Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Retrieving DTCS
Connect Tech 1 scan tool to DLC located under steering column. Access 4WAL brake DTCs. Repair DTCs in the order they appear. See 4WAL DIAGNOSTIC TROUBLE CODE (DTC) table for diagnosis. Before diagnosing DTC(s), perform DIAGNOSTIC SYSTEM CHECK first.
| DTC | (1) Definition | ||
|---|---|---|---|
| C0022 | Right Front Wheel Speed Sensor Circuit Open Or Shorted To Battery Voltage | ||
| C0023 | Right Front Wheel Speed Sensor Signal Missing | ||
| C0025 | Right Front Wheel Speed Sensor Signal Erratic | ||
| C0026 | Left Front Wheel Speed Sensor Circuit Open Or Shorted To Battery Voltage | ||
| C0027 | Left Front Wheel Speed Sensor Signal Erratic | ||
| C0029 | Simultaneous Dropout Of Front Wheel Speed Sensor Signal | ||
| C0035 | Rear Speed Sensor Signal Circuit Open Or Grounded | ||
| C0036 | Rear Speed Sensor Signal Missing | ||
| C0037 | Rear Speed Sensor Signal Erratic | ||
| C0038 | Wheel Speed Signal Malfunction | ||
| C0041 | Right Front Isolation Solenoid Circuit Open | ||
| C0042 | Right Front Dump Solenoid Circuit Open | ||
| C0043 | Right Front Isolation Solenoid Circuit Shorted | ||
| C0044 | Right Front Dump Solenoid Circuit Shorted | ||
| C0045 | Left Front Isolation Solenoid Circuit Open | ||
| C0046 | Left Front Dump Solenoid Circuit Open | ||
| C0047 | Left Front Isolation Solenoid Circuit Shorted | ||
| C0048 | Left Front Dump Solenoid Circuit Shorted | ||
| C0051 | Rear Isolation Solenoid Circuit Open | ||
| C0052 | Rear Dump Solenoid Circuit Open | ||
| C0053 | Rear Isolation Solenoid Circuit Shorted | ||
| C0054 | Rear Dump Solenoid Circuit Shorted | ||
| C0065 | Pump Motor Relay Circuit Open | ||
| C0066 | Pump Motor Relay Circuit Shorted | ||
| C0067 | Pump Motor Circuit Open | ||
| C0068 | Pump Motor Locked Or Pump Motor Circuit Shorted | ||
| C0071 | EBCM Internal Fault | ||
| C0072 | EBCM Internal Fault | ||
| C0073 C0073 | EBCM Internal Fault | ||
| C0074 | EBCM Internal Fault | ||
| C0081 | Stoplight Switch Always Closed Or Shorted | ||
| C0086 | Anti-Lock Indicator Light Circuit Shorted To Battery Voltage | ||
| C0088 | Brake Warning Light Circuit Shorted To Battery Voltage | ||
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.