Rough Road Sensor B Signal Circuit Malfunction
The P0319 code indicates a problem with the Rough Road Sensor B signal circuit. This sensor is used by the powertrain control module (PCM) to detect road surface irregularities and adjust engine and transmission operation accordingly. A fault in this circuit can cause the PCM to receive incorrect or no data, potentially affecting vehicle stability control, misfire detection, and shift quality.
01. Most Common Causes
- Faulty rough road sensor B
- Open or shorted wiring in the sensor circuit
- Poor electrical connection at the sensor or PCM
- Damaged sensor mounting or bracket
- Corrosion or water intrusion in the connector
02. Symptoms You Will Notice
- Illuminated Check Engine Light
- Rough or unstable idle
- Harsh or delayed transmission shifts
- Reduced fuel economy
- Traction control or stability system warning lights
03. Step-by-Step Diagnosis
Step 1: Scan the vehicle for additional codes and freeze frame data.
Step 2: Visually inspect the rough road sensor B and its wiring for damage, corrosion, or loose connections.
Step 3: Test the sensor's resistance and voltage output using a multimeter and compare to manufacturer specifications.
Step 4: Check for continuity and shorts in the signal circuit between the sensor and PCM.
Step 5: If all tests pass, replace the rough road sensor B and clear the code.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally not recommended to drive with this code as it can affect vehicle stability and transmission operation, potentially leading to unsafe driving conditions.
How much does it cost to fix?▼
The cost to fix P0319 typically ranges from $50 to $150, including parts and labor, depending on the cause and vehicle make/model.