P0122 2017 GMC Sierra Code - Throttle Position Sensor 1 Circuit Low Voltage
Quick Answer
The P0122 diagnostic trouble code (DTC) for a 2017 GMC Sierra relates to the Throttle Position Sensor (TPS) 1 Circuit registering low voltage. Common causes include Worn or damaged throttle position sensor, Corrosion or poor electrical connection in the TPS wiring harness, Faulty ECM or related control module. 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 2017 GMC Sierra indicates Throttle Position Sensor 1 Circuit Low Voltage.
- Common causes
- Common causes include Worn or damaged throttle position sensor, Corrosion or poor electrical connection in the TPS wiring harness, Faulty ECM or related control module.
- 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 2017 GMC Sierra Description
The P0122 diagnostic trouble code (DTC) for a 2017 GMC Sierra relates to the Throttle Position Sensor (TPS) 1 Circuit registering low voltage. The 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 adjust the air-fuel mixture and ignition timing for optimal engine performance.
Common Causes of P0122 2017 GMC Sierra
- Worn or damaged throttle position sensor.
- Corrosion or poor electrical connection in the TPS wiring harness.
- Faulty ECM or related control module.
- Mechanical issues affecting the throttle body's operation.
- Environmental factors such as extreme temperatures affecting sensor performance.
Symptoms of P0122 2017 GMC Sierra
- Poor acceleration or hesitation when pressing the gas pedal.
- Rough idling or stalling when at a stop.
- Decreased fuel efficiency.
- Check Engine Light illuminated on the dashboard.
- Limp mode activation, limiting the vehicle's speed and power.
How to Fix P0122 2017 GMC Sierra
- Begin by diagnosing the issue using a scan tool to retrieve the specific DTC and verify the TPS 1 Circuit low voltage condition.
- Inspect the TPS and its wiring harness for any visible damage, corrosion, or loose connections. Replace or repair as necessary.
- Test the TPS using a multimeter to ensure it is functioning within the manufacturer's specified parameters.
- If the TPS is deemed faulty, replace it with a new OEM or high-quality aftermarket sensor.
- Clear the DTC and perform a test drive to confirm that the issue has been resolved and that the vehicle is operating normally.
Cost to Fix P0122 2017 GMC Sierra
The typical repair costs for addressing a P0122 code on a 2017 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. Generally, replacing a throttle position sensor can range from $100 to $300, including parts and labor. However, additional diagnostic time and potential repairs may increase the overall cost. It is advisable to consult with a trusted mechanic or auto repair shop to obtain a more accurate estimate based on your vehicle's specific needs. Keep in mind that labor rates can vary widely, so it's essential to research local rates for a more precise cost estimate.
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Frequently Asked Questions about P0122 2017 GMC Sierra Code
1. What does the OBDII code P0122 mean for a 2017 GMC Sierra?
P0122 indicates that the Throttle Position Sensor (TPS) 1 circuit is experiencing low voltage, which may affect throttle and engine performance.
2. What are common symptoms of code P0122 in a 2017 GMC Sierra?
Symptoms may include poor acceleration, rough idle, reduced engine power, and the Check Engine Light turning on.
3. What causes the P0122 code to appear on a 2017 GMC Sierra?
Possible causes include a faulty throttle position sensor, damaged wiring or connectors, or issues with the engine control module (ECM).
4. Can I drive my 2017 GMC Sierra with a P0122 code?
It’s not recommended to drive with this code active as it can lead to reduced engine power and unsafe driving conditions.
5. How do I fix the P0122 code on a 2017 GMC Sierra?
Repairs may involve replacing the throttle position sensor, repairing damaged wiring, or cleaning electrical connections in the TPS circuit.
6. How do I test the throttle position sensor for code P0122?
You can use a multimeter to measure voltage at the TPS connector and ensure it falls within the manufacturer's specifications.
7. How much does it cost to repair the P0122 code on a 2017 GMC Sierra?
Throttle position sensor replacement can range from $100 to $300, depending on parts and labor costs.
8. Can a dirty throttle body cause the P0122 code on a 2017 GMC Sierra?
Yes, a dirty throttle body can affect sensor readings and contribute to low voltage issues.
9. Will clearing the P0122 code fix the issue permanently?
Clearing the code may temporarily remove the Check Engine Light, but the underlying problem must be addressed to prevent the code from returning.
10. Is P0122 a common problem for the 2017 GMC Sierra?
While not extremely common, issues with the throttle position sensor can occur over time due to wear or electrical problems.
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