ABS light still on ??

Suspension, brake, and hydraulic/electric steering discussion.
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johnpz2721
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ABS light still on ??

Post by johnpz2721 » Fri Apr 05, 2019 2:59 am

Had all 4 bearings replaced new rear ABS sensors
Snap on scanner says rear sensors are bad
Any ideas ?

smwalker
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Re: ABS light still on ??

Post by smwalker » Fri Apr 05, 2019 3:13 am

Weird for both to go out at the same time. Check the wiring harness going along side the fuel tank. There is a connector at the side there. I would take it off there and make you you got the right ohms and continuity going to the wheels.
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'11 PPV 9C3 Huron White

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Mooseman
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Re: ABS light still on ??

Post by Mooseman » Fri Apr 05, 2019 1:55 pm

With that same scanner, can you get live data? Watch what the speed readings are for each wheel.

What is the exact code?
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johnpz2721
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Re: ABS light still on ??

Post by johnpz2721 » Fri Apr 05, 2019 8:22 pm

C0045 /C0044 symptom5a

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Mooseman
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Re: ABS light still on ??

Post by Mooseman » Fri Apr 05, 2019 8:51 pm

If you've already replaced the sensor, you should trace the wiring to that sensor as it could be a wiring issue. You'll need a schematic.

C0045 is left rear wheel sensor circuit. I'm not finding anything GM related to C0044.
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johnpz2721
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Re: ABS light still on ??

Post by johnpz2721 » Sat Apr 06, 2019 1:47 am

C0044 is a Brake pressure sensor C0044 Description The Anti-Lock Brake System (ABS) Module monitors the Brake Pressure Sensor 'A'. The ABS Module sets the OBDII code when the Brake Pressure Sensor 'A' is not to factory specifications.

Read more: https://www.autocodes.com/C0044.htm


Could this be a bad module ???

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Fudgehog
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Re: ABS light still on ??

Post by Fudgehog » Sat Apr 06, 2019 3:14 am

Could always try a brake pedal position relearn with a Tech2 scantool.
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Mooseman
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Re: ABS light still on ??

Post by Mooseman » Sat Apr 06, 2019 2:06 pm

johnpz2721 wrote:
Sat Apr 06, 2019 1:47 am
C0044 is a Brake pressure sensor C0044 Description The Anti-Lock Brake System (ABS) Module monitors the Brake Pressure Sensor 'A'. The ABS Module sets the OBDII code when the Brake Pressure Sensor 'A' is not to factory specifications.

Read more: https://www.autocodes.com/C0044.htm


Could this be a bad module ???
But if you scroll down that page, it doesn't give any info on GM vehicles. And Google searches for C0044 and Chevrolet or GM yields nothing.
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Mooseman
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Re: ABS light still on ??

Post by Mooseman » Sat Apr 06, 2019 6:31 pm

I was finally able to find this page for C0044:
https://obdii.pro/en/code/C0044
GM:
RF wheel speed sensor circuit open
For two circuits giving issues at the same time, I would suspect wiring.
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johnpz2721
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Re: ABS light still on ??

Post by johnpz2721 » Sun Apr 07, 2019 9:59 pm

Unfortunately it is !

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