Q: Code c0040 ABS

asked by on February 14, 2017

The code c0040 keeps popping up and I replaced both front speed sensors
My car has an automatic transmission.

Hi there. Typically the Chevrolet unique code of C0040 is an indicator of an ABS sensor or module problem. You might want to review this video on how many mechanics diagnose the source of this issue and resolve it with a digital scanner.

Hello. General motors of that era have a high reputation for having a fault in the wheel speed sensor wiring harness. If the wheel speed sensors were replaced and both hubs appear to be fine then I would suggest carefully inspecting the wiring. A wheel speed sensor wire being broken or disconnected is a widespread occurence on your particular vehicle.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

My headlights are not working correctly - 1996 Chevrolet Blazer

Hi there. Most of the time this is caused by a bad headlamp switch. When the switch fails, it will cause this to occur. If the switch is fine, then it may have an issue with the headlamp relay. I...

How do I customize the Memory Remote Recall?

The Memory Remote Recall feature remembers the seat and side mirror settings that were last used by a driver, and returns to those settings when the remote keyless entry (RKE) transmitter is used to unlock the vehicle. To turn the...

After an Auto shop repaired my 2002 monte carlo ls 3.4L exaust manifold gasket and a tune up, ever since car hasnt been running?

Hello, thank you for writing in. Unfortunately your situation is going to require a second mechanic to inspect the vehicle. The biggest issue concerns the "tune up", as we do not know exactly what they did during that process. Tune...

Car riding rough over potholes and bumps

Hi there. If you have recently replaced shocks and struts, along with tires on your Accord, but still having a rough ride, it's possible that the stabilizer bar bushings are worn out and need to be replaced. It's probably best...

Oil is leaking in SUV, but source can't be found

Hello. You should start by checking the oil only when the vehicle has sat for about an hour to see if more shows up. If it does then you have a clog in the return holes in the engine. If...

My car shut off while driving and it won't turn back over

Assuming the engine is getting fuel with the new fuel pump, the next step would be to check for spark. The engine needs spark, air, and fuel to start and run. Air is almost always present, and again assuming fuel...

How do I inspect the seat belt?

It’s a smart safety precaution to inspect your seat belts every few months. It’s important to notice any potential damage to a seat belt early on, so that you can get it replaced. Even if a seat belt appears to...

Battery issues - 2013 Chevrolet Sonic

The battery may not be able to hold a charge because if the battery is dead. In order to check the charging system you will first have to have the battery charged and tested to see if battery needs replaced...

My car randomly shakes

The shaking you are feeling is likely a tire or suspension issue. As with diagnosing any problem, start with the simple solutions first. Make sure your tires are properly and evenly inflated. Make sure your tires are balanced properly....

Related articles

A Buyer’s Guide to the 2012 Chevrolet Suburban
The The 2012 Chevrolet Suburban offers large amounts of space to carry around a growing family or to transport supplies to your favorite camping spot. It is available in heavy duty and half ton models. Key Features The 1500 Suburban...
A Buyer’s Guide to the 2013 Infiniti JX35
Designed Designed for those who need plenty of seating capacity but don’t want to drive a minivan, the 2013 Infiniti JX35 hits the mark for luxury vehicles in its class. With innovations that chosen for their convenience and safety, this...
A Buyer’s Guide to the 2013 Chevrolet Spark
The The Chevy Spark nimbly walks the line between being functional and being totally adorable. In the spirit of mini cars past like the Ford Festiva and the Yugo, this spritely little creation offers improved safety combined with the tech...