P0317
Rough Road Hardware Not Present
- Severity
- Low
- Driving
- Drivable — book it in
The module expects a rough road sensor and cannot find one. Rough road detection exists so that the bumps of a poor road surface are not mistaken for engine misfires - the crankshaft speed fluctuates in both cases. Without it, misfire detection is either disabled or prone to false alarms.
Possible causes
- CommonRough road sensor or its wiring faulty
- CommonSensor not fitted, or removed during previous work
- CommonModule expecting the option because it is coded for a different specification
- PossibleABS or wheel speed fault, where the rough road signal comes from that module
- PossibleCorroded connector
What you might notice
- Check engine light on
- Misfire codes on rough roads that do not match how the engine feels
- Misfire detection disabled
- Often no symptom the driver notices
What to check, in order
- Ask whether a module has been replaced or recoded. A module coded for a specification the car does not have will look for hardware that was never fitted.
- Check whether the vehicle is supposed to have this sensor at all.
- Check for ABS or wheel speed codes - on many vehicles the rough road signal comes from that module rather than from a dedicated sensor.
- Treat misfire codes with suspicion until this is resolved, particularly ones that only appear on poor road surfaces.
Read this code from your own car
Plug an ELM327 adapter into the OBD-II port under the dashboard. Pin16 reads every stored, pending and permanent code, explains each one like this page does — offline, with no account — and shows what the car recorded when the fault was set.
Where this code sits
P00xxP01xxP02xxP03xxP04xxP05xxP06xxP07xxP08xxP09xxP0AxxP0BxxP0CxxP0DxxP0ExxP0FxxP10xxP11xxP12xxP13xxP14xxP15xxP16xxP17xxP18xxP19xxP1AxxP1BxxP1CxxP1DxxP1ExxP1FxxP20xxP21xxP22xxP23xxP24xxP25xxP26xxP27xxP28xxP29xxP2AxxP2BxxP2CxxP2DxxP2ExxP2FxxP30xxP31xxP32xxP33xxP34xxP35xxP36xxP37xxP38xxP39xxP3AxxP3BxxP3CxxP3DxxP3ExxP3Fxx
Ignition system or misfire
P0300P0301P0302P0303P0304P0305P0306P0307P0308P0309P0310P0311P0312P0313P0314P0315P0316P0317P0318P0319P0320P0321P0322P0323P0324P0325P0326P0327P0328P0329P0330P0331P0332P0333P0334P0335P0336P0337P0338P0339P0340P0341P0342P0343P0344P0345P0346P0347P0348P0349P0350P0351P0352P0353P0354P0355P0356P0357P0358P0359P0360P0361P0362P0363P0364P0365P0366P0367P0368P0369P0370P0371P0372P0373P0374P0375P0376P0377P0378P0379P0380P0381P0382P0383P0384P0385P0386P0387P0388P0389P0390P0391P0392P0393P0394