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Engine-Codes – Chevrolet – P0122 2018 Chevrolet Silverado

P0122 2018 Chevrolet Silverado Code - Throttle Position Sensor 1 Circuit Low Voltage

Quick Answer

The P0122 diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado indicates a problem with the Throttle Position Sensor (TPS) 1 Circuit having low voltage. Common causes include Faulty Throttle Position Sensor (TPS), Damaged or corroded wiring in the TPS circuit, Loose or poor connections 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
P0122 2018 Chevrolet Silverado indicates Throttle Position Sensor 1 Circuit Low Voltage.
Common causes
Common causes include Faulty Throttle Position Sensor (TPS), Damaged or corroded wiring in the TPS circuit, Loose or poor connections 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code P0122 2018 Chevrolet Silverado Description

The P0122 diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado indicates a problem with the Throttle Position Sensor (TPS) 1 Circuit having 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). This data is used by the ECM to determine the appropriate air-fuel mixture for optimal engine performance.

OBDII Code P0122 2018 Chevrolet Silverado - Throttle Position Sensor 1 Circuit Low Voltage
P0122 2018 Chevrolet Silverado Code - Throttle Position Sensor 1 Circuit Low Voltage

Common Causes of P0122 2018 Chevrolet Silverado

  1. Faulty Throttle Position Sensor (TPS).
  2. Damaged or corroded wiring in the TPS circuit.
  3. Loose or poor connections in the TPS circuit.
  4. Issues with the ECM receiving the TPS signal.
  5. Environmental factors such as moisture or debris affecting the TPS operation.

Symptoms of P0122 2018 Chevrolet Silverado

  1. Poor acceleration or hesitation when pressing the throttle pedal.
  2. Rough idling or stalling when coming to a stop.
  3. Reduced fuel efficiency and increased fuel consumption.
  4. Check Engine Light illuminated on the dashboard.
  5. Limited engine power or speed restrictions while driving.

How to Fix P0122 2018 Chevrolet Silverado

  1. Begin by diagnosing the TPS circuit using a multimeter to test for voltage and resistance.
  2. Inspect the TPS sensor for any signs of damage or wear, replacing it if necessary.
  3. Check the wiring and connectors in the TPS circuit for any damage or corrosion, repairing or replacing as needed.
  4. Clear the DTC from the ECM using a diagnostic scanner and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying issues with the ECM or other related components.

Cost to Fix P0122 2018 Chevrolet Silverado

The typical repair costs for addressing a P0122 code on a 2018 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, replacing a faulty Throttle Position Sensor (TPS) can range from $50 to $200, depending on the brand and quality of the part. Labor costs can add an additional $100 to $200, with total repair costs typically falling between $150 and $400.

What does this mean?

Tech Notes for P0122 2018 Chevrolet Silverado









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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0122 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P0122 in a 2018 Chevrolet Silverado?

The common symptoms include poor acceleration, stalling, rough idling, and the vehicle going into limp mode.

2. What does the OBDII code P0122 indicate in a 2018 Chevrolet Silverado?

The code P0122 indicates an issue with the Throttle Position Sensor 1 Circuit, specifically low voltage being detected by the vehicle's onboard diagnostics system.

3. What are the possible causes of OBDII code P0122 in a 2018 Chevrolet Silverado?

Possible causes of P0122 include a faulty throttle position sensor, damaged wiring or connectors in the circuit, or issues with the vehicle's ECM (Engine Control Module).

4. How can I diagnose the cause of OBDII code P0122 in my 2018 Chevrolet Silverado?

To diagnose P0122, you can use a scan tool to read the code and check the voltage output of the throttle position sensor. Inspect the wiring and connectors for any damage or corrosion as well.

5. Can I drive my 2018 Chevrolet Silverado with OBDII code P0122?

It is not recommended to drive your vehicle with P0122 as it can lead to poor performance and potential safety hazards. It's best to address the issue promptly.

6. How can I repair OBDII code P0122 in my 2018 Chevrolet Silverado?

Repairing P0122 may involve replacing the throttle position sensor, repairing any damaged wiring or connectors, or resetting the ECM to clear the code.

7. Will resetting the ECM clear OBDII code P0122 in a 2018 Chevrolet Silverado?

Resetting the ECM may temporarily clear the code, but if the underlying issue causing P0122 is not resolved, the code is likely to reappear.

8. Can a dirty throttle body cause OBDII code P0122 in a 2018 Chevrolet Silverado?

While a dirty throttle body can affect throttle response, P0122 specifically points to issues with the throttle position sensor circuit rather than the throttle body itself.

9. How much does it cost to fix OBDII code P0122 in a 2018 Chevrolet Silverado?

The cost to fix P0122 can vary depending on the exact cause of the issue. It may range from a few hundred dollars for parts and labor to over a thousand if more extensive repairs are needed.

10. Is OBDII code P0122 a common issue in 2018 Chevrolet Silverado vehicles?

While not extremely common, P0122 can occur in 2018 Chevrolet Silverado vehicles due to various factors like sensor wear, wiring issues, or ECM malfunctions. Regular maintenance can help prevent such issues.

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