Question about 2001 Buick Century

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2001 Buick Century with code p1232 LF wheel speed sensor short or open. Have already replaced hub/sensor assembly, EBCM, and cut out old/spliced in redesigned harness as per tsb. Code continues to set intermittantly, please help. Odd part is, is that code sets to history yet still illuminates MIL. Never comes up as current code in scan tool.

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  • hedleylamaar Sep 05, 2009

    Oh sorry it is c1232

  • Car Fixer May 11, 2010

    Do you possibly have another, new code? So you're saying the MIL is lit up but there are no codes? I'm confused. Did you clear the codes after the repair was done?

  • yadayada
    yadayada May 11, 2010

    P1232 IS NOT A VALID ABS CODE, THE "P" IS FOP POWERTRAIN CODES

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  • Master
  • 436 Answers

Wire going to sensor breaks inside the insulation the plug may look ok by looking at it but if you grab hold of one wire at a time right where they go into the connector on the wheel sensors and give a good tug. If wire pulls away from the connector then it means that the connector is bad and wire was broken behind the insulation

Posted on Sep 05, 2009

  • daveherre1
    daveherre1 Apr 28, 2012

    I have the same car with the same problem. Replaced hub. Reset code after replacing hub. As soon as I take car out of park i keep getting C1232 Left wheel sensor shorted or open. It passed a continuity test from plug on wheel bearing to plug into abs. Why does this light keep coming on.

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Wheel speed sensors on 2003 Chevrolet impala being replaced multiple times. need updated information from gm.


Subject: Intermittent/Constant ABS MIL Illuminated (Replace Both Front Wheel Speed Harnesses) #03-05-25-008 - (10/01/2003) Models: 2001-03 Buick Century, Regal
2001-03 Chevrolet Impala, Monte Carlo
2001-02 Oldsmobile Intrigue
2001-04 Pontiac Grand Prix

Condition

Some customers may comment on an intermittent or constant ABS malfunction indicator light.

Cause

The front wheel speed sensor harness may wear or come into contact with the tie rod end stud. Additionally, the harness may, in some instances, loop over the tie rod stud. In this case, the wheel speed sensor should be examined for damage.

Correction

Replace original wheel speed sensor harnesses by splicing in revised wheel speed sensor harnesses. The new design harnesses are of a different length and have revised retention clip locations. Use the following procedure to replace the harnesses.
  1. Raise and suitably support the vehicle on a hoist.
  2. Disconnect the left wheel speed sensor harness from the sensor/bearing assembly.
  3. Remove the harness retainers from the lower control arm.
  4. Follow the harness back to the point where the harness enters the larger engine harness conduit.
  5. Cut the electrical tape and open the conduit. Select a location where the splice will be within the engine harness conduit. Cut the original harness off.
  6. Using GM/Packard Seal and Crimp Connectors, splice the two wires from the new harness to the old. Specific instructions for use of the Seal and Crimp Connectors are printed on the inside of the cardboard overleaf sealing the bag in which the harness is shipped. If Seal and Crimp Connectors are not available, you may use the crimp and solder type included with the harness kit.
  7. Retape the conduit closed making sure to create an effective seal against road splash.
  8. Route the replacement harness following the same path as the original. Fully seat the 4 retainers into the control arm.
  9. Caution!In the next step you will be required to measure the distance between the last retaining clip in the control arm and the end of the electrical plug that connects to the wheel speed sensor. Failure to properly perform this measurement and suitably adjust the harness may result in entanglement or infringement on the tie rod stud.
  10. Hold the end of the new electrical harness and stretch it firmly. Due to manufacturing tolerances, you will need to measure from the end of the plug (that attaches to the wheel speed sensor) to the rear edge of the first retaining clip. This distance must not exceed 24.7 cm (9.75 in). If the distance is equal to or greater than 24.7 cm (9.75 in), you must move the retaining clip to allow more slack at the control arm and less between the wheel speed sensor and the retainer. Repeat the measurement until properly adjusted.
  11. Disconnect the right wheel speed sensor harness from the sensor/bearing assembly.
  12. Remove the harness retainers from the lower control arm.
  13. Follow the harness back to the point where the harness enters the larger conduit.
  14. Cut the electrical tape and open the conduit. Select a location where the splice will be within the larger harness conduit. Cut the original harness off.
  15. Using GM/Packard Seal and Crimp Connectors, splice the two wires from the new harness to the old. Specific instructions for use of the Seal and Crimp Connectors are printed on the inside of the cardboard overleaf sealing the bag in which the harness is shipped. If Seal and Crimp Connectors are not available, you may use the crimp and solder type included with the harness kit.
  16. Retape the conduit closed making sure to create an effective seal against road splash.
  17. Route the replacement harness following the same path as the original. Fully seat the 4 retainers into the control arm.
  18. Caution!In the next step you will be required to measure the distance between the last retaining clip in the control arm and the end of the electrical plug that connects to the wheel speed sensor. Failure to properly perform this measurement and suitably adjust the harness may result in entanglement or infringement on the tie rod stud.
  19. Hold the end of the new electrical harness and stretch it firmly. Due to manufacturing tolerances, you will need to measure from the end of the plug (that attaches to the wheel speed sensor) to the rear edge of the first retaining clip. This distance must not exceed 24.7 cm (9.75 in). If the distance is equal to or greater than 24.7 cm (9.75 in), you must move the retaining clip to allow more slack at the control arm and less between the wheel speed sensor and the retainer. Repeat the measurement until properly adjusted.

Parts Information

Part Number Description 10340313 ABS Jumper Harness (01-03 Impala, Monte Carlo) -- Right 10340314 ABS Jumper Harness (01-03 Impala, Monte Carlo)-Left 10340315 ABS Jumper Harness (01-04 Grand Prix, 01-02 Intrigue)-Right 10340317 ABS Jumper Harness (01-04 Grand Prix, 01-02 Intrigue)-Left 10340318 ABS Jumper Harness (01-03 Regal, Century)-Right 10340316 ABS Jumper Harness (01-03 Regal, Century)-Left 12089189 Crimp N' Seal Double End Connectors (x4) Parts are currently available from GMSPO.

Warranty Information

For vehicles repaired under warranty, use:
Labor Operation Description Labor Time N6600 Wiring and/or Connector - Brake System/Traction Control - Repair or Replace 0.5 hr GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION © Copyright General Motors Corporation
This is a service bulletin that I found, I don't know if this is what you need?

Jun 27, 2017 | Chevrolet Cars & Trucks

2 Answers

What are the probable causes of DTCs C1226, C1222, C1221, C1233, C1232, C1291, P1106, and P1887?


DTC C1221 LF Wheel Speed Sensor Input Signal is 0
C1222 RF Wheel Speed Sensor Input Signal is 0
DTC C1226 RF Excessive Wheel Speed Variation
DTC C1232 LF Wheel Speed Circuit Open or Shorted
DTC C1233 RF Wheel Speed Circuit Open or Shorted
DTC C1291 Open Brake Lamp Switch Contacts During Deceleration
DTC C1291 detects an open brake switch. The EBCM looks for deceleration rates that may indicate braking action. The EBCM verifies braking action by repeating the method for finding deceleration rates that indicate braking action several times. In each case, the ABS will not be available because the EBCM does not see the brake switch input.
DTC P1106 Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage
DTC P1887 TCC Release Switch Circuit (3.4L)
DTC P1887 TCC Release Switch Circuit (2.4L)
The torque converter clutch (TCC) release switch is part of the automatic transmission fluid pressure (TFP) manual valve position switch. The TFP manual valve position switch is mounted to the transmission valve body. The TCC release switch is normally-closed.
The switch signals the PCM that the TCC is released. This is accomplished by torque converter release fluid pressure acting on the switch contact, thus opening the switch. When the voltage is high on the circuit, the PCM recognizes that the TCC is no longer engaged.
When the PCM determines that the TCC release switch is open (indicating that the TCC is not applied) and the TCC slip speed indicates that the TCC is applied, then DTC P1887 sets. DTC P1887 is a type B DTC.
You have all kind of problems , I suggest you take this to a qualified ASE certified repair shop that has the diagnostic tools to trouble shoot an repair the vehicle . Electrical testing is a must with open circuits an shorts ,plus hooking up a scan tool that reads sensor data .Not just a code reader like at the parts store . This video he has a Chrysler vehicle ,doesn't matter . Test is the same for all make an models !

How to test digital ABS wheel speed sensor

Sep 21, 2015 | 1999 Pontiac Grand Am GT

1 Answer

I HAVE A CODE C0265 ABS BRAKE. IT SAYS BAD GROUND CHANGED BOTH HELP? 2003 YUKON XL


GM states this code is for the ebcm electronic brake control module, I have replaced alot of these over the years the motors short internally and the entire assembly must be replaced. sometimes the main abs fuse will pop and you replace it only for it to pop again because motor in side is shorted to ground.

Aug 23, 2014 | GMC Yukon XL Cars & Trucks

1 Answer

Como puedo cambiar los sensores de la transmission de un 2002 trailblazer ls4x4


Vehicle Speed Sensor (VSS) Inside automatic transmission assembly.
Wheel Speed Sensor-LF On left front wheel hub assembly.
Wheel Speed Sensor-RF On right front wheel hub assembly.
Wheel Speed Sensor (WSS) - LR Attached to left rear wheel hub.
Wheel Speed Sensor (WSS) - RR Attached right rear wheel hub

Jul 08, 2014 | 2006 Volkswagen Jetta

1 Answer

I have a 2000 olds alero. I'm having a problem with the ABS, and Traction Control System. I've scanned the ABS system,and it shows RF wheel speed sensor ckt open/ shorted. I checked all fuses


The EBCM is looking for 1040-1160 ohms in the ABS sensor circuit. Check the two wires between the sensor and the EBCM. The wires in the area under the fender are prone to breakage caused by the flexing and turning of the suspension.

Mar 31, 2012 | Cars & Trucks

2 Answers

Can bad hub bearings make the abs and tc light to come on in a 2003 gmc yukon


Absolutely YES! The bearing and hub assembly contains the wheel speed sensor which is used by the Antilock Brake System (ABS) and the Traction Control (TC) system to see when a wheel is trying to lock up and cause skidding. The ABS will release the hydraulic pressure to the brake on that wheel and the traction control will reduce engine speed to prevent the wheel from locking up or causing you to spin out.
Many GM vehicles also commonly have problems with the wiring harnesses to the wheel speed sensors that can cause this same problem. The computer does not know WHY it cannot read the speed sensor signal. It only knows that it is not getting the signal and this is why the light is turned on. Before paying the BIG BUCKS for a wheel bearing and hub assembly, it would be wise to make absolutely certain that the problem is not being caused by a fault in the wiring harness. I have seen many mechanics automatically replace the wheel bearing only to find out that the problem still exists because they did not take the time to DIAGNOSE the problem. The fault code description says "Wheel Speed Sensor CIRCUIT fault." They see "speed sensor and automatically replace the sensor without actually checking the circuit. Not a problem unless you are the customer having to PAY for this type of guess-work!!!

There are wiring harness repair kits available for MOST GM vehicles just for this purpose.

I have included pictures of the bearing and hub assembly and the wiring harness kit to help you understand what we are talking about here.

Note the electrical connector sticking out of the hub assembly. This is the wires to the speed sensor. In the other picture, the connector at the end of the wiring harness is what plugs into the connector in the hub assembly. The other end of it gets spliced into the main vehicle harness in the engine compartment, after cutting the original harness out.

WHEEL BEARING AND HUB ASSEMBLY



dttech_40.jpg WIRING HARNESS REPAIR KIT

dttech_41.jpg

Aug 20, 2011 | 2003 GMC Yukon

1 Answer

2001 buick century is the front hub assembly abs


Yes. There should be a short wiring harness [a few inches long] with a two wire connector that comes out of the backside of the hub/bearing assembly and connects to the vehicle's wiring harness.

Apr 23, 2011 | 2001 Buick Century

2 Answers

What sensor lights will come on when a wheel bearing goes bad in a 2001 buick century custom


Hello mobrien.
Depending on what your car is equipped with. Antilock brake systems work in conjunction with traction control.So if the antilock system has a fault, traction control will also default system off. It may also turn on low pressure in a tire if your car has that feature.
In the bearing/hub assembly on your Buick there is a sensor ring that rotates with the axle. A sensor is positioned close to that ring to read wheel speed.
A failed bearing doesn't necessarily damage the sensor, nor will a bad sensor mean the bearing is bad. But on your vehicle if one fails the assembly must be replaced as a unit.
I hope this answers your question.If you have another leave it in a comment and I will answer you.

KL

Dec 05, 2009 | 2001 Buick LeSabre

1 Answer

2000 century anti lock light came on with service vehicle soon light also trac off light


Its most likely a bad front wheel bearing hub assy.. Get a scan on it and see if it comes back as a speed sensor on either the LF or RF... If so.. Its a bearing

Mar 11, 2009 | 2000 Buick Century

3 Answers

Buick rendevousz headaches


I own the 2002 Buick Rendezvous CX and I've encountered the same problems listed here. The ABS / Traction Control Lamp stays on and was throwing a code for the left wheel speed sensor as well as an anti-lock brake code (both in the wheel bearing hub assembly). I replaced the left and right front wheel hub assembly yet this did not eliminate the abs codes. 
Ultimately, I traced this problem to a break in the wire that leads to the left hub assembly. Although the sensor was properly connected, the wire (which is encased in a plastic housing) was broken. This is the wiring which leads from the abs wiring harness under the hood down to the left wheel abs sensor. 
I would suggest that you simply remove the left wheel and inspect the wire that leads to the abs sensor (there is only one wire on each wheel). Mine literally fell apart when I removed the plastic housing around the wire. I spliced the wire together and put it back in the plastic housing. After this, my abs codes disappeared and my anti-lock brakes began working again!
This is a simple fix that many people spend $1000 + on by replacing the hub assembly which does not fix the problem.

Aug 20, 2008 | 2002 Buick Rendezvous

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