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· Premium Member
1991 560 SEL, 1989 560 SEC EURO, 1989 560 SEL and 1985 280SE Euro
Joined
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451 Posts
Discussion Starter · #1 ·
Was measuring resistance on the coolant sensor for CIS-E. Disconnected and reconnected while engine was running as well as swapped in JY spare to see if any affect on rough hot engine idle - there was none. Apparently this exercise tripped on the check engine light. The LED Indicator on the X92 is solid on. Pressing the button next to the LED did not cause any blinking nor did it clear the CEL light. Tried this with ignition on engine off and engine on.

Seem to remember a scenario whereby starting the car with the EHA harness disconnected would trigger a CEL, could this be along the same lines?

what is the proper procedure for clearing CEL via x92 and retrieving codes if any?
is there a list of codes should I be able to retrieve them?

Thanks in advance for any info
 

· Outstanding Contributor
1989 560SEC, 1989 560SEL, 1995 E420
Joined
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5,693 Posts
There's a lot of info here and on the web for code readers and the code lists. I made my own code reader using one of the posts here. Then it's a simple matter to read and clear codes.
 

· Premium Member
1991 560 SEL, 1989 560 SEC EURO, 1989 560 SEL and 1985 280SE Euro
Joined
·
451 Posts
Discussion Starter · #3 ·
Did the research found the codes and cleared. To close this out, I had disconnected a squealing AIR pump. Reconnected and cleared the code.
 
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