P0318 - Rough Road Sensor A Signal Circuit

The ECM detected a fault in rough-road sensor A signal circuit.

Code Overview

The ECM detected a fault in rough-road sensor A signal circuit.

Common Causes

• Failed rough-road sensor
• Wiring problem
• Module communication issue

Diagnostic Steps

1. Inspect sensor wiring and connectors
2. Check for related ABS or chassis faults
3. Verify the signal with scan data if supported

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

Browse the closest code-family pages when the same fault pattern often shows up nearby.

Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.