C1208 ABS Rear Isolation Valve Circuit Short to Battery

Definition: This diagnostic trouble code (DTC) indicates a short circuit condition in the rear isolation valve circuit of the Anti-lock Braking System (ABS). The system has detected that there is an electrical short to the battery voltage within this specific circuit, which can affect the proper functioning of the ABS.

C1208 ABS Rear Isolation Valve Circuit Short to Battery

Severity: Moderate

Common Causes

C1208 – ABS Rear Isolation Valve Circuit Short to Battery

Common Causes:

• Faulty rear isolation valve
• Short circuit in the wiring harness
• Corrosion or poor connection in the circuit
• Defective ABS control module

 

Common Misdiagnosis

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OBD2 Code: C1208

Description: ABS Rear Isolation Valve Circuit Short to Battery

Common Misdiagnosis: Replacing the ABS module without checking for wiring issues or a faulty isolation valve.

 

Common Diagnostic Steps

OBD2 Code: C1208

Description: ABS Rear Isolation Valve Circuit Short to Battery

Common Diagnostic Steps:

• Inspect the ABS fuse and replace if necessary.
• Check for any visible damage or corrosion on the wiring harness and connectors related to the rear isolation valve circuit.
• Perform a continuity test on the wiring from the ABS module to the rear isolation valve to ensure there are no shorts or open circuits.
• Test the rear isolation valve solenoid for proper operation using a multimeter.
• Examine the ABS control module for any signs of internal failure or damage.
• If all components test correctly, consider reprogramming or replacing the ABS control module as a last resort.