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Engine-Codes – Chevrolet – P2128 2016 Chevrolet Silverado

P2128 2016 Chevrolet Silverado Code - Accelerator Pedal Position Sensor 2 Circuit High Voltage

Quick Answer

The P2128 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado refers to the Accelerator Pedal Position Sensor 2 Circuit High Voltage. Common causes include Faulty accelerator pedal position sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or poor connections in the sensor 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
P2128 2016 Chevrolet Silverado indicates Accelerator Pedal Position Sensor 2 Circuit High Voltage.
Common causes
Common causes include Faulty accelerator pedal position sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or poor connections in the sensor 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 16, 2024
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Code P2128 2016 Chevrolet Silverado Description

The P2128 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado refers to the Accelerator Pedal Position Sensor 2 Circuit High Voltage. This code indicates that there is a high voltage condition detected in the circuit that controls the accelerator pedal position sensor 2. The accelerator pedal position sensor is a crucial component of the vehicle's electronic throttle control system, which regulates the engine's throttle opening based on the driver's input through the accelerator pedal.

OBDII Code P2128 2016 Chevrolet Silverado - Accelerator Pedal Position Sensor 2 Circuit High Voltage
P2128 2016 Chevrolet Silverado Code - Accelerator Pedal Position Sensor 2 Circuit High Voltage

Common Causes of P2128 2016 Chevrolet Silverado

  1. Faulty accelerator pedal position sensor
  2. Damaged wiring or connectors in the sensor circuit
  3. Corrosion or poor connections in the sensor circuit
  4. Issues with the engine control module (ECM)
  5. Electrical interference or short circuits in the sensor circuit

Symptoms of P2128 2016 Chevrolet Silverado

  1. Engine hesitation or lack of response when accelerating
  2. Reduced engine power or performance
  3. Check Engine Light illuminated on the dashboard
  4. Vehicle going into limp mode
  5. Difficulty maintaining a consistent speed while driving

How to Fix P2128 2016 Chevrolet Silverado

  1. Begin by connecting a diagnostic scanner to the vehicle's OBD-II port to retrieve the specific trouble code and confirm the high voltage condition in the accelerator pedal position sensor 2 circuit.
  2. Inspect the wiring and connectors in the sensor circuit for any damage, corrosion, or poor connections. Repair or replace any faulty components as needed.
  3. Test the accelerator pedal position sensor 2 using a multimeter to check for proper voltage readings. Replace the sensor if it is found to be faulty.
  4. Clear the DTC from the vehicle's ECM using the diagnostic scanner and perform a test drive to ensure that the issue has been resolved.
  5. If the repair steps do not resolve the high voltage condition, further diagnosis may be necessary to identify any underlying issues with the ECM or other related components.

Cost to Fix P2128 2016 Chevrolet Silverado

The typical repair costs for addressing a P2128 code on a 2016 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, the cost of parts such as a new accelerator pedal position sensor and any necessary wiring or connectors can range from $100 to $300. Labor costs at auto repair shops typically range from $80 to $150 per hour, with the total repair time varying based on the complexity of the issue and the technician's expertise.

What does this mean?

Tech Notes for P2128 2016 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 P2128 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P2128 in a 2016 Chevrolet Silverado?

The common symptoms of code P2128 include the Check Engine Light being illuminated on the dashboard, reduced engine power, and potential issues with acceleration.

2. What does the OBDII code P2128 in a 2016 Chevrolet Silverado indicate?

Code P2128 specifically points to a fault in the Accelerator Pedal Position Sensor 2 Circuit, indicating a high voltage condition.

3. What are the possible causes of OBDII code P2128 in a 2016 Chevrolet Silverado?

Potential causes of code P2128 include a faulty accelerator pedal position sensor, wiring or connector issues, a malfunctioning throttle body, or problems with the engine control module.

4. How serious is OBDII code P2128 in a 2016 Chevrolet Silverado?

Code P2128 should be addressed promptly as it can lead to reduced vehicle performance, safety concerns, and potential damage to other engine components if left unresolved.

5. Can I continue driving my 2016 Chevrolet Silverado with OBDII code P2128?

It is not recommended to continue driving the vehicle with code P2128 present, as it can result in unsafe driving conditions and further damage to the engine if not repaired.

6. How can I diagnose OBDII code P2128 in my 2016 Chevrolet Silverado?

Diagnosing code P2128 typically involves using a diagnostic scanner to retrieve the code, testing the accelerator pedal position sensor and related components, and inspecting wiring for any visible issues.

7. What are some repair tips for fixing OBDII code P2128 in a 2016 Chevrolet Silverado?

Repair tips for addressing code P2128 may include replacing the accelerator pedal position sensor, repairing or replacing damaged wiring or connectors, cleaning the throttle body, and ensuring proper connection to the engine control module.

8. Can I reset the Check Engine Light after fixing OBDII code P2128 in my 2016 Chevrolet Silverado?

Yes, once the underlying issue causing code P2128 is resolved, the Check Engine Light can be reset using a diagnostic scanner to clear the code from the vehicle's system.

9. How much does it cost to repair OBDII code P2128 in a 2016 Chevrolet Silverado?

The cost of repairing code P2128 can vary depending on the exact cause of the issue, but it may involve expenses for parts such as the accelerator pedal position sensor, labor costs for diagnosis and repair, and potential additional components if needed.

10. Can a DIY enthusiast fix OBDII code P2128 in a 2016 Chevrolet Silverado?

While some experienced DIY enthusiasts may be able to address code P2128 themselves, it is recommended to consult a professional mechanic for proper diagnosis and repair to ensure the issue is resolved correctly.

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