P1390 GMC Code - Wheel Speed Sensor 1 G-Sensor Circuit
Quick Answer
The P1390 GMC code indicates a problem with Wheel Speed Sensor 1 G-Sensor Circuit on a GMC vehicle. Common causes include Damaged or corroded wiring connected to the wheel speed sensor, Faulty wheel speed sensor, Malfunctioning G-Sensor. 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
- P1390 GMC indicates Wheel Speed Sensor 1 G-Sensor Circuit.
- Common causes
- Common causes include Damaged or corroded wiring connected to the wheel speed sensor, Faulty wheel speed sensor, Malfunctioning G-Sensor.
- 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 P1390 GMC Description
The P1390 GMC code indicates a problem with Wheel Speed Sensor 1 G-Sensor Circuit on a GMC vehicle. The wheel speed sensor is a vital component of the vehicle's anti-lock braking system (ABS) and traction control system. The sensor is responsible for monitoring the speed of each wheel and sending this information to the vehicle's electronic control unit (ECU). The G-Sensor, or lateral acceleration sensor, measures the vehicle's side-to-side movement.
Common Causes of P1390 GMC
- Damaged or corroded wiring connected to the wheel speed sensor
- Faulty wheel speed sensor
- Malfunctioning G-Sensor
- ECU malfunction
- Poor electrical connection
Symptoms of P1390 GMC
- ABS warning light illuminated on the dashboard
- Traction control system malfunction
- Loss of traction on slippery surfaces
- Erratic braking behavior
- Vehicle stability issues during cornering
How to Fix P1390 GMC
- Begin by using a diagnostic scanner to retrieve the fault code and identify the specific issue with the wheel speed sensor 1 G-Sensor circuit.
- Inspect the wiring harness connected to the wheel speed sensor and G-Sensor for any signs of damage or corrosion. Repair or replace any damaged wires.
- Test the wheel speed sensor and G-Sensor using a multimeter to check for proper functionality. Replace any faulty sensors.
- If the sensors are in working order, check the ECU for any malfunctions. Reset or reprogram the ECU if necessary.
- Clear the fault code from the ECU's memory and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P1390 GMC
The typical repair costs for addressing a P1390 GMC code related to the Wheel Speed Sensor 1 G-Sensor Circuit can range from $200 to $500, including parts and labor. However, it's important to note that the actual cost can vary based on the specific diagnosis time and labor rates at auto repair shops. Rates can vary depending on factors such as location, vehicle make and model, and engine type. It is advisable to contact local auto repair shops for a more accurate estimate.
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