The P0319: Rough Road Sensor B Signal Circuit code refers to an issue with the signal circuit of rough road sensor B. This sensor helps detect rough terrain and sends signals to the engine control module (ECM). If this code is triggered, it indicates a potential problem with the sensor, the signal circuit, or the related wiring. The ECM relies on this data to adjust vehicle performance on rough roads.
P0319 – Quick Overview
| Meaning | P0319: Rough Road Sensor B Signal Circuit |
| Is it serious? | Yes, this code is serious as it affects the ECM’s ability to manage vehicle performance on rough roads, leading to drivability issues. |
| Possible causes | – Faulty rough road sensor B – Signal circuit issues – Wiring problems |
| How to diagnose? | – Test rough road sensor B – Inspect signal circuit for issues – Check wiring connections |
P0319 Meaning
The P0319: Rough Road Sensor B Signal Circuit code means that the ECM is not receiving a proper signal from rough road sensor B. This issue may be caused by a malfunctioning sensor, a broken or damaged signal circuit, or wiring issues. If the ECM doesn’t receive proper signals from the sensor, it can negatively impact the vehicle’s ability to handle rough road conditions.
Step-by-step diagnostic guide
Follow the steps below to diagnose and resolve the P0319 code by addressing potential causes one by one.
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to see if any other related codes are present. These may help provide additional insights. | OBD-II Scanner |
| Inspect Rough Road Sensor B | Visually inspect rough road sensor B for signs of damage, corrosion, or improper mounting. Ensure it is securely connected. | Flashlight, Safety Gloves |
| Test Rough Road Sensor B | Use a multimeter to test the rough road sensor B for correct operation. Compare the readings to the manufacturer’s specifications. | Multimeter, Manufacturer’s Specifications |
| Inspect the Signal Circuit | Check the signal circuit leading to sensor B for signs of damage, such as short circuits, loose connections, or corrosion. | Flashlight, Wiring Repair Kit |
| Check Wiring Connections | Ensure that the wiring connections related to rough road sensor B are properly connected, free of corrosion, and not damaged. | Flashlight, Multimeter |
| Clear the Code and Test Drive | After completing the repairs, clear the P0319 code using an OBD-II scanner. Test drive the vehicle to verify that the problem is resolved. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | After the test drive, re-scan the vehicle to ensure the P0319 code has not returned. If it reappears, further diagnosis may be needed. | OBD-II Scanner |
This diagnostic guide will help you identify and repair the P0319 code, ensuring the rough road sensor B signal circuit functions correctly and the vehicle’s performance is properly managed on uneven terrain.
I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko