 04, 2011 | 2005 Chevrolet Impala

2 Answers

After going over 40mph the check engine light goes on n it gives the code 440


How did you read that code on your car? A 92 Accord is supposed to give you pre-OBD honda codes, which are all below 100. Please check the code again and re-post it.

Jan 04, 2011 | 1992 Honda Accord

1 Answer

I have 2 codes showing on my 2004 chrysler sebring.? P2096 AND p0137. what do they mean and how do I know what parts to get to fix the problem.


P0137 O2 Sensor Bank 1, Sensor 2 Voltage Low
P2096 Down Stream Fuel System Bank 1, Sensor 2 Lean

There are 3 possible engines in your vehicle, a 2.4L 4-cyl, a 2.7L V-6, and a 3.0L V-6. If your car has a 4-cyl then there is only one downstream O2 sensor. This is where you need to start the diagnosis for code P0137.
While it would be nice to assume that the sensor is faulty, the sensor wiring between sensor and PCM could be the problem as well.
That said, you are looking for a DOWNSTREAM OXYGEN SENSOR. I strongly advise that the replacement be OEM compatable. Avoid Universal Replacement types that use **** connectors to make them work.
Good Luck!

Dec 29, 2010 | 2004 Chrysler Sebring

1 Answer

My check engine light has come on in my 2006 Pontiac G6 after 2 and a half years. What could possibly be wrong since I keep my car serviced and the guys had just told me that my car was in tip top shape?


P0016 - Crankshaft Position Camshaft Position Correlation Bank 1 Sensor A
P0030 - Heated Oxygen Sensor (H02S) Heater Control Circuit Bank 1 Sensor 1
P0031 - Heated Oxygen Sensor (HO2S) Heater Circuit Low Voltage Bank 1 Sensor 1
P0032 - Heated Oxygen Sensor (HO2S) Heater Circuit High Voltage Bank 1 Sensor 1
P0036 - Heated Oxygen Sensor (HO2S) Heater Control Circuit Bank 1 Sensor 2
P0037 - Heated Oxygen Sensor (HO2S) Heater Circuit Low Voltage Bank 1 Sensor 2
P0038 - Heated Oxygen Sensor (HO2S) Heater Circuit High Voltage Bank 1 Sensor 2
P0050 - Heated Oxygen Sensor (HO2S) Heater Circuit Bank 2 Sensor 1
P0051 - Heated Oxygen Sensor (HO2S) Heater Circuit Low Voltage Bank 2 Sensor 1
P0052 - Heated Oxygen Sensor (HO2S) Heater Circuit High Voltage Bank 2 Sensor 1
P0053 - HO2S Heater Resistance Bank 1 Sensor 1 (PCM)
P0054 - HO2S Heater Resistance Bank 1 Sensor 2 (PCM)
P0056 - Heated Oxygen Sensor (HO2S) Heater Circuit Bank 2 Sensor 2
P0057 - Heated Oxygen Sensor (HO2S) Heater Circuit Low Voltage Bank 2 Sensor 2
P0058 - Heated Oxygen Sensor (HO2S) Heater Circuit High Voltage Bank 2 Sensor 2
P0068 - Throttle Body Airflow Performance (PCM)
P0100 - MAF Sensor Circuit Insufficient Activity

Jun 25, 2009 | 2006 Pontiac G6

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

19 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

76164 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Randy Ohler

Level 3 Expert

14585 Answers

Are you a Car and Truck Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...