P0319
UniversalRough Road Sensor B Signal Circuit
The engine control system has detected an issue with the signal circuit for rough road sensor B. This sensor input can help the system account for road vibration when interpreting engine vibration, including during misfire monitoring. The code does not by itself prove the sensor has failed, and the vehicle may drive normally.
⚠️ Before You Begin (Safety First)
This code alone does not necessarily make the vehicle unsafe to drive. If the engine runs roughly, loses power, or the check-engine light flashes, reduce load and stop driving when safe; continued driving with an active misfire can cause damage. Follow the vehicle’s manual and arrange diagnosis.
Common Symptoms
- The check-engine light may be on.
- The vehicle may have no noticeable drivability symptoms if the fault affects only the rough-road input.
- Engine vibration or a rough-running condition may be noticed, but this code alone does not confirm an engine misfire.
- Misfire monitoring or interpretation may be affected if the system cannot use the rough-road signal as intended.
Common Causes
- A damaged, loose, or contaminated connector or wiring in the rough road sensor B signal circuit.
- A rough road sensor B that does not provide a usable signal.
- A circuit connection or ground problem, where applicable to the vehicle design.
- A control-system or signal-processing issue that requires vehicle-specific diagnosis.
Diagnostic Steps
- Check whether the check-engine light is steady or flashing and note any rough running, loss of power, or other symptoms.
- Use a compatible scan tool to record this code and any related codes before clearing anything; related codes can help narrow the diagnosis.
- With the vehicle safely parked and switched off, visually inspect accessible wiring and connectors associated with the rough road sensor circuit for damage, looseness, or corrosion.
- Do not replace the sensor based on this code alone. If the wiring looks intact or the code returns, arrange testing using service information for the exact model, year, and engine.
When to Call a Professional
Check for related codes and review available sensor data before replacing parts. A technician can inspect the sensor circuit and connectors, verify the signal and wiring using vehicle-specific service information, and determine whether the fault is in the sensor, wiring, or control system.
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Commonly Asked Questions
Does P0319 prove that rough road sensor B needs replacement?
No. The code identifies a detected signal-circuit condition, not a confirmed failed part. Wiring, connectors, and other parts of the control system may also need to be checked.
Can the vehicle feel normal with P0319?
Yes. The vehicle may have no noticeable symptoms, particularly if the fault mainly affects how the system interprets vibration.
Does P0319 mean the engine is misfiring?
No. This code concerns the rough road sensor B signal circuit. A separate misfire code or symptoms would need their own diagnosis.
Can I keep driving with P0319?
If the vehicle runs normally and the check-engine light is steady, the code alone does not establish an immediate driving hazard. Stop when safe if the light flashes, the engine runs roughly, or power drops, and seek diagnosis.
What testing can distinguish a sensor fault from a wiring problem?
A technician can review scan data and test the sensor signal and circuit connections against service information for the exact vehicle. The applicable tests and procedures vary by model, year, and engine.
Browse Available Code Guides
Previous and next available guides in database record order, across makes. Adjacent entries may share a code number and do not necessarily describe related faults.