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'95 E320 (W124) CEL code=4
I have a '95 E320 wagon with 146K. The check engine light just came on and I'm getting a code 4 from the diagnostic module ==> Air injection system faulty hot film mass air flow sensor with hot wire
Two days before the light came on I replaced the air filter and switch-over valves for the EGR and air pump. I've reset the code twice so far and no other codes are being stored. I haven't read codes from any other modules yet.
Should I assume the MAF is faulty or can it be cleaned and/or tested?
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