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1999 Audi A4

Tiny
1ROMIK
  • MEMBER
  • 1999 AUDI A4
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 103,000 MILES
I am really fed up with this car at this point. I have scanned my car to find some codes on what coud potentially be the problem, and it said it was the oxygen sensors. Well, I have replaced the sensors several times, and my problem still remains. And now the code thats coming up is P0131, could you please help me into trying to figure out with whats wrond with my vehicle? Could it be the engine computer? Please help

Thanks in advance
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Saturday, August 29th, 2009 AT 6:23 PM

1 Reply

Tiny
DUBTECH
  • MECHANIC
  • 159 POSTS
The code is for the B1S1 O2 sensor. Assuming the sensor is OK since it's been replaced, you'll need to check the wiring harness between the sensor and the ECU. You'll also need to check the fuse(s) for the O2 sensor heater circuit.

If all those check fine the next step (as per the factory service manual) is to replace the ECU.
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Monday, August 31st, 2009 AT 2:14 PM

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