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Error Code P0131

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Hello! I'm new to the forums.

Upon taking my 5 speed Manual 1998 Boxster out of storage I had the "Check Engine" light on. I've taken it down to get the error code checked out and it read "P0131." Is this a short to ground on the pre-cat converter for bank 1-3?

I have a few questions on this, and hopefully I can get a few suggestions from you all on what I should do.

Worst case senario is which? Replace the O2 sensor completely? How much would that part be roughly/what is that part number? and How much would I be expecting to pay if I was to take it to a Porsche Maintenance shop?

I was thinking of clearing the code and seeing it if comes back? How would I do that though? Can I do that via a gas petal ignition combination? or would I need to get it cleared via a plug in computer?

Thanks for your help, guys!


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P0131 Oxygen Sensor Ahead of Catalytic Converter (Cylinders 1 - 3) - Signal Wire Short Circuit to Ground or Incorrect Voltage

Possible causes:

Short circuit in signal wire to ECM ground or housing ground. -- When this fault occurs, DTC's P1ll5 and P1ll9 may also be stored in the memory, although these are not actual faults.

Short circuit of sensor ground to ECM ground or housing ground. -- When this fault occurs, all four oxygen sensors are always stored.

Output stage in DME control unit short to ground.

Note: If DTC P0131 is stored and faults in the sensor heating or in the remaining three oxygen sensors are also indicated, there is probably only one fault in one oxygen sensor.

I would erase the fault and if comes back - check the wiring on the pre-cat O2 sensor of bank 1. If the wiring is okay then replace the sensor.

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Roger! I'll give that a shot. This weekend I'll take a look, and then I'll see if I can get it reset. Bank 1-3 would be driver side correct? ( LHD )

How would I reset if I can't find a problem with the wiring? Will I have to take it back to a shop with a plug in computer?

Thanks for your quick response!


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