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Author Topic: fault codes 57,71 and 131  (Read 648 times)

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MV6Man

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fault codes 57,71 and 131
« on: 07 October 2010, 16:25:14 »
Bought an omega few days ago.
It's a 2.5 petrol -00.  If i take ground wire off from battery and start car after that, em light don't appear before i give some revs.. Idle is a bit low approx 500rpm.

Any ideas where to start?
Codes taken with paperclip...
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Welung666

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Re: fault codes 57,71 and 131
« Reply #1 on: 07 October 2010, 16:44:12 »
57   Idle Air Control Voltage Low
71   Intake Air Temperature Voltage High
131   Exhaust Gas Recirculation (EGR) Valve Feedback Voltage High

Forget taking the battery lead off as it won't reset the codes. Clean the IACV (front corner of the plenum) and clean the EGR (back of the 246 bank).
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MV6Man

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Re: fault codes 57,71 and 131
« Reply #2 on: 15 October 2010, 19:50:38 »
Problem solved, knock sensor wiring was causing this...
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