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Engine-Codes – Generic – P16A2

P16A2 Code - Throttle Position Sensor Communication Circuit Performance

Quick Answer

The P16A2 diagnostic trouble code (DTC) specifically relates to the Throttle Position Sensor (TPS) Communication Circuit Performance. Common causes include Faulty Throttle Position Sensor, Wiring or connector issues in the TPS circuit, ECM software or hardware malfunctions. 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
P16A2 indicates Throttle Position Sensor Communication Circuit Performance.
Common causes
Common causes include Faulty Throttle Position Sensor, Wiring or connector issues in the TPS circuit, ECM software or hardware malfunctions.
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 08, 2024
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Code P16A2 Description

The P16A2 diagnostic trouble code (DTC) specifically relates to the Throttle Position Sensor (TPS) Communication Circuit Performance. The TPS is a crucial component in the electronic throttle control system, responsible for monitoring the position of the throttle pedal and sending this information to the engine control module (ECM). In this case, the code indicates that there is a performance issue with the communication circuit associated with the TPS. This can lead to a variety of performance issues with the vehicle, including rough idling, hesitation or lack of response when accelerating, poor fuel economy, and even stalling.

OBDII Code P16A2 - Throttle Position Sensor Communication Circuit Performance
P16A2 Code - Throttle Position Sensor Communication Circuit Performance

Common Causes of P16A2

  1. Faulty Throttle Position Sensor.
  2. Wiring or connector issues in the TPS circuit.
  3. ECM software or hardware malfunctions.
  4. Corrosion or damage to the TPS circuit.
  5. Poor electrical connections or grounding issues.

Symptoms of P16A2

  1. Rough idling or unstable engine RPM.
  2. Lack of throttle response or delayed acceleration.
  3. Poor fuel efficiency.
  4. Engine stalling or hesitation.
  5. Illumination of the check engine light.

How to Fix P16A2

  1. Begin by conducting a thorough inspection of the TPS circuit, checking for any visible damage or corrosion.
  2. Test the Throttle Position Sensor with a multimeter to ensure it is functioning within the manufacturer's specified parameters.
  3. Inspect the wiring harness and connectors for any signs of wear or damage, repairing or replacing as necessary.
  4. Clear the DTC from the ECM using a scan tool and perform a test drive to ensure the issue has been resolved.
  5. If the problem persists, consider consulting a professional technician for further diagnosis and potential replacement of the TPS or ECM.

Cost to Fix P16A2

The typical repair costs for addressing a Throttle Position Sensor Communication Circuit Performance issue can vary depending on the extent of the problem and the specific components that need to be replaced. In general, the cost of a new Throttle Position Sensor ranges from $50 to $200, while labor costs can range from $100 to $300. Therefore, the total repair bill for this issue may fall within the range of $150 to $500. It's important to note that these estimates are rough averages and can vary significantly based on the factors mentioned earlier, so it's advisable to consult with a local auto repair shop for a more accurate quote.

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Code P16A2 Information for Specific Makes

  • P16A2 Buick — Throttle Position Sensor Communication Circuit Performance
  • P16A2 Cadillac — Throttle Position Sensor Communication Circuit Performance
  • P16A2 Chevrolet — Throttle Position Sensor Communication Circuit Performance
  • P16A2 GMC — Throttle Position Sensor Communication Circuit Performance
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 P16A2 Code

1. What does the OBDII code P16A2 mean?

P16A2 indicates a communication performance issue in the throttle position sensor (TPS) circuit, which monitors the position of the throttle in the engine.

2. What are the common symptoms of code P16A2?

Symptoms may include reduced engine performance, poor acceleration, rough idling, or the vehicle going into limp mode.

3. What causes the P16A2 code to appear?

Common causes include a faulty throttle position sensor, damaged wiring or connectors in the TPS circuit, or issues with the engine control module (ECM).

4. How do I diagnose the P16A2 code?

Start by checking the wiring and connectors for damage or corrosion, test the throttle position sensor for proper operation, and scan for additional related codes.

5. Can I drive with the P16A2 code active?

While the vehicle may still be drivable, it can experience reduced performance and safety risks. It’s best to address the issue promptly.

6. How do I fix the P16A2 code?

Repairs may involve replacing the throttle position sensor, repairing or replacing damaged wiring, or reprogramming or replacing the ECM if necessary.

7. How much does it cost to fix the P16A2 code?

Repair costs vary but typically range from $150 to $400, depending on whether the throttle position sensor or other components need replacement.

8. Can a dirty throttle body cause the P16A2 code?

A dirty throttle body can sometimes affect throttle position sensor readings, so cleaning it may help resolve the issue if no other faults are found.

9. Does the P16A2 code always mean the sensor is bad?

Not necessarily. The issue could also stem from wiring problems, connectivity issues, or ECM malfunctions.

10. Will clearing the P16A2 code with a scanner fix the problem?

Clearing the code may temporarily turn off the check engine light, but the underlying issue must be resolved to prevent the code from returning.

Discuss the causes and fixes for P16A2 OBDII Code

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