P0319 low

Rough Road Hardware Not Present

The P0319 code means the vehicle's onboard diagnostic system has detected: Rough Road Hardware Not Present. This is a low severity code.

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Keep driving?: Yes, but fix soon
DIY difficulty: hard
Estimated cost: $100 - $400 (parts and labor)

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Common Symptoms

Check Engine Light on
Misfire detection may be inaccurate
False misfire codes may appear
No noticeable drivability issues

Probable Causes (Ranked by Likelihood)

Missing or non-functional rough road sensor Very High
Disconnected wheel speed sensor used for rough road detection High
ECM calibration mismatch with vehicle hardware Moderate
Aftermarket suspension modification affecting sensor signal Moderate

Step-by-Step Diagnostic Procedure

Check for any disconnected wheel speed sensors or ABS sensors
Verify all four wheel speed sensors are communicating properly via scan tool data
Check for aftermarket suspension modifications that may have disturbed sensor wiring
Review technical service bulletins for your vehicle regarding rough road detection calibration

Frequently Asked Questions

What is rough road detection?

Rough road detection uses wheel speed sensors or a dedicated sensor to detect when the vehicle is on rough terrain. This allows the ECM to distinguish between actual engine misfires and crankshaft speed variations caused by road conditions.

Is P0319 a serious code?

P0319 is not typically a serious drivability concern. However, without rough road detection, the ECM may set false misfire codes when driving on rough terrain, which can be misleading during diagnosis.

Can aftermarket wheels cause P0319?

Aftermarket wheels with different specifications can affect wheel speed sensor air gaps, potentially disrupting the rough road detection system. If P0319 appeared after a wheel or suspension change, inspect sensor clearances.