Limp mode only after reverse

Tiny
JOHN CARROLL2
  • MEMBER
  • 2008 CHRYSLER PT CRUISER
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 120,000 MILES
So, my car only goes to limp mode after going in reverse to back up then after I shift back to drive it will go into limp mode almost every time. I have to cut the car off then back on again to get out of limp mode. As long as I do not go in reverse, it will never go into limp mode, only after reverse. This has to be a simple problem! I just cannot figure it out! Does the PCM need to be retrained? Is there a backup sensor that messes with the other sensors and put it in limp mode? Is it the natural safety switch? I have changed the fluid and filter. I have changed both input and output speed sensors. I have also changed the shift solenoid. Please help!
Thursday, June 21st, 2018 AT 8:58 PM

3 Replies

Tiny
HARRY P
  • MECHANIC
  • 2,292 POSTS
The fact that it is going in to limp mode means that the transmission computer is setting one or more trouble codes when you put it in to reverse. Take the car to the local Aamco and have it scanned. Get the trouble code(s) and report back here. Then we will be able to really get you some good information, and not just guess at it.
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Friday, June 22nd, 2018 AT 4:43 AM
Tiny
DELSTIGJOE
  • MEMBER
  • 1 POST
Did you ever find a solution to this? I am experiencing the same issue.
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Sunday, May 12th, 2019 AT 8:05 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,347 POSTS
Hello,

This sounds like a speed sensor issue. To be sure lets run the codes to see what comes up.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please run down this guide and report back.
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Wednesday, May 15th, 2019 AT 1:52 PM

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