These codes drive me nuts any OBD speccialist to help please

A

Ali

Member
Ho there i have the codes i changed the list bellow and no luck
Codes are P0121 and P02135 they come randomly at first start or cold start and go away if i restart the car they keep throughing the code at random times some time i see they dont come back my problem is at 4 low of i push the throttle the jeep wont go fast it takes 3-5 seconds ssluggish accelaration amd some times stall amd wont go but suddnly power come back and it goes ok
I changed
Throttle
Foot pedal
transmission pressure sensor
Cps looks good
Only these two codes appear from obd scanner
I need your thought please help thanks ad regards

jeep wrangler rubicon 2013
40” tires D44 axles 6.5” lift kit axle ratio 5.13 diablo tuner
 

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I've never replaced the TPS on a Jeep, but on several other vehicles I had problems getting the computer to accept the new throttle or TPS. I had to do the relearn or reprogram process several times before it would run right.

Good luck
 
I have done the relearn programing more then once it does through the code again and again at random times
 
I wonder if it could be a small short in the wiring... Simple test would be to "wiggle" the wiring for the TPS to see if that causes the codes to "pop". A more complex test would have you test that a constant 5 volts is being observed in the power wire to the TPS taking note when the voltage drop or (less likely) spike occurs that causes the codes to pop. To be very clear, I have not experienced this issue and am only offering mildly educated guesses at what else you can try...
 
Ali said:
I am on it the 5 volt of app 2
Click to expand...
Check your grounds. And if your running an AGM they have a low intrrnal ground resistance which the ecm can mistake for loss of ground then throw those codes. Also the pedal wires run through the connector toward the fender on your jeep pcm I would take it off inspect the connector, add dielectric then reinstal amd give it a go.
 
Greetings, I had P0121 with similar issues. It would rectify if I shut engine off then turned back on. Only to return again. I changed the PCV valve out and everything has been fine since. Jeep only had 40k miles on it, which surprised me the PCV valve was bad. PCV valve is a cheap part, so you might give it a try.
 
Colorado4 said:
Greetings, I had P0121 with similar issues. It would rectify if I shut engine off then turned back on. Only to return again. I changed the PCV valve out and everything has been fine since. Jeep only had 40k miles on it, which surprised me the PCV valve was bad. PCV valve is a cheap part, so you might give it a try.
Click to expand...
Hello there i will change it and report back its a crazy case it gives randomly at start up cold start some time it goes away no codes for weeks or days and some times its back again it drives me nuts
 
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