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.
Anti-Lock Brake System (ABS) Module Diagnostic Trouble Code (DTC) Index
2004 Ford Focus ZX3, 2.3 Z, StandardSECTION Anti-Lock Brake System (ABS) Module Diagnostic Trouble Code (DTC) Index
ANTI-LOCK BRAKE SYSTEM DIAGNOSTIC TROUBLE CODE CHART
| DTC | Description | Source | Action |
|---|---|---|---|
| B1676 | Battery voltage out of range | ABS | Go to PINPOINT TEST C . |
| B1342 | ABS module internal failure | ABS | INSTALL a now HCU. REFER to HYDRAULIC CONTROL UNIT (HCU) . CLEAR the DTCs. REPEAT the self-test. |
| C1095 | ABS hydraulic pump motor circuit failure | ABS | Go to PINPOINT TEST D . |
| C1141 | LF Wheel Speed Tone Ring Tooth Missing Fault | ABS/TC | INSPECT the LF tone ring for missing/damaged teeth or debris. INSTALL a new wheel speed sensor ring as necessary. REFER to FRONT SUSPENSION . CLEAR the DTCs. REPEAT the self-test. |
| C1142 | RF Wheel Speed Tone Ring Tooth Missing Fault | ABS/TC | INSPECT the RF tone ring for missing/damaged teeth or debris. INSTALL a new wheel speed sensor ring as necessary. REFER to FRONT SUSPENSION . CLEAR the DTCs. REPEAT the self test. |
| C1143 | LR Wheel Speed Tone Ring Tooth Missing Fault | ABS/TC | INSPECT the LR tone ring for missing/damaged teeth or debris. INSTALL a new wheel speed sensor ring as necessary. REFER to REAR SUSPENSION . CLEAR the DTCs. REPEAT the self-test. |
| C1144 | RR Wheel Speed Tone Ring Tooth Missing Fault | ABS/TC | INSPECT the RR tone ring for missing/damaged teeth or debris. INSTALL a new wheel speed sensor ring as necessary. REFER to REAR SUSPENSION . CLEAR the DTCs. REPEAT the self-test. |
| C1145 | RF wheel speed sensor input circuit failure | ABS | Go to PINPOINT TEST E . |
| C1155 | LF wheel speed sensor input circuit failure | ABS | Go to PINPOINT TEST E . |
| C1165 | RR wheel speed sensor input circuit failure | ABS | Go to PINPOINT TEST E . |
| C1175 | LR wheel speed sensor input circuit failure | ABS | Go to PINPOINT TEST E . |
| C1233 | LF wheel speed input signal missing | ABS | Go to PINPOINT TEST F . |
| C1234 | RF wheel speed input signal missing | ABS | Go to PINPOINT TEST F . |
| C1235 | RR wheel speed input signal missing | ABS | Go to PINPOINT TEST F . |
| C1236 | LR wheel speed input signal missing | ABS | Go to PINPOINT TEST F . |
| C1267 | ABS functions temporarily disabled | ABS | Go to PINPOINT TEST I . |
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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.