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Code p0041 check engine light on

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SOURCE: Check Engine Light code is P0041 and states

this will probably be your cadalitic converter, i can't see why your impala would already have an issue with this, purhaps you have over 100,000 miles already or you use it for racing a lot (putting extra fuel in the exhaust will ruin a converter) reset it and see if you still have a problem, and if you don't fit either criteria above then you probably have a problem with an O2 sensor

Posted on Jun 14, 2010

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Rav 4 vvti 2000 petrol. P0041 code, signal swap? Could this be a wiring fault ie a short? as the oxygen sensors are ok - have been replaced with oe parts. Thank you in anticipation. Ken Baker


Last time I fixed this problem, I swapped the plugs for those two sensors. That is what that code is. When the sensors where replaced the plugs were swapped.

Jul 19, 2011 | 2001 Toyota RAV4

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Service engine light came on and has displayed code P0031 and P0041. What could be the problem?


P0031 is HO2S Heater Control Circuit Low Bank 1 Sensor 1 P0041 is O2 Sensor Signals Swapped Bank 1 Sensor 2/ Bank 2 Sensor 2

Jan 14, 2011 | 1994 Cadillac DeVille

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On my 1998 crysler sebring I am getting OBD II codes of 40 and 41,Transmission & engine module,any suggestions where to start? Thanks.


code 40-
Possible causes - 1/1 And 2/1 O2 sensors harness circuit shorted
- 1/1 And 2/1 O2 sensors harness circuit connectors (wrong connection)
- Faulty Powertrain Control Module (PCM) P0040 CHRYSLER Description At ignition on the Powertrain Control Module (PCM) checks the voltage on the ground side of the O2 sensor harness connector. If voltage is higher than two volts the P0040 code will set. code 41- Possible causes - 1/2 And 2/2 O2 sensors harness circuit shorted
- 1/2 And 2/2 O2 sensors harness circuit connectors (wrong connection)
- Faulty Powertrain Control Module (PCM) P0041 CHRYSLER Description At ignition on the Powertrain Control Module (PCM) checks the voltage on the ground side of the O2 sensor harness connector. If voltage is higher than two volts the P0041 code will set.

Dec 01, 2010 | 1998 Chrysler Sebring

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I have a 1994 Cad. Deville 4.9L that's cutting off when I drive for a while. It's getting a P041 code, but the car doesn't have a Cam Sensor on it. Does the Map Sensor work as the Cam sensor would, when...


P0041 is O2 sensor reversal. Check the back 2 O2 sensors on the exhaust pipes. Is it possible someone put the connectors on the wrong sensors? Try swapping them to see if it clears the code. It may take a day or 2 for it to clear. If it doesn't clear, please rescan and get back to us with any new codes.

Nov 04, 2010 | 1994 Cadillac DeVille

1 Answer

Check Engine Light code is P0041 and states secondary emissions systems problem.


this will probably be your cadalitic converter, i can't see why your impala would already have an issue with this, purhaps you have over 100,000 miles already or you use it for racing a lot (putting extra fuel in the exhaust will ruin a converter) reset it and see if you still have a problem, and if you don't fit either criteria above then you probably have a problem with an O2 sensor

Jun 14, 2010 | 2008 Chevrolet Impala

1 Answer

Check engine light


P0041 Downstream Oxygen Sensors Swapped From Bank To Bank
How does a P0041 code trigger the check engine light? This code will trigger the light to come on under the following condition:

The Heated Oxygen Sensor Monitor, a strategy built into the computer, determines if the Heated Oxygen Sensor (HO2S) signal response for a change in fuel trim corresponds to the correct engine bank. If a response from the Oxygen Sensor being tested is not indicated, a trouble code will be set and the MIL (Malfunction Indicator Lamp) will illuminate.
Possible Causes:
Crossed Heated Oxygen Sensor harness connectors
Wiring swapped from one Oxygen Sensor connector to the other
Wiring changed at the computer connection or in the related harness

Apr 09, 2009 | 1994 Honda Civic

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