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ABS fault codes

malc350

Well-known member
Joined
Jul 6, 2002
Messages
337
Location
Essex, UK
Corvette
1996 LT-4 Z51 CE
My SERVICE ABS light came on and my diagnosis revaeled the following fault codes:

Code 31: Right Rear sensor fault
Code 25: Left Front sensor fault

I can't believe that both sensors would fail at the same time(!!!)

I have checked the resistance of both sensors as per the factory manual. The Left Front is within specification but the Right Rear resistance is much higher than it should be.

I suspect that only the Right Rear sensor is faulty. The main reason is that the codes are displayed in the following order:

Code 31, Code 25. I thought the codes should be displayed in numerical order (?) I am guessing the current codes are displayed first, followed by history codes and therefore my Left Front sensor code (25) is a history code?

Anyone know if I'm right? Help appreciated.

Malc350 (Essex, UK) 1990 Callaway Twin Turbo, black on black, 6 speed, 3.33:1 rear.
 

Rabbit

Well-known member
Joined
Dec 19, 2001
Messages
956
Location
sonoma ca usa
Corvette
2004 C5 coupe, MSGM & 2014 Cad SRX Crystal red
I believe history DTC"S are preceded by an "H"...............
 
F

fast90

Guest
Funny you post this. My 90 (not Callaway...sniff) has been getting the ABS light too for past month. The codes I've gotten indicate the passenger front wheel and driver rear wheel. The mechanice cleaned the sensors, checked the resistance and reset the ECM. I'm still getting ABS light about 85% of the time. Every now and then, I'll hear what sounds like a small motor running in the driver rear wheel, then the ABS light goes on. Other things that have turned the light on are when I'm jumping on the gas and shifting between 1st, 2nd or 3rd.

I have no idea what I'm in store for here. Car isn't going back in to the mechanic until next week. I'll be ****ed if I need a new ABS module seeing how I've only had the car for 6 weeks.

Keep me posted on your troubles!
 

malc350

Well-known member
Joined
Jul 6, 2002
Messages
337
Location
Essex, UK
Corvette
1996 LT-4 Z51 CE
Thanks for your reply. I can't believe someone has the same (weird!) problem. I've ordered a new right rear sensor that should be with me in a few days. I'll see if that does the trick. Malc. See: www.mm-2000.co.uk/corvette
 
F

fast90

Guest
:BOW nice ride ;worship i have always admired the callaways. just wish i could afford one :(
 

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