What does it mean?
This diagnostic trouble code (DTC) is a generic powertrain code, meaning it applies to OBD-II equipped vehicles (VW, Ford, Audi, Buick, GM, etc.). Although generic, specific repair steps may vary by make/model.
A P0317 fault code belongs to the category of codes that includes ignition system codes. The reason is that often “rough road hardware” is actually an interpretation of sensors that have essentially detected the engine’s crankshaft moving unexpectedly.
The vehicle’s sensor system and PCM, or Powertrain Control Module, can indicate rough road conditions. For example, engine RPM may be irregular when the vehicle is driven on very rough roads or off-road. This can cause the PCM to interpret it as an engine failure such as a misfire.
Some vehicles may have a road sensor, an accelerometer, or some may use an ABS wheel sensor and the Electronic Brake Control Module (EBCM) to help determine rough road conditions.
Regardless of the exact system used in your vehicle, if you get this fault code, it means the PCM has detected a rough road condition that requires attention. Typically, this code is only set when the readings are identical after multiple readings.
Symptoms
Most fault codes trigger the Check Engine light (or Malfunction Indicator Lamp MIL). For this P0317 DTC, the light is not illuminated. However, you may have other warning lights on (traction control, ABS, etc.) or even experience engine misfires or rough operation.
Causes
Possible causes for setting this code are:
Faulty rough road sensor (if equipped)
Wiring/electrical fault related to sensors
Control unit needs to initialize the new road sensor
Other possible causes
Diagnostic and Repair Procedures
A good first step is to check for Technical Service Bulletins (TSBs) that may apply to your year/make/model. If the issue is known, there may be a bulletin providing specific diagnostic and repair assistance for your exact problem. This can save you time and money.
You should obtain a vehicle-specific repair guide to help determine the exact type of rough road detection system used by your vehicle.
If you have other misfire, ABS, or related codes, you should generally address those before proceeding to repair a P0317. Nevertheless, save all freeze frame data, as it can be useful in any diagnostics.
If your vehicle has an accelerometer sensor, check the sensor’s condition, wiring, and connectors for any issues. Repair as needed. Then, use a digital volt ohmmeter (DVOM) to check continuity, resistance, and other electrical aspects according to the manufacturer’s specifications.
If possible, use an advanced scan tool to drive the vehicle on rough roads and monitor sensor readings from the appropriate vehicle sensors to determine if you can replicate the problem, helping to pinpoint where the issue lies.