P0123 2014 GMC Sierra Code - Throttle Position Sensor Circuit High Voltage
Quick Answer
The P0123 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a Throttle Position Sensor Circuit High Voltage. Common causes include Faulty throttle position sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or contamination in the TPS circuit. 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 2014 GMC Sierra indicates Throttle Position Sensor Circuit High Voltage.
- Common causes
- Common causes include Faulty throttle position sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or contamination in the TPS circuit.
- 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 2014 GMC Sierra Description
The P0123 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a Throttle Position Sensor Circuit High Voltage. The throttle position sensor (TPS) is a crucial component of the vehicle's electronic throttle control system, responsible for monitoring the position of the throttle pedal and sending this information to the engine control module (ECM). The ECM uses this data to determine the appropriate fuel delivery and ignition timing for optimal engine performance.
Common Causes of P0123 2014 GMC Sierra
- Faulty throttle position sensor
- Damaged wiring or connectors in the TPS circuit
- Corrosion or contamination in the TPS circuit
- Issues with the ECM or other related components
- Environmental factors such as extreme temperatures affecting sensor performance
Symptoms of P0123 2014 GMC Sierra
- Rough idling or fluctuating idle speed
- Hesitation or lack of response when accelerating
- Poor fuel efficiency
- Engine stalling or difficulty starting
- Illumination of the check engine light
How to Fix P0123 2014 GMC Sierra
- Begin by conducting a thorough inspection of the TPS circuit, including the sensor, wiring, and connectors, to check for any visible damage or corrosion.
- Use a multimeter to test the voltage output of the TPS to determine if it is within the manufacturer's specified range. If the voltage is too high, the sensor may need to be replaced.
- Replace the throttle position sensor if it is found to be faulty, ensuring proper installation and calibration according to manufacturer guidelines.
- Clear the DTC from the ECM memory using a diagnostic scan tool and perform a test drive to verify that the issue has been resolved.
- If the problem persists, further diagnostics may be required to identify any underlying issues with the wiring, connectors, or ECM.
Cost to Fix P0123 2014 GMC Sierra
The cost of repairing a Throttle Position Sensor Circuit High Voltage issue can vary depending on the specific cause of the problem and the cost of parts and labor. In general, replacing a faulty throttle position sensor can range from $50 to $200, while the cost of labor can add an additional $80 to $150 per hour. Overall, the total repair cost for this issue could range from $150 to $500, but it is advisable to check with local auto repair shops for a more accurate estimate based on your location and vehicle specifics.
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