C03xx codes: Chassis codes C0300-C0399
20 chassis trouble codes from C0300 to C0399. They mostly involve the transfer case control module, ABS hydraulic block, ABS control module and air suspension module.
All C03xx codes
0 of these codes usually turn on the check engine light; 11 can often be fixed at home.
| Code | Meaning | Difficulty |
|---|---|---|
| C0300 | Inlet Valve Front Left Performance | Hard |
| C0301 | Air Suspension Compressor Relay | Medium |
| C0302 | Outlet Valve Front Left Performance | Hard |
| C0303 | Inlet Valve Front Right Performance | Hard |
| C0304 | Outlet Valve Front Right Performance | Hard |
| C0305 | Inlet Valve Rear Left Performance | Hard |
| C0306 | Transfer Case Motor A or B Circuit | Medium |
| C0307 | Inlet Valve Rear Right Performance | Hard |
| C0308 | Transfer Case Motor A/B Circuit Low | Medium |
| C0309 | Outlet Valve Rear Right Performance | Hard |
| C0310 | Transfer Case Motor A/B Circuit Open | Medium |
| C0312 | Ride Height Sensor Rear Right | Medium |
| C0317 | Compressor Relay Circuit | Medium |
| C0327 | Encoder Motor | Medium |
| C0374 | 4WD Drive Coupling | Hard |
| C0376 | Front Axle Disconnect | Medium |
| C0387 | Transfer Case Unable to Complete Shift | Medium |
| C0388 | Transfer Case High Range Switch Circuit Malfunction | Medium |
| C0389 | Transfer Case Low Range Switch Circuit Malfunction | Medium |
| C0399 | 4WD Mode Switch Circuit Malfunction | Easy |