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Old 02-27-2003, 01:40 PM
Arthur Dalton Arthur Dalton is offline
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Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,777
Re: 95 E320 codes 2,3,4,5?

Quote:
Originally posted by 95e320
I got the check engine light and pulled off these four codes from the LED. I can see that oxygen sensor might be bad as I've been suffering bad gas mileage, but what's 3,4,5 got to do with it?

Any suggestions?

Thanks
95e320
All other codes except 5 can be triggered by a faulty O2 sensor.

The secondary AIR system will pop the CE light because the system AIR check requires a proper lean reading from O2 sensor
to pass the ECU operation test. So bad sensor will show a fail condition on AIR ...
This system does not use Hot Wire Mas [ LH-SFI], but rather Hot Film Mas [ HFM-SFI]
The Egr fault is most likely a plugged EGR tube at the engine end of the EGR pipe.
Check archieves for other post on this common fault/repair...
[There was also a part change
on this year EGR for sticking valves]
An easy test is to supply vac to EGR with hand pump at idle and watch for poor idle w/vac applied... this means valve working and tube open..
Recommend changing O2 , erasing all codes and see if any come back after part change...
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