P0317 Rough Road Hardware Not Present

P0317 indicates rough road detection hardware is reported as not present. The controller may be missing expected rough-road information used to separate road vibration from true misfire events.

Code details

Generic OBD-II · P0

System: Ignition / Misfire
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace misfire parts until configuration, ABS data, and rough-road detection availability are checked.

Symptoms of P0317

Rough idle, shaking, or a stumble under acceleration.
A flashing check-engine light during an active misfire.
Power loss and higher fuel consumption.

Common causes of P0317

Worn spark plugs, ignition coils, or plug wires.
Fuel-delivery problems — injectors, pressure, or a lean/rich mixture.
Vacuum leaks, low compression, or a mechanical fault in that cylinder.

Useful checks before replacing parts

Compare module configuration, calibration, ABS or stability-control data, wheel speed inputs, and rough-road status on the scan tool.
Inspect related wiring, module coding, replacement PCM history, ABS faults, and communication codes that can remove rough-road information.
Confirm whether the vehicle is supposed to use a rough-road sensor, ABS-derived rough-road logic, or no separate hardware for that market and calibration.

Related OBD-II codes

These nearby ignition / misfire entries can help compare wording and pin down the fault area.