fault codes

[ste porter]

ok just read the fault codes of on the ecu from the c20xe they are

21.............tps (throttle position sensor) high voltage
74.............afs (air flow sensor/meter ) high voltage
57.............iscv(idol control valve ) interuption
16.............Knock sensor no change in signal
48.............battery low voltage
31.............Crank sensor no signal


is there something daft that can have caused all these things and by fixing that will resolve them all or are they not linked in any way and the only way of fixing them is bit by bit

any surgestions on how to fix any of the above much apreciated thanks oh and asap please as i want it running tip top asap cheers

[Adam]

High voltage is perhaps a earth problem.
Crank sensor will show if the engine isn't running.
Sounds like you've got a duff battery too.

Not sure what the iscv interuption means tho.

[SRI crazy]

is there n e problems with the car or r they jus they

[rysmee]

fault codes can be very deceiving as sensors can throw up codes essentially caused by other things, throwing you off the scent of the root cause.
Best thing to do is to jot down all the codes you have then delete them.
The codes that then re-occour are the place to start. All the sensors can be tested using the figures given in the haynes, so if you have 'tps high voltage' then grab your multimeter and check what your tps is giving out etc etc. The battery voltage/charging circuit is easy enough to check, and hopefully from here you can find the source/ sources of the engine running poorly.

[ste porter]

sorted now cheers was earths and battery