Engine wont idle, have to keep foot on gas to keep it runnin

erock359 · Post by **erock359** » 14 Jul 2012, 11:43

I have a 2002 v40, that all of a sudden wont run unless you keep the accelerator pressed.
the check engine and service soon light popped on immediately . I checked the codes and they are
P0508
P0245
P0031
P0037
P2401
I removed the idle air control and sprayed cleaner in that and it moves up an down, but still wont stay running unless you press the gas.
I seen on here were a guy had exact same codes on a s40 and he said that it was a 2in in diameter hose coming from intake air cleaner with a PCB circuitry in it which fixed his problem. i don t see such a hose and dont know what the pcb is, googled it and they don't seem to know either, any help would be appreciated.

keithatcpt · Post by **keithatcpt** » 16 Jul 2012, 09:45

Googling the codes, looks like you need, at the very least an 02 sensor pre-catalytic converter.

Possibly a mass air flow sensor (MAF) too.

A pcb is a "Printed Circuit Board". The only circuitry on the 2" hose from the air cleaner is the MAF.

Looks like something is wrong with your wastegate solenoid and your evaporative emissions control as well. Google the codes yourself and try and get a sense for what might be the common factor on your car. See if all the wires run together for these things; it could very well be a damaged wiring harness, not the sensors themselves.

- Keith