P1398 GMC Code - Wheel Speed Sensor 2 G-Sensor Circuit High Voltage
Quick Answer
The P1398 GMC diagnostic trouble code (DTC) specifically refers to an issue with the Wheel Speed Sensor 2 G-Sensor Circuit registering high voltage. Common causes include Faulty Wheel Speed Sensor 2, Damaged or frayed wiring in the G-sensor circuit, Corrosion or debris affecting the sensor's connections. 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
- P1398 GMC indicates Wheel Speed Sensor 2 G-Sensor Circuit High Voltage.
- Common causes
- Common causes include Faulty Wheel Speed Sensor 2, Damaged or frayed wiring in the G-sensor circuit, Corrosion or debris affecting the sensor's connections.
- 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 P1398 GMC Description
The P1398 GMC diagnostic trouble code (DTC) specifically refers to an issue with the Wheel Speed Sensor 2 G-Sensor Circuit registering high voltage. This code is typically seen in GMC vehicles and indicates a problem with the second wheel speed sensor's G-sensor circuit. The wheel speed sensor is a vital component of the vehicle's anti-lock braking system (ABS) and traction control system. It measures the wheel speed and relays this information to the vehicle's electronic control module (ECM) to help prevent wheel lock-up during braking and improve traction control.
Common Causes of P1398 GMC
- Faulty Wheel Speed Sensor 2
- Damaged or frayed wiring in the G-sensor circuit
- Corrosion or debris affecting the sensor's connections
- ECM software issues or malfunctions
- Impact or damage to the sensor from road debris or collisions
Symptoms of P1398 GMC
- ABS warning light illuminated on the dashboard
- Traction control system malfunction
- Erratic or inconsistent braking behavior
- Loss of traction on slippery surfaces
- Reduced fuel efficiency due to compromised system efficiency
How to Fix P1398 GMC
- Conduct a thorough visual inspection of the Wheel Speed Sensor 2 and its wiring for any visible damage or corrosion.
- Use a multimeter to test the sensor's resistance and voltage output to determine if it is functioning within the specified range.
- Replace the Wheel Speed Sensor 2 if it fails the resistance and voltage tests, ensuring to follow manufacturer guidelines for installation.
- Check and repair any damaged wiring or connections in the G-sensor circuit.
- Clear the DTC and perform a test drive to verify that the code does not reappear and that the ABS and traction control systems are functioning correctly.
Cost to Fix P1398 GMC
The cost of repairing a Wheel Speed Sensor 2 G-Sensor Circuit High Voltage issue can vary depending on the specific GMC model, the location of the repair shop, and the labor rates. Typically, the cost of replacing a wheel speed sensor ranges from $100 to $300, including parts and labor. Additional costs may apply if there are wiring or ECM issues that need to be addressed. It is advisable to obtain quotes from local auto repair shops to get a more accurate estimate based on your vehicle's specific needs.
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