IAT good, Jeep still shows bad IAT

Tiny
SNAPPER RANCHERO
  • MEMBER
  • 1995 JEEP WANGLER YJ
  • 2.5L
  • 4 CYL
  • 4WD
  • MANUAL
  • 100,000 MILES
I've been getting a 23 code from my check engine light, and have tried replacing my IAT (MAT in my Haynes Manual) with another one pulled from salvage and a new one. I've also done the test ( IAT Sensor on the Jeep Wrangler YJs are easy to test and replace. ) And feel reasonably certain that the IAT sensor is not the problem. I also tried to clear my codes by disconnecting the positive battery terminal and letting it ground out for for a while. If it's not the IAT, what would be the next thing to check? I'm not throwing any other codes except the usual - 12, 33 then 23 then 55. Thanks for any help
Wednesday, December 17th, 2014 AT 8:20 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Wiggle the harness at connector and see if light goes out it may be a shorted wire could also be a bad pcm. See pic for testing
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Wednesday, December 17th, 2014 AT 12:32 PM

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