P0319: Rough Road Sensor B Signal Circuit
What to do
The car will drive normally. Not urgent.
What this code means
A circuit fault in the second rough road sensor, where two are fitted. Diagnosis mirrors sensor A, and where both report together the shared supply, ground or the ABS module that feeds them is the better suspect.
Likely causes
Start here
- Faulty rough road sensor · moderate
- Open circuit in sensor wiring · moderate
- Corroded or loose connector · easy
Less common
- Lost communication with ABS module · moderate
Symptoms
Components involved
Information, not instruction
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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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Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
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.
- What actually fixed it — or that nothing did, which is worth knowing too.
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