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[neonomega]

hi every1 got another problem my engine light came on today and ive done a paper clip test and the codes i got was 38 Oxygen sensor circuit Voltage high  and code 91 Oxygen sensor heater Voltage high has any1 had these codes and how easy is it to sort out i hope to hear from some1

thanks brett

[rustym95]

Need to know engine and year to evaluate problem

[neonomega]

hi its a x20xev on a 1994 mreg
thanks

[rustym95]

try taking of the maf and see what codes come up then would say it is a false codes and the cranks sensor is on it way out, if 19 comes up on next test need a new cam sensor.

[neonomega]

hi sorry to ask what is a maf ?

[RobG]

hi sorry to ask what is a maf ?

Sits between airfilter box and throttle body, part of the black air piping http://www.omegaowners.com/forum/YaBB.pl?num=1155126173

[rustym95]

there is a box on the air pipe from the filter to the air carb with a plug on it pull that off and do the test again not the small one the one with a square top.

[neonomega]

ok cool i will disconnect it and do another test and i will reply tommorow night  with what codes it comes up with thanks for your help be back soon

brett

[neonomega]

hi ive just gone out and disconnected that air mass metre and done test and still got those 2 same numbers 38 and 91

thanks

[rustym95]

cam sensor then, it is the fails codes, need the cam sensor changing, engine in limp mode so turns off the maf and others. change the cam sensor the codes will go.
can try these http://www.vauxhall-car-parts.co.uk/acatalog/OMEGA.html

[neonomega]

hi ive changed that cam sensor restarted car and light came on again done a retest with paper clip and still got same 2 numbers i dont understand it at all ive recently changed the matrix i cant see that having anything to do with this problem ?

[rustym95]

also check all sensor plugs and give them a good clean, if its green give a clean.