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OBD II getting code 89

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cdhowell Enthusiast

cdhowell

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98 Cherokee 4.0 automatic. Came in with a P0123 and a couple of 700 codes. I should have kept documentation on those but I didn't. Changed out a bad TPS test drove and cleared codes. 2 hours after the customer picks it up he returns. It is running rough and does not want to shift. We now have codes P0122, Tps signal low. P0123, TPS signal High. And 89 description unavailable. I have never seen a 2 digit code from Obd II.

 

Diag. on the codes say do the high first. Followed procedure to the point of replacing the PCM. I did with no changes. The low side proves the same TPS and circuit wiring and replaces the TCM. Which I am now reluctant to do. I believe what ever is causing this Mystery 89 code is the source of my problem.

 

Tech support for my OTC scanner say its a Chrysler code. Local Chrysler techs say not one of theirs. Any Ideas out there?

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Gonzo Grand Master

Gonzo

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Posted

98 Cherokee 4.0 automatic. Came in with a P0123 and a couple of 700 codes. I should have kept documentation on those but I didn't. Changed out a bad TPS test drove and cleared codes. 2 hours after the customer picks it up he returns. It is running rough and does not want to shift. We now have codes P0122, Tps signal low. P0123, TPS signal High. And 89 description unavailable. I have never seen a 2 digit code from Obd II.

 

Diag. on the codes say do the high first. Followed procedure to the point of replacing the PCM. I did with no changes. The low side proves the same TPS and circuit wiring and replaces the TCM. Which I am now reluctant to do. I believe what ever is causing this Mystery 89 code is the source of my problem.

 

Tech support for my OTC scanner say its a Chrysler code. Local Chrysler techs say not one of theirs. Any Ideas out there?

It's a glitch, not a real code or anything that I know of or found. Try clearing codes and see if it returns. Chances are it won't. Hope that helps. Gonz

cdhowell Enthusiast

cdhowell

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All the wiring proves out . No short to ground, power or each other. Good continuity. Good ground on all components. Solid 5 volts at TPS. 0.6v at idle from sensor 4.7 volt at WOT. No voltage drop from signal at PCM or TCM. And signal is clean and linear with a scope. Still I have codes for High and Low voltage. And this 89. I think there is a valid fault that is not being interpreted correctly by the scanner or PCM.

OEScanTools.com Explorer

OEScanTools.com

Posted
Posted

Try unplugging the Clock spring in the steering column for the Air Bag. It is an known issue on these Models that the Clock spring can affect the Ground for the TPS Circuit and it causes all kinds of drivability issues including P0122 & P0123 Codes.

 

I know it sounds stupid but just try it and report back to us and let us know what the outcome is.

 

Thanks

ATSAutomotive Collaborator

ATSAutomotive

Posted
Posted

Try unplugging the Clock spring in the steering column for the Air Bag. It is an known issue on these Models that the Clock spring can affect the Ground for the TPS Circuit and it causes all kinds of drivability issues including P0122 & P0123 Codes.

 

I know it sounds stupid but just try it and report back to us and let us know what the outcome is.

 

Thanks

 

Second this, if you have thoroughly tested everything else.

cdhowell Enthusiast

cdhowell

Posted
  • Author
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Sorry. Borrowed another scanner came up with a P1694. Changed out the TCM and It shifts now but still sputterrs with P0123 as the only code coming up. Had to push it aside for a bit and will be back on it today.

cdhowell Enthusiast

cdhowell

Posted
  • Author
Posted (edited)

Turns out that the tech. temped the TCM into place. Once properly installed and grounded the repair was complete. 89 was a code the scanner could not interpret. P1694 also leading to the TCM. Hopefully this helps some one else down the road.

Edited by cdhowell
mmotley Proficient

mmotley

Posted
Posted

I've seen 2 other cars before with modules not completely tightened down that was causing issues. Temping as a tech to partially put a car back together to verify repairs before completely reassembling...

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