davidmbell
08-09-2019, 02:57 PM
Hello all,
I have a 2007 Audi A4 B7 2.0Tdi Cabriolet - 140bhp - i believe this to be the BPW engine?
Got the Check Engine light on a few weeks ago. Didn't have chance to do anything with it, but a few days letter seemed to just go off again.
No real obvious symptoms? Although very ocasionally seems as if the power almost dips, and sort of feels like a missfire - tends to be when just feathering throttle to keep at a fixed cruising speed (say 50 zone on the M1!)
Anyway, scanned with my basic ELM scanner and a stored code of P0471 showed. So cleared/erased the code, and nothing more for a few weeks.
Till yesterday, when the CEL/MIL came on again, after a day of driving, and I'd just stopped for 20 mins and then restarted - the CEL/MIL light came on again. So, scanned again and same code.
A google search suggests its the Exhaust Pressure Sensor - but lots of things calling it DPF sensor. Now mine is of the age/engine size that it doesn't have the DPF, but it definately has this same sensor, mounted to tbe bulkhead back left of the engine bay.
Part no on it is "07Z 906 051A". I removed it and checked nothing obvious (cracked, full of crap, wires, hoses all ok etc)
Is it likely to be this sensor that's gone duff?
If I clear the error within a few engine stop/starts I see in my reader software a "PENDING" TROUBLE CODE P0471 - but the CEL/MIL light hasn't actually come on (yet)?
Do the symptoms sounds like it could be this sensor? Why would my car have this sensor if it isn't a DPF car?
Finally, I do also seem to get a very lumpy idle sometimes when coming to a halt - only for a few seconds the whole car seems to wobble and then it settles itself?
PS done 153,000 miles so no spring chicken!
ta,
David
I have a 2007 Audi A4 B7 2.0Tdi Cabriolet - 140bhp - i believe this to be the BPW engine?
Got the Check Engine light on a few weeks ago. Didn't have chance to do anything with it, but a few days letter seemed to just go off again.
No real obvious symptoms? Although very ocasionally seems as if the power almost dips, and sort of feels like a missfire - tends to be when just feathering throttle to keep at a fixed cruising speed (say 50 zone on the M1!)
Anyway, scanned with my basic ELM scanner and a stored code of P0471 showed. So cleared/erased the code, and nothing more for a few weeks.
Till yesterday, when the CEL/MIL came on again, after a day of driving, and I'd just stopped for 20 mins and then restarted - the CEL/MIL light came on again. So, scanned again and same code.
A google search suggests its the Exhaust Pressure Sensor - but lots of things calling it DPF sensor. Now mine is of the age/engine size that it doesn't have the DPF, but it definately has this same sensor, mounted to tbe bulkhead back left of the engine bay.
Part no on it is "07Z 906 051A". I removed it and checked nothing obvious (cracked, full of crap, wires, hoses all ok etc)
Is it likely to be this sensor that's gone duff?
If I clear the error within a few engine stop/starts I see in my reader software a "PENDING" TROUBLE CODE P0471 - but the CEL/MIL light hasn't actually come on (yet)?
Do the symptoms sounds like it could be this sensor? Why would my car have this sensor if it isn't a DPF car?
Finally, I do also seem to get a very lumpy idle sometimes when coming to a halt - only for a few seconds the whole car seems to wobble and then it settles itself?
PS done 153,000 miles so no spring chicken!
ta,
David