P0318
Rough Road Sensor A Signal Circuit
P0318 is an OBD-II diagnostic trouble code meaning: Rough Road Sensor A Signal Circuit. Common causes: open or short circuit in the sensor circuit, malfunction of the rough road sensor itself. Estimated repair cost: $33–167.
Symptoms
- False alarms for misfires
- Unstable engine operation on rough roads
- Check Engine Light Is On
Causes
- Open or short circuit in the sensor circuit
- Malfunction of the rough road sensor itself
- Wiring harness damage
- Corrosion of connectors
- Circuit Grounding Problems
How to Fix
- Check the integrity of the sensor wiring harness
- Check the supply voltage and grounding of the sensor
- Diagnose the sensor with a multimeter or oscilloscope
- Clean connector contacts from oxidation
- Replace the faulty sensor if necessary
Related codes
Error P0318 by Vehicle Brand
FAQ
What does the P0318 code mean?
P0318 is an OBD-II diagnostic trouble code that indicates: Rough Road Sensor A Signal Circuit
What causes a P0318 error code?
The most common causes of P0318 include: Open or short circuit in the sensor circuit; Malfunction of the rough road sensor itself; Wiring harness damage; Corrosion of connectors.
How do I fix a P0318 diagnostic trouble code?
To fix P0318: Check the integrity of the sensor wiring harness. Check the supply voltage and grounding of the sensor. Diagnose the sensor with a multimeter or oscilloscope. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0318?
Limited driving only, diagnose soon
How much does it cost to fix P0318?
The estimated repair cost for P0318 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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