P0317: Rough Road Hardware Not Present
What to do
The car will drive normally. Misfire detection is less reliable on poor surfaces until it is resolved. Most often follows a control module replacement or reprogramming that left the vehicle configuration wrong.
What this code means
Misfire detection works by measuring tiny variations in crankshaft speed — and a rough road shakes the driveline enough to produce those variations without any misfire occurring. Vehicles that account for this read a rough-road signal, often borrowed from the ABS wheel speed sensors, and suspend misfire monitoring while the surface is bad. This code says the module expected that hardware and cannot find it, which usually means a configuration mismatch rather than a failure.
Likely causes
Start here
- Incorrect module configuration after replacement · moderate
- Lost communication with ABS module · moderate
Less common
- Faulty rough road sensor · moderate
- Control module software fault · specialist
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
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