Evening All,

Went back to this vehicle today after EML illuminated again plus EPC warning light flashing sporadically. Vehicle has not yet dropped into "limp" mode.

To confirm, the engine code is BAG

LTFT was 8.58%. Don't think that is too high.

Spark plugs changed to OE Bosch

Fault codes present:

P2201 NOX sensor circuit/range
performance. Presuming the NOX sensor has already been changed, I am assuming that the soft-ware upgrade has not been carried out.

P2138 Throttle Position sensor. Graphing the sensor found no gliches.

17413 Torgue difference cylinder 2. This is a new code although 16686 (cyl 2 misfire) was present last time. Understand this could be an injector or engine problem. Vehicle runs fine with no discernable misfire.

17443 NOX Signal implausable

18047 Pedal Position Sensor

16500 Coolant Temp Sensor. I understand this to be one of the two sensors which command one of the fans to run.

18354 Coolant fan

So there it hangs. Customer is going to have the software upgrade and see what happens as far as the NOX sensor is concerned. The Accelerator pedal sensor is going to be replaced. He will live with the coolant fan problem and see what materialises on cylinder 2.

Will let you know of any developements.

Thanks for all your interest and advice. Special thanks to James for the info on the motorised throttle body.

Regards

Pete M