hi ppl i used a diagnostic tester yesterday with the engine managment light which came on an came ack with these faults to do with fueling becoming lean in engine. has anybody had these fault codes an if they did what did you do to fix it. thanks for replies.
jay

 

Pre-cat lambda sensor faulty most likely. Quite common for these to fail on the st170.

 

Hi mate thanks for the reply but if it was to be faulty would the car show up the code 0135 I think that the code. I've checked around an can't find vacuum leaks, checked maf. I can feel the car lose power once it warm. Confused. The car had both lambas replaced in 2010

 

Also the car tends to just lose power at times when warm and got roughly 28 miles to £10 worth of fuel @ 1.33pl. Hoping it is the sensor. Anybody know best place to get precat sensor?