\'95 E320 (W124) CEL code=4

02-02-2005, 01:12 PM

Glen

...auto enthusiast

Join Date: Sep 2000

Location: Carlsbad, CA USA

Posts: 1,187

'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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Glen Tokuhara
Beauty & the Beast and the wagon that could!

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