pnwguy
Junior Member
- Joined
- Jul 20, 2021
- Posts
- 12
- Reaction score
- 0
- Location
- Washington State
- Ram Year
- 2011
- Engine
- 5.7 Hemi
Hey y'all. I've been trying to solve this one for a while to no avail. I suspect it might be something involving the ABS or wheel speed sensor, but I'm not sure.
Symptoms:
Traction light won't turn off
Traction control doesn't seem to work/works intermittently
Serv 4WD light turns on intermittently
P0571 code won't clear
Occasionally stuck in park (so far hasn't happened since brake switch adjustment, which was only this morning)
Other symptoms:
Sagging e-brake cable
Hemi tick (possible undetected misfire causing insufficient vacuum?)
So far I've tried:
New brake switch
Adjusting brake switch pin length
Clearing codes and disconnecting negative battery terminal for 15 minutes
Checking wheel speed sensors for loose connections
Probably unrelated, but I took it into Les Schwab for an ABS diagnostic. They told me the brake booster rod won't return to the correct position and needs replacing, as well as full brake job. I diagnosed the brake booster following the instructions in the service manual and it appears to be operating correctly. However, right before pulling into the lot, the brakes tightened up and wouldn't let go. I hit the calipers with PB Blaster and they seem fine now. I can't detect any problems with the brakes while driving.
Also, cruise control wasn't working but it appears to be working fine after replacing and adjusting the brake switch. 4WD also appears to work correctly, even while Serv 4WD light is on.
Does anyone have any ideas?
Symptoms:
Traction light won't turn off
Traction control doesn't seem to work/works intermittently
Serv 4WD light turns on intermittently
P0571 code won't clear
Occasionally stuck in park (so far hasn't happened since brake switch adjustment, which was only this morning)
Other symptoms:
Sagging e-brake cable
Hemi tick (possible undetected misfire causing insufficient vacuum?)
So far I've tried:
New brake switch
Adjusting brake switch pin length
Clearing codes and disconnecting negative battery terminal for 15 minutes
Checking wheel speed sensors for loose connections
Probably unrelated, but I took it into Les Schwab for an ABS diagnostic. They told me the brake booster rod won't return to the correct position and needs replacing, as well as full brake job. I diagnosed the brake booster following the instructions in the service manual and it appears to be operating correctly. However, right before pulling into the lot, the brakes tightened up and wouldn't let go. I hit the calipers with PB Blaster and they seem fine now. I can't detect any problems with the brakes while driving.
Also, cruise control wasn't working but it appears to be working fine after replacing and adjusting the brake switch. 4WD also appears to work correctly, even while Serv 4WD light is on.
Does anyone have any ideas?