My 94 Merc has had an engine light come on when it warms up. It codes out with the #332 EGR valve not opening.I have the Haynes manual, so I've run through the books diagnostic testing procedure for the EGR system.
I tested the EGR valve with some vacuum, and it seemed to operate correctly. Also, I tested the vacuum solenoid and EGR valve position sensor per the manual, and they were OK. So, probably an error on my part, I replaced them one at a time, ending with the EGR valve. Still have the same code:
#332 EGR valve opening not detected
BTW, I have the OBD 1 diagnostic tool that I plug into the proper port to read the codes, and I clear the codes by unplugging the unit while it's in the midst of beeping the codes as per the Haynes manual.
Does anybody have any wisdom to shed on my issue?
The car runs great, no issues whatsoever. All gauges read fine...........I'm stumped............HELP!
Edited by gRon_Marqy (10/17/20 03:15 PM)
Edit Reason: spelling malfunction