Impala C0035, C0040, ABS, TCS

Diagnose and fix Impala C0035, C0040, ABS, TCS

GM has issued a service bulletin PIC5992A regarding a C0035, C0040, ABS TCS issue on the vehicles listed below.

2007 – 2013 Chevrolet Impala

2014 – 2016 Chevrolet Impala Limited

2007 – 2008 Pontiac Grand Prix

2007 – 2009 Buick Lacrosse

Description of the ABS light on or TCS light on problem

You may notice the ABS light on or TCS light when turning. GM has identified a possible wiring harness issue running to the wheel speed sensors. The sensor or wiring issue may cause unwanted activation of the ABS system which you’ll feel as a rapid pulsing when slowing down on dry pavement.

The wire damage occurs inside the insulation and cannot be found with just a visual inspection. GM recommends running your fingernail down the wires until you notice a open area. Checking with an ohmmeter may not find the open since this is an intermittent condition.

How to diagnose C0035, C0040, ABS, TCS

Read the stored trouble codes first. When a wheel speed

Wheel hub with integral wheel speed sensor

sensor or wiring harness fails, you will see a chassis related trouble code. The trouble code will point you in the direction of which sensor or harness is causing the problem

C0035 00 Left Front Wheel Speed Sensor Circuit No Additional Information

C0035 0F Left Front Wheel Speed Sensor Circuit Erratic Signal

C0035 18 Left Front Wheel Speed Sensor Circuit Signal Amplitude Less Than Minimum

C0035 5A Left Front Wheel Speed Sensor Circuit Signal Plausibility Failure

C0040 00 Right Front Wheel Speed Sensor Circuit No Additional Information

C0040 0F Right Front Wheel Speed Sensor Circuit Erratic Signal

C0040 18 Right Front Wheel Speed Sensor Circuit Signal Amplitude Less Than Minimum

C0040 5A Right Front Wheel Speed Sensor Circuit Signal Plausibility Failure

C0045 00 Left Rear Wheel Speed Sensor Circuit No Additional Information

C0045 0F Left Rear Wheel Speed Sensor Circuit Erratic Signal

C0045 18 Left Rear Wheel Speed Sensor Circuit Signal Amplitude Less Than Minimum

C0045 5A Left Rear Wheel Speed Sensor Circuit Signal Plausibility Failure

C0050 00 Right Rear Wheel Speed Sensor Circuit No Additional Information

C0050 0F Right Rear Wheel Speed Sensor Circuit Erratic Signal

C0050 18 Right Rear Wheel Speed Sensor Circuit Signal Amplitude Less Than Minimum

C0050 5A Right Rear Wheel Speed Sensor Circuit Signal Plausibility Failure

Next, inspect the front wheel speed sensor wiring harness where it passes between the knuckle and the axle for signs of chafing, wear or water intrusion.

Replace the damaged part

©, 2017 Rick Muscoplat