C003E code meaning
Rear Wheel Speed Sensor Supply
What C003E means
Covers the supply circuit that powers a single rear active wheel speed sensor on vehicles with one combined rear speed signal. Active sensors need a regulated voltage from the ABS/ESC module; this code is set when that supply is open, shorted to ground or another voltage, or outside the regulated range so the sensor cannot produce a valid signal. It is distinct from the sensor-signal code C003D in that the fault is on the feed rather than the sensor element. A fault disables ABS, traction and stability control and lights the ABS warning lamp while base braking remains. No manufacturer documents this code publicly; the J2012 table in NHTSA's EPS safety report lists C003E as the rear sensor supply.
C003E at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C003E
- ABS warning lamp on
- ABS and stability control disabled
- No rear wheel speed signal
Common causes of C003E
- Most likelyOpen or shorted sensor supply wire
- PossibleCorroded connector on the supply side
- Less likelyModule sensor supply output fault
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Rear wssSensor supply
What each part of C003E means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 3E | The exact fault in that area. |
What to do next
- Note C003E and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about C003E
What does C003E mean?
C003E means "Rear Wheel Speed Sensor Supply". Covers the supply circuit that powers a single rear active wheel speed sensor on vehicles with one combined rear speed signal. It is a generic code, so it means the same on every make.
Is it safe to drive with C003E?
Drive gently and only to a workshop. With C003E the car can go into limp mode (reduced power) to protect itself.
Will C003E fail an emissions test?
C003E is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is C003E to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will C003E clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.