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2006 Corsa warning light
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Hi folks. Had car pass MOT ok last week, however the yellow emmisions warning light has now come on & stayed on, had lot of rain last few days & someone mentioned water getting into exhaust could cause this ?
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Without knowing what the specific code stored in the ECU it's hard to know for sure what the actual problem is, but it could be one of a few things.
A few common ones are:
MAF or Mass Air Flow sensor is faulty.
A Lambda or O2 sensor in the exhaust is faulty.
Or the wiring to each of the above is faulty.
An air leak in the induction side after the MAF.
Leak in the exhaust or exhaust manifold. (owners can get a similar problem if they fit free flowing sporty exhausts).
You really need someone to read the ECU with a scan tool, get the diagnostic trouble code/s and more importantly understand what they mean to help fix it.