P1391 Chevrolet Code - Wheel Speed Sensor 1 G-Sensor Circuit Performance
Quick Answer
The P1391 Chevrolet diagnostic trouble code (DTC) specifically points to a problem with Wheel Speed Sensor 1 G-Sensor Circuit Performance. Common causes include Damaged or worn wheel speed sensor wiring, Faulty wheel speed sensor or G-sensor, ECM software issues or malfunctions. 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 Chevrolet indicates Wheel Speed Sensor 1 G-Sensor Circuit Performance.
- Common causes
- Common causes include Damaged or worn wheel speed sensor wiring, Faulty wheel speed sensor or G-sensor, ECM software issues or malfunctions.
- 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 Chevrolet Description
The P1391 Chevrolet diagnostic trouble code (DTC) specifically points to a problem with Wheel Speed Sensor 1 G-Sensor Circuit Performance. In simpler terms, this code indicates that there is an issue with the performance of the wheel speed sensor and G-sensor circuit in the vehicle. The wheel speed sensor is responsible for monitoring the speed of each wheel and sending this information to the vehicle's electronic control module (ECM) to assist in various functions such as traction control, anti-lock braking system (ABS), and stability control. The G-sensor, on the other hand, detects the vehicle's acceleration, deceleration, and lateral movement.
Common Causes of P1391 Chevrolet
- Damaged or worn wheel speed sensor wiring.
- Faulty wheel speed sensor or G-sensor.
- ECM software issues or malfunctions.
- Corrosion or debris affecting sensor connections.
- Electrical issues such as short circuits or open circuits in the sensor circuits.
Symptoms of P1391 Chevrolet
- Illumination of the ABS warning light on the dashboard.
- Traction control system engaging unexpectedly or not working properly.
- Unstable handling or steering response, especially during braking or cornering.
- Increased stopping distance or difficulty in braking smoothly.
- Erratic speedometer readings or cruise control malfunctions.
How to Fix P1391 Chevrolet
- Conduct a thorough diagnosis using a scan tool to pinpoint the exact cause of the issue.
- Inspect and test the wheel speed sensor and G-sensor for proper functionality.
- Check the wiring and connections for any damage, corrosion, or loose connections.
- Replace any faulty sensors or components as needed.
- Clear the DTC and perform a test drive to ensure the issue has been resolved.
Cost to Fix P1391 Chevrolet
The typical repair costs for addressing a P1391 Chevrolet code can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of replacing a wheel speed sensor or G-sensor can range from $100 to $300 per sensor, including parts and labor. If additional components or wiring repairs are necessary, the total cost could be higher. Diagnostic time and labor rates at auto repair shops can range from $80 to $150 per hour, so it's advisable to check with local shops for a more accurate estimate based on your vehicle make and model.
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