P1391 Cadillac Code - Wheel Speed Sensor 1 G-Sensor Circuit Performance
Quick Answer
The P1391 code for Cadillac vehicles indicates an issue with the Wheel Speed Sensor 1 G-Sensor Circuit Performance. Common causes include Faulty Wheel Speed Sensor, Damaged or corroded wiring/connectors in the sensor circuit, Issues with the G-Sensor or its circuitry. 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 Cadillac indicates Wheel Speed Sensor 1 G-Sensor Circuit Performance.
- Common causes
- Common causes include Faulty Wheel Speed Sensor, Damaged or corroded wiring/connectors in the sensor circuit, Issues with the G-Sensor or its circuitry.
- 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 Cadillac Description
The P1391 code for Cadillac vehicles indicates an issue with the Wheel Speed Sensor 1 G-Sensor Circuit Performance. The Wheel Speed Sensor is responsible for monitoring the speed of each wheel and transmitting that information to the vehicle's electronic control module (ECM). The G-Sensor, or lateral acceleration sensor, measures the vehicle's lateral movement during turns and sudden maneuvers. When the ECM detects that the performance of this circuit is outside of the expected parameters, it triggers the P1391 code.
Common Causes of P1391 Cadillac
- Faulty Wheel Speed Sensor
- Damaged or corroded wiring/connectors in the sensor circuit
- Issues with the G-Sensor or its circuitry
- ECM malfunction or software glitch
Symptoms of P1391 Cadillac
- ABS or Traction Control warning lights illuminated on the dashboard
- Loss of traction control or stability during turns or sudden maneuvers
- Inaccurate speed readings on the speedometer
- Delayed or erratic braking response
How to Fix P1391 Cadillac
- Diagnose the issue using a diagnostic scanner to confirm the P1391 code and pinpoint the exact cause
- Inspect the Wheel Speed Sensor and G-Sensor for any damage, corrosion, or loose connections
- Test the sensor circuitry and wiring for continuity and proper voltage
- Replace the faulty sensor or repair any damaged wiring/connectors
- Clear the code from the ECM's memory and perform a test drive to ensure the issue has been resolved
Cost to Fix P1391 Cadillac
The cost of repairing the Wheel Speed Sensor 1 G-Sensor Circuit Performance issue can vary depending on the specific cause of the problem and the labor rates at the auto repair shop. Typically, replacing a faulty Wheel Speed Sensor can range from $100 to $300, while addressing wiring or connector issues may add to the total cost. Including parts and labor, the total repair cost could be anywhere from $150 to $500. It's recommended to consult with a trusted mechanic or dealership for a more accurate estimate based on your Cadillac model and location.
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