Question about 2005 Saturn Relay

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C0036 : Left Front wheel speed ckt, range performance

C0035 : Left Front wheel speed sensor circuit

C0040: Right Front wheel speed sensor circuit

These are the error codes that came up, for my 2005 Saturn Rely
my question is where is the wheel speed sensor circuit? how do I replace it?, what tools will be needed to do the repair.
Thank you

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It is part of the bearing hub assembly.Very have to do without air tools,If setting multiple abs/tc code (wheel speed sensors) probably abs electronic module or chaffed wires on drivers side at ac lines by air box.Have big problems with this and probably will come back.

Posted on Jun 17, 2009


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SOURCE: I pulled the codes and here they are : C0036, C0035, C0040

Sounds like you need front wheel speed sensors. Replace the wheel bearings and sensors. May have an ABS unit fault, but more likely is both wheel bearings/speed sensors.

Posted on Jun 10, 2009

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Hi, Have an 07 AWD Equinox, all stability control traction control, ABS, AWD, lights off, I've cleaned the ground ,all still on, now I have code c0040, c0899, wheel speed sensors are new, my scanner shows...

Do yourself a favor an take it to a qualified repair shop . You need a factory scan tool to see these code's
DTC C0040 00 : Right Front Wheel Speed Sensor Circuit No Additional Information
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DTC C0899: Device Voltage Low
Circuit/System Description
The electronic brake control module (EBCM) monitors the battery voltage level available for system operation. A low voltage condition prevents the system from operating properly.

Circuit/System Testing
Measure the voltage at the battery terminals.
With scan tool, read the battery voltage in the EBCM data list.
? If less than 10 volts, test the ground circuit of the EBCM for high resistance. If the circuit test normal, test or replace the EBCM.
Go to Battery Inspection/Test and Charging System Test .

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I don't think so? The first two codes are for left and right front wheel speed sensors. The last code is for abs system, the codes are all connected.
Make sure the wheel speed sensors are connected and clean. Just my opinion. Depending on the issue, you may need more diagnostics on the abs system?

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The wheel speed sensor produces an alternating current signal whose amplitude and frequency vary, depending on the velocity of the wheel. The electronic brake control module (EBCM) uses the frequency of the AC signal to calculate the wheel speed.

This wouldn't have anything to do with not starting ! Won't start how ? When you turn the key to the start position what happens ? Does the starter engage an spin the engine ? This would be a crank no start , now if nothing happens when you turn the key this is a no crank - no start .

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C0040 is ABS Sensor in right front wheel
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You most likely have a poor ground connection or a faulty EBCM (Electronic Brake Control Module) for these conditions. I recommend having someone run a diagnostic test at a shop. I doubt the ABS issue is stopping the truck from cranking.

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Abs code c 0036,front left wheel speed circuit range / performanc

I agree that it is more then like the the hub bearing assembly that also houses the speed sensor I would first check that there is no damage to the wiring that goes to the hub bearing that could be easy repaired, or debri that has been caked in between the sensor & the hub, use an air preesure to clean it out. Hub bearings are very expensive, so try this first. Good luck

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1 Answer

I pulled the codes and here they are : C0036, C0035, C0040

Sounds like you need front wheel speed sensors. Replace the wheel bearings and sensors. May have an ABS unit fault, but more likely is both wheel bearings/speed sensors.

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