P0123 2015 GMC Sierra Code - Throttle Position Sensor Circuit High Voltage
Quick Answer
The P0123 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a potential issue with the Throttle Position Sensor (TPS) circuit reporting high voltage. Common causes include Faulty Throttle Position Sensor, Damaged or corroded wiring in the TPS circuit, Loose or disconnected TPS connector. 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
- P0123 2015 GMC Sierra indicates Throttle Position Sensor Circuit High Voltage.
- Common causes
- Common causes include Faulty Throttle Position Sensor, Damaged or corroded wiring in the TPS circuit, Loose or disconnected TPS connector.
- 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 P0123 2015 GMC Sierra Description
The P0123 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a potential issue with the Throttle Position Sensor (TPS) circuit reporting high voltage. The TPS is a sensor that monitors the position of the throttle valve in the engine. It plays a crucial role in the engine's fuel management system, determining how much air and fuel should be delivered to the engine based on the driver's input via the accelerator pedal. When the TPS circuit reports high voltage, it means that the voltage signal being sent by the TPS to the engine control module (ECM) is outside of the expected range.
Common Causes of P0123 2015 GMC Sierra
- Faulty Throttle Position Sensor
- Damaged or corroded wiring in the TPS circuit
- Loose or disconnected TPS connector
- Malfunctioning Engine Control Module (ECM)
- Contaminated throttle body affecting TPS readings
Symptoms of P0123 2015 GMC Sierra
- Engine hesitation or surging during acceleration
- Rough idling or stalling
- Reduced engine power or responsiveness
- Check Engine Light illuminated on the dashboard
- Poor fuel economy
How to Fix P0123 2015 GMC Sierra
- Diagnose the issue by using a scan tool to read the DTC and perform a visual inspection of the TPS wiring and connector.
- Test the TPS sensor using a multimeter to verify if it is within the specified voltage range.
- Replace the TPS sensor if it is found to be faulty, ensuring proper installation and calibration.
- Inspect and repair any damaged wiring or connectors in the TPS circuit.
- Clear the DTC and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0123 2015 GMC Sierra
The cost of repairing a Throttle Position Sensor circuit high voltage issue can vary depending on the extent of the damage and the specific components that need to be replaced. In general, the cost of replacing a TPS sensor ranges from $50 to $200, while labor costs can range from $100 to $200. Overall, the total repair cost for this issue can range from $150 to $400, including parts and labor. It is advisable to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on your specific vehicle and location.
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