4 replies to this topic

[Soren]

Today my engine light came on in my Speedster Turbo. My code reader gave me a code P0141, which I can see is most likely related to the post cat lambda pre heater.

 

A few questions:

• Will I be facing big trouble if I drive with this fault? I have booked my mechanic 10 days out for some other stuff to be made (till then will put about 400km extra on it with my daily commute). Will I potentially damage the cat, or other parts of the engine/exhaust system? I have a standard exhaust/cat.

 

• Is there a way to check the sensor without stripping off panels etc? Honestly I have no idea of where it is attached to the harness, -is there a place where I can check the resistance on the plug (if someone has a picture, that would be really good help)?

 

Thanks!

Søren

[hairy]

Hi Søren

 

I wouldn't be able to advise whether to drive that distance, but the O2 sensor plug is in front and below the header tank:

 

 

Good luck, Hairy

[Soren]

Cleaning the ECU GND connection and checked fuses in the back, wriggling the connector (if the right one..)

 

I have tried to clear the fault. The code doesn't show again (at least so far). I believe the sensor is checked continuously? The code should come back on if the sensor is faulty?

[smiley]

Yes, if it is really broken, it will come back.

If one time fluke then not.
When you have wire damage, it will trigger the eml emmediatly.
If it is the sensor part it can take longer.

Without postcat info, the ecu will just chuck in some more fuel to be sure. That's it. 

[Notalotus]

Isn't the post cat lambda the one prior to the back box that can be seen behind the rear left wheel? If the first cat at the manifold has been replaced with a de-cat pipe similar eml warnings show up.