Transmission in limp mode

DAVID SHEP68

MEMBER
2005 JEEP WRANGLER
4.0L
V6
4WD
AUTOMATIC
85,000 MILES

The vehicle started with a slipping feeling, then the chk engine light came on. The car went to 2 shops and had a battery installed and a tps installed and a second shop replaced the ignition switch. Now it is with me and I am #3. The codes are 0700,0122,0891,0562, tps volt high relay vol low and tcm sys failure. I am wanting to open the pan and go for pressure solenoid check. I have cleared the codes and they return. Removed all the exterior sensor clips and have got it shifting under easy acceleration. The light comes on immediately after moving and it is in 1st gear limp mode when it doesn't work. Waiting to try with cool fluid tomarrow. Any ideas?

2 Replies

JACOBANDNICKOLAS

MECHANIC
108,133 POSTS

Have you checked the trans control relay and wiring? The low battery voltage code could be the result of the control relay open or high resistance or control relay to PCM high resistance or open. Since the light comes on right away, my guess is there is either a wiring issue between the PCM and control relay or the relay itself.

At this point, nothing is pointing me in the direction of the pressure solenoid. Can I ask why you feel that is a suspect?

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Saturday, August 16th, 2014 AT 6:24 PM

DAVID SHEP68

MEMBER
3 POSTS

Hi thanks for your reply.
The relay has been replaced and the wiring harness checked
I am assuming it has to be internal and all the voltage codes are a result of some type of internal failure. The jeep has low miles and it isnt common for a harness to fail. I am a back yard mechanic and I have 4 transmission jobs here 3 to swap and this jeep. I dont think it is a total loss cuz it does shift. So far I can only check it while the engine temp has been at 210. I will check it in the morning when its cold but it should act the same as it had been in other shops and stii is doing bad. I just havent had it when cold yet. I want to check the filter and any selenoids I can see there. I wish it had a vaccume shift modual but its all electronic so I can only trouble shoot

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Saturday, August 16th, 2014 AT 6:40 PM