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2004 Chevy Tahoe 4.8 4x4....abs light and parking brake lights are coming on throwing a C0237, replaced rear speed sensor at tcase, and throttle position sensor, still throwing same code and causing abs/parkinv lights on. Any suggestions? ??

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  • Expert
  • 49 Answers

There is a service bulletin about that code being caused by a faulty wiring harness

Posted on Nov 12, 2014

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Posted on Jan 02, 2017

  • 231 Answers

SOURCE: ABS Light and Parking brake light on

check your fuses, then check the ABS valve located beside the master cylinder and the wiring to it and finally check your speed sensor, which is located on the transmission on a 2 wheel drive and on the transfer case on a 4 wheel drive. but make sure hat your E-brake is released as it will cause these lites to come on.

Posted on Oct 09, 2008

  • 1 Answer

SOURCE: 2001 Chevy Tahoe with ABS & Brake light on.

I hope you have the problem fixed by now, but, it is the ABS control under the truck. You need to go under the hood and open the fuse box and disconnect the 60 amp fuse for the ABS, this will turn it off before it burns up. This however will also cause the traction assist off light to stay lit all the time. To the fix the problem you can pay tons of money ($700 or so) to have the dealership install a ABS control and the problem will happen again over time. Or, remove it yourself, go on ebay and ship it off to a guy who repairs them for about $150 and you will never have the problem again. Also, if you wrap your cable ends with plastic and protect them good, you can still drive you truck while the part is being worked on. It takes about a week.

Posted on Nov 24, 2008

  • 400 Answers

SOURCE: abs codes co281 & co265

the first of the two codes is for the brake light switch, the one that is under the dash attached to the brake rod and brake peddle. Not much to diag on that one, if its bad it's bad, and when it sets the code that means it's bad.
The second one is for the abs modual, it's under the truck on the drivers side. It is bolted to the top of the thing that has all of the brake lines going to it. MOST all of the time that code is set the modual is bad. It can be a little hard to get the bolts out they are torqs 20 or 25(i'm getting old). There are four of them holding down the modual. There are also a couple of connectors going to it. And some of the time it will blow the fuse for the abs under the hood(its in the underhood fues block). Make sure to clean off the modual before you pull it out. You don't want dirt getting in the solinoids for the BPMV(that's the thing it's bolted to).

Posted on Oct 20, 2009

  • 2 Answers

SOURCE: I have a 2004 Pontiac Aztek. The ABS brake light

hello i have a similar problem with my 2002 aztek the ABS light comes on only after my ABS system kick on when it is not suppose to (like normal braking conditions) i took it to be looked at at my local shop who also said it was a front hub having a bad wheel speed censor less than a week after having the work done the problem returned i took it back and they ran diagnostics on it for somewhere around 5 hr and could find nothing so they replaces the hub again.... no shocker here the problem isnt fixed still most recent time i had it in the tech said the problem is the cars computer is "loosing the wheel" he showed me where the main wiring harness runs right next to the oil pan along the bottom of the engine. the wires that go to the ABS control for that side are very swollen and the wires inside are loosing contact. they told me that i would have to replace the harness or live with the problem. after doing research the harness is no longer made and cost around $900 just for the part then u have to pay for the labor of someone putting it in
Hope this sheds some light on your problem

Posted on May 09, 2010

Testimonial: "Thanx for the feedback. I was told that it might be an electrical short somewhere within the wiring harrness however I questioned that if that was the problem, would it not occur right away intead of weeks after the hub replacement. I finally took it to my own mechanic and her stated that her did find the connection clip between the hub and the wiring harress had a loose prong so he tighted it. So far so good and I haven't experiend the problem since, however I am waiting for wet weather since the problem seemed to occur during during or right after a rain. Again thank for your help. "

alicantecoli
  • 22095 Answers

SOURCE: 2004 chevy tahoe abs light came on and front wheel

look at that wheel as the metal ring thing that makes the ABS work has come loose on the end of the drive shaft,just tack weld it back into position

Posted on Jun 23, 2010

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1 Answer

On a 2004 chevy tahoe How do you test to see if the instrument cluster abs and parking brake lights need to be replaced.


They are in a closed loop the ABS and the balance pressure switch. You likely have some kind of problem with ABS system .If one dosn't work it will effect the other light

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Abslight stays on. How to fix? This is a2007trailblazer?


First you need to have EBCM - electronic brake control module check for DTC'S - diagnostic trouble code's . If the light is on there is a code stored . I think most part stores can do this and for free . After you find out what code is stored , looking up that code in service repair information for diagnostic trouble shooting chart would be next step . There are a few codes too.
DTC C0035 or C0040
DTC C0045 or C0050
DTC C0110
DTC C0131
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Find the code do the diagnostic's , fix the problem , wiring issue's , a sensor , bad module ,what ever it is . The light will go out then . Here is a sample of code discription .
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2004 chevy tahoe instrument cluster (parking brake & abs lights don't come on at all. There are no codes either. Are there specific fuses associated with these bulbs in the instrument cluster?


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What will make my truck shut off while driving. The truck runs well, will shut off without indication. I can start it back in neutral or park, sometimes it will turn over once or twice then start.


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wheel sensors ..dirty or insulation cracked

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1 Answer

What are the probable causes of DTCs C0222, C0226, and C0237?


Brent, Check and clean connections(use electronic contact cleaner), make sure wires are not damaged. Check grounds from EBCM controller. Check links below and don't be afraid to google search for more info.
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C 0226 Missing Left Front Speed Signal
- Faulty Right/Left Front Speed Sensor
- Right/ Left Front Speed Sensor harness is open or shorted
- Right/ Left Front Speed Sensor circuit poor electrical connection
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How fixed Chevy with an Abs and Brake light on

https://www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0ahUKEwi0i8zz5YzLAhWD74MKHffwDLQQtwIIITAC&url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DR_5WZUebDx8&usg=AFQjCNHimqe_Fje8AySjD5N0Wh8z8dQuuw

How To Install Replace Front ABS Sensor and Harness 2000 06 Chevy Suburban...

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1999 chevy 1/2 ton brake light codes codes c0237 & c0281


A c 0237 is a faulty rear ABS SPEED SENSOR .....the Code C 281 is a faulty BRAKE SWITCH CIRCUIT....Speed sensors can sometimes get out of adjustment or a bad connection which can also trigger the Brake Switch Circuit Code....Inspect all brakes and sensors....Brake fluid level......I can help walk you through troubleshooting the problem......Thanks....

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I have an 2004 Chevy Tahoe 4x4 4.8l with code c0237. How hard is it to replace the throttle position sensor?


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Nov 11, 2014 | 2004 Chevrolet Tahoe

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Co237 and co267 for 2003 chevy trail blazer


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1999 Chevy Tahoe 4dr 4wd. Brake light comes on when pedal is slightly pressed then off again when pressed in more then on again when fully pressed.. Has a new switch and the problem occured before a new...


Hi


To start with check the Speed Sensor on the front and rear. Usually the issue is with the rear speed sensor which can be replaced easily and will cost you around $25-$40.
There is a sensor at the top of the rear differential for the ABS system. When the ABS sensor on the diff goes bad the Speedo no longer will work, the odometer stops recording mileage and both brake and ABS light comes on. You also loose O/D or "Lock-up" in the torque converter. The sensor is inexpensive and can be changed in about 30 mins.
Replace rear differential speed sensor as follows:
a) Remove parking brake cable bracket (1/2" socket)
b) Remove speed sensor bolt (9/16" deep socket)
c) Remove metal speed sensor cover
d) Remove speed sensor from rear differential housing (use channel lock pliers, twist gently back and forth while applying upward pressure. Once the speed sensor has a small gap between it and the rear differential housing, insert a flat-blade screwdriver and gently apply upward pressure while gently twisting speed sensor back and forth.
e) Disconnect speed sensor from speed sensor cable
f) Lubricate new sensor with WD-40, insert into rear differential housing. It will NOT go in all the way by hand, so do NOT force it nor hit it with anything made out of metal.
g) Replace metal speed sensor cover
h) Insert speed sensor bolt and tighten LIGHTLY until a small amount of pressure is felt. Tap speed sensor with rubber hammer until it pops into housing. Finish tightening of speed sensor bolt.
i) Replace brake cable bracket, replace 1/2" nut and tighten
j) Disconnect positive battery cable for 2 minutes, reconnect positive battery cable

Please do accept the solution if the issue is resolved or else revert for further assistance.


Thanks
Rylee

Jan 21, 2010 | Chevrolet Tahoe Cars & Trucks

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