P0319Rough Road Sensor B Signal Circuit
- Generic OBD-II code · Powertrain
- How the car detects it
- Misfire detection works from crankshaft speed fluctuations, which rough roads also cause. CARB therefore allows misfire detection to pause on rough roads; many engines take a rough-road signal from the wheel speeds of the ABS module, a Ford patent describes such a detector. P0319 is like P0318, but for a second rough-road signal source B – depending on the manufacturer, for example an acceleration sensor or transmission output speed. The signal is missing or invalid, so misfire detection runs without its rough-road filter. No manufacturer using P0319 was found; following GM's handling of P0318, the warning light often stays off.
- What you may notice
- Warning light (manufacturer-dependent, often none)
- Possibly ABS or transmission codes
- Driving unaffected
- Likely causes
- LikelySignal source B or its wiring faulty
- PossibleCommunication fault to the supplying module (ABS, transmission)
- RareConfiguration or software
- RareEngine module faulty
- Repair
- Medium · Often possible to do yourself.Typical cost: €50 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.