New to TRS, but not new to Rangers - The dreaded P0102 Code on new to me 1996 Ranger

[flying_root]

Awesome link, thanks!

Tested fuel pressure yesterday to be in spec. Have to get back under and start testing wires.

 

[flying_root]

Tested a number of wires to be good, inspected more of the harness for damage, shorting out etc. Nothing. Broke down and ordered a rebuilt ECU. Plugged that in about a week ago and no more CEL. Engine runs/idles a little better and even shifts better.

Normally, wouldn't say an ECU is the cause of most CEL's, but guess in this case it was.

Oddest part about all the CEL's is we bought the Ranger with 1 CEL, the P0102, MAF error. It wasn't until after replacing the MAF the other codes started throwing, all O2 related. Guess after 29 years of service, the ECU wasn't 100% anymore?

 

[SenorNoob]

Definitely odd but not entirely unexpected. Electronic can do funny things when they get old...