What Does the Engine Code C0035 Mean?

Error code C0035 indicates an issue with your left wheel speed sensor, but it could be caused by a problem with your ABS module.
Written by Joshua Levy
Reviewed by Melanie Reiff
Engine code C0035 indicates a problem with your left front wheel speed sensor. This code isn’t typically dangerous, but it could indicate issues with your antilock braking system or control. To avoid any major problems, have your car diagnosed and repaired as soon as possible.  
Engine codes are useful tools for understanding problems in your car without inspecting everything manually. To understand what’s wrong, you will need to learn how to read trouble codes on an OBD (On-Board Diagnostics) scanner. That said, an engine code can only specify a problematic area, so there are times when you will need a professional’s help.
Sometimes it’s hard to understand exactly what an engine code means. That’s why
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What does the engine code C0035 mean?

Definition: Engine code C0035 means there’s an issue with your left front wheel speed sensor
Each wheel on your car has a speed sensor that tracks the individual wheel's speed. Each sensor reports to the antilock braking system (ABS) module, which compares the wheel speeds. If one of your wheels has an irregular speed, your
ABS indicator light
will turn on 

How much will it cost to fix?

Diagnosing the problem will typically cost somewhere around $75 to $150, depending on your mechanic's labor costs. It could cost an additional $400 to replace a broken wheel speed sensor.

What can cause the C0035 engine code?

wheel speed sensor
is a small magnetic sensor on each side of your axles that tracks the speed of your wheel rotations. When your tires move at different speeds, you may experience faulty braking, quick tire wear, or even lower traction and control. It’s important that all your tire sensors stay in working shape.
Here are some of the most common causes of engine code C0035:
  • Broken left front wheel speed sensor
  • Misaligned sensor magnets 
  • Faulty ABS module
MORE: Winter tires vs. all-season tires: Which is better?

Common symptoms of the C0035 engine code

The most common symptoms of engine code C0035 are an illuminated ABS light and blinking warning lights related to stability and control. Of course, these symptoms are most common because they’re related to a faulty sensor. 
If the code results from problems with your ABS module, you may experience:
  • Unresponsive braking system
  • Less traction control 
  • Lower stability
Since engine code C0035 can be relatively dangerous when caused by issues with the ABS module, it’s best to have the problem diagnosed and fixed as soon as possible. 

How serious is the C0035 engine code? 

Engine code C0035 isn’t usually dangerous. However, it could indicate serious ABS module issues. A failing ABS module could lead to inoperative brakes, traction control, and stability control—which can be dangerous on the road. 

Can I fix the C0035 engine code myself?

While it may be possible to fix engine code C0035 from home, you’ll be better off leaving repairs to a professional. Engine code C0035 arises from fairly complex issues that could require replacing one of the following:
  • Left wheel speed sensor
  • ABS Module
Since both of these components involve electrical elements and connect to your car’s engine control unit, they may be difficult to properly repair for untrained individuals. For these reasons, it’s best to leave engine code C0035 repairs to a professional mechanic. 
MORE: How to decide if you should take your car to a repair shop or a mobile mechanic

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