P0122 2018 GMC Sierra Code - Throttle Position Sensor 1 Circuit Low Voltage
Quick Answer
The P0122 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates that the Throttle Position Sensor 1 Circuit is registering a low voltage. Common causes include Faulty throttle position sensor, Wiring issues or a poor connection in the TPS circuit, Corrosion or damage to the 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
- P0122 2018 GMC Sierra indicates Throttle Position Sensor 1 Circuit Low Voltage.
- Common causes
- Common causes include Faulty throttle position sensor, Wiring issues or a poor connection in the TPS circuit, Corrosion or damage to the 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 P0122 2018 GMC Sierra Description
The P0122 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates that the Throttle Position Sensor 1 Circuit is registering a low 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 air-fuel mixture for optimal engine performance.
Common Causes of P0122 2018 GMC Sierra
- Faulty throttle position sensor.
- Wiring issues or a poor connection in the TPS circuit.
- Corrosion or damage to the TPS connector.
- ECM software or hardware issues.
- Throttle body malfunction.
Symptoms of P0122 2018 GMC Sierra
- Poor acceleration or hesitation when pressing the throttle pedal.
- Rough idling or stalling when coming to a stop.
- Decreased fuel efficiency.
- Issues with shifting gears.
- Check Engine Light illuminated on the dashboard.
How to Fix P0122 2018 GMC Sierra
- Begin by diagnosing the issue with a scan tool to confirm the P0122 code and identify the specific cause.
- Inspect the throttle position sensor and its wiring for any visible damage or corrosion. Replace the sensor if necessary.
- Check the TPS connector for a secure connection and repair any wiring issues.
- Clear the DTC from the ECM memory and perform a throttle relearn procedure to recalibrate the sensor.
- Test drive the vehicle to ensure the issue has been resolved and the symptoms have been eliminated.
Cost to Fix P0122 2018 GMC Sierra
The typical repair costs for addressing a P0122 code on a 2018 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a faulty throttle position sensor can cost between $100 to $200 for the part, with additional labor costs ranging from $100 to $200. Overall, the total repair cost can range from $200 to $400. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check local rates for a more accurate estimate.
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