what’s up guys? I just picked my car up from a local shop to have them try to fix my trifecta(ABS,DSC, BRAKE). I have replaced all four wheel speed sensors to no avail. The shop did a road test and tested all wheel speed sensor and found the front right speed sensor was reading 158mph constant. They jumped the wires that go to the ABS control unit and tested for resistance and came back at 1.8ohms. They then removed the left front harness, jumped wires that go to the ABS control unit to compare ohm reading which came back at 1.8ohms. They recommended me to replace the right front wheel bearing when they did they still had all three lights on the dash after doing a road test and clearing the codes. They then recommended me to replace the ABS module, but gave me a price of $1,400 which is definitely not worth it. I have found a used one from a member here and will have them reprogram the module. On my way home last night from the shop the car would not go into boost at all and sound like a misfire, but received no codes. When the car is at idle the rpm’s jump from 650-800 then level out. I did some investigating and saw that one of my vacuum hoses that’s connected to my forge recirc valve was bent and was not allowing proper air pressure to pass through. I replaced all the vacuum hoses and same problems occurred after I cleared all existing faults.

Codes are
2FF6 - VEHICLE SPEED SIGNAL;
5DF7 - INTERFACE INSTRUMENT CLUSTER SIGNAL FAULT;
5D8D - WHEEL SPEED SENSOR SUPPLY, FRONT RIGHT;
A8C3/4 - SECOND BRAKE LIGHT/ADAPTIVE BRAKE LIGHT LEFT/RIGHT;
A8BF - REAR FOG LIGHT/ADAPTIVE BRAKE LIGHT LEFT FAULTY
P0503 - VSS CIRCUIT A INTERMITTENT/HIGH

Let me know if you have had any problems like these would love to hear your opinions!

 

Hi - different engine than yours but the brake symptoms sound similar - see my recent post here solved by cleaning the ABS plug after swapping sensors etc etc

If that had not worked next step would have been to try testing the ABS stepper motor then consider shelling out for a recon/new ABS unit - try cleaning the multi plug first - much cheaper

 

awesome thank you so much for the help!

 

Yep, bad ABS sensor is most of it. or its dirty and cant read the wheel bearing. Watch on removal as those heads can snap in the knuckle.

https://www.northamericanmotoring.co...ndicators.html