P1391 GMC Code - Wheel Speed Sensor 1 G-Sensor Circuit Performance
Quick Answer
The P1391 GMC diagnostic trouble code indicates an issue with the Wheel Speed Sensor 1 G-Sensor Circuit Performance in the vehicle. Common causes include Damaged or faulty wheel speed sensor, Wiring or connector issues, Sensor calibration problems. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1391 GMC indicates Wheel Speed Sensor 1 G-Sensor Circuit Performance.
- Common causes
- Common causes include Damaged or faulty wheel speed sensor, Wiring or connector issues, Sensor calibration problems.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P1391 GMC Description
The P1391 GMC diagnostic trouble code indicates an issue with the Wheel Speed Sensor 1 G-Sensor Circuit Performance in the vehicle. The Wheel Speed Sensor is a vital component of the vehicle's Anti-lock Braking System (ABS) and Electronic Stability Control (ESC) system. It is responsible for monitoring the speed of each wheel and sending this information to the vehicle's computer system.
Common Causes of P1391 GMC
- Damaged or faulty wheel speed sensor
- Wiring or connector issues
- Sensor calibration problems
- Faulty vehicle computer system
- Corrosion or contamination affecting sensor performance
Symptoms of P1391 GMC
- ABS warning light illuminated on the dashboard
- ESC warning light activated
- Loss of traction control
- Braking performance issues, such as increased stopping distance
- Unusual noises coming from the wheel area
How to Fix P1391 GMC
- Diagnose the issue using a diagnostic scanner to confirm the P1391 GMC trouble code and identify the specific wheel speed sensor causing the problem.
- Inspect the wheel speed sensor, wiring, and connectors for damage or corrosion. Replace any damaged components.
- Calibrate the wheel speed sensor according to manufacturer specifications.
- Clear the trouble code from the vehicle's computer system and perform a test drive to ensure the issue has been resolved.
- If the problem persists, further diagnostics may be necessary to identify any underlying issues with the vehicle's computer system.
Cost to Fix P1391 GMC
The typical repair costs for addressing a P1391 GMC diagnostic trouble code can vary depending on the specific vehicle make and model, as well as the extent of the issue. In general, the cost of replacing a wheel speed sensor can range from $100 to $300, including parts and labor. Additional costs may apply if wiring or connector repairs are needed, or if further diagnostics are required. It's advisable to consult with a trusted auto repair shop for a more accurate estimate based on the individual circumstances of the vehicle in question.
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