C0002 code meaning
TCS Control Channel A Valve 2
What C0002 means
C0002 points to the second traction control valve of channel A. Together with valve 1 it forms the valve pair a TCS modulator adds to each brake circuit: an isolation valve that cuts the circuit off from the master cylinder and a priming valve that opens the path from the master cylinder to the return pump, so pressure can rise at a driven wheel while the pedal is released. The public record does not say which of the pair J2012 calls valve 2. The module flags an open or shorted coil, an implausible current or a pressure response that does not match the command. Traction and stability control are switched off and the ABS or ESC lamp comes on; foundation braking still works. No manufacturer documents this code publicly.
C0002 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C0002
- ABS warning lamp on
- Traction and stability control disabled
- Normal braking retained without ABS
Common causes of C0002
- Most likelySolenoid coil open or shorted
- PossibleCorroded or chafed wiring to the modulator
- Less likelyInternal hydraulic modulator fault
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Tcs valve a2
What each part of C0002 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 02 | The exact fault in that area. |
What to do next
- Note C0002 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 C0002
What does C0002 mean?
C0002 means "TCS Control Channel A Valve 2". C0002 points to the second traction control valve of channel A. It is a generic code, so it means the same on every make.
Is it safe to drive with C0002?
Drive gently and only to a workshop. With C0002 the car can go into limp mode (reduced power) to protect itself.
Will C0002 fail an emissions test?
C0002 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 C0002 to fix?
Difficulty: workshop only. A typical repair takes 1.5 to 4 hours of work. This is a job for a workshop.
Will C0002 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.