faulty sensor

[Tigerryes]

Hi can anyone tell me which sensor or location is an 02 sensor bank 1 sensor 1
error codes P2231 and P0131 occational limp mode but an obd2 can clear and returns to normal. DPF doesn't appear to be blocked. no black smoke, no loss of power or reduction in fuel economy
want to get the right one changed instead of garage hit and miss.

[GiveMeABreak]

Pop your VIN up first please (automasked on post submission)

[Tigerryes]

Pop your VIN up first please (automasked on post submission)

VF3**************[VIN obfuscated, can be read by forum staff]

[GiveMeABreak]

Here are the fault code descriptors for you.

If you are referring specifically to the Oxygen sensor, there is only one on this engine, shown at (2):

Fault Code:
Description of Fault:P2231	Oxygen sensor: Integrated slave circuit of the sensor faulty. Electrical fault in the oxygen sensor detected for 5 seconds.
Conditions for Fault to clear:	Driving with the engine hot for 5 minutes.
Downgrade Modes whilst Fault is active:	-
Symptoms:	Excessive fuel consumption
Suspect Areas:	Oxygen sensor Connectors Electrical harness

Fault Code:	P0131
Description of Fault:	Oxygen sensor: Short circuit to earth. Voltage less than 0,5 V for 100 ms.
Conditions for Fault to clear:	Driving with the engine hot for 5 minutes
Downgrade Modes whilst Fault is active:	-
Symptoms:	Slightly higher fuel consumption
Suspect Areas:	Electrical harness Connectors Oxygen sensor Engine ECU

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[Tigerryes]

thank you very much Marc, appreciate your help. and how did i know it was going to be at the back of the engine, just typical. guess i either bite the bullet at the garage or scap the dam thing
mind you it does very well on fuel, normall 51 mpg

[GiveMeABreak]

It's only 41CM long, so should be easy enough to replace once you get to it and there's no programming or initialisation for the new sensor to worry about either.

[Tigerryes]

ty Marc. i'm guessing to disconnect battery first lol wish me luck

[GiveMeABreak]

Just follow this to be safe:

BSI Reset / Battery Disconnect / Reconnect Procedure

[Tigerryes]

Thank you for the heads up marc. I've investigated where it should be located from your picture. I found it, think i might have to take it to my garage as there is no way we can do it. I struggle under the car this will have to be a ramp job. Just hope they are kind as the pension is pretty stretched now and the part is 97 +vat.