Engine-Codes.com
Engine-Codes – Pontiac – P0122 Pontiac

P0122 Pontiac Code - Throttle Position Sensor 1 Circuit Low Voltage

Quick Answer

The P0122 Pontiac code indicates a problem with the Throttle Position Sensor (TPS) 1 Circuit, specifically a low voltage condition. Common causes include Faulty Throttle Position Sensor, Damaged or corroded wiring/connectors in the TPS circuit, Issues with the ECM. 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 Pontiac indicates Throttle Position Sensor 1 Circuit Low Voltage.
Common causes
Common causes include Faulty Throttle Position Sensor, Damaged or corroded wiring/connectors in the TPS circuit, Issues with the ECM.
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 12, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0122 Pontiac Description

The P0122 Pontiac code indicates a problem with the Throttle Position Sensor (TPS) 1 Circuit, specifically a low voltage condition. The TPS is a crucial component of the engine management system, as it monitors the position of the throttle valve and sends this information to the Engine Control Module (ECM). The ECM uses this data to determine the appropriate fuel delivery and ignition timing for optimal engine performance.

OBDII Code P0122 Pontiac - Throttle Position Sensor 1 Circuit Low Voltage
P0122 Pontiac Code - Throttle Position Sensor 1 Circuit Low Voltage

Common Causes of P0122 Pontiac

  1. Faulty Throttle Position Sensor
  2. Damaged or corroded wiring/connectors in the TPS circuit
  3. Issues with the ECM
  4. Vacuum leaks affecting TPS operation
  5. Mechanical issues with the throttle body

Symptoms of P0122 Pontiac

  1. Rough idling or fluctuating idle speed
  2. Hesitation or lack of response when accelerating
  3. Poor fuel economy
  4. Engine misfires
  5. Illumination of the Check Engine Light

How to Fix P0122 Pontiac

  1. Begin by diagnosing the TPS circuit using a multimeter to test for voltage and resistance.
  2. Inspect the wiring and connectors for any signs of damage or corrosion, repairing or replacing as needed.
  3. Replace the Throttle Position Sensor if it is found to be faulty.
  4. Clear the diagnostic trouble codes from the ECM using a scan tool.
  5. Test drive the vehicle to ensure the issue has been resolved and the Check Engine Light does not reappear.

Cost to Fix P0122 Pontiac

The cost of repairing a Throttle Position Sensor 1 Circuit Low Voltage issue can vary depending on the specific vehicle make and model, as well as the labor rates in your area. On average, the parts for a TPS replacement can range from $50 to $150, while the labor costs can be between $100 and $200. Overall, you can expect to pay anywhere from $150 to $350 for this repair. It is recommended to obtain quotes from local auto repair shops to get a more accurate estimate based on your location and vehicle.

When is the Code Detected?

An excessively low voltage from the Throttle Position (TP) Sensor is sent to Engine Control Module (ECM).

Need more information about the P0122 Pontiac code?

Need more information on how to fix the P0122 Pontiac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0122 Pontiac code diagnosed by a professional: Find a repair shop in your area

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 Pontiac Code

1. What are common symptoms of OBDII code P0122 in a Pontiac related to the throttle position sensor?

The common symptoms include rough idling, poor acceleration, stalling, and potential issues with the transmission shifting smoothly.

2. What are the possible causes of OBDII code P0122 in a Pontiac indicating a low voltage throttle position sensor circuit?

Possible causes include a faulty throttle position sensor, damaged wiring or connectors, a corroded sensor connection, or issues with the sensor ground.

3. How can I diagnose the cause of OBDII code P0122 in my Pontiac related to the throttle position sensor?

You can diagnose the issue by checking the voltage output of the throttle position sensor, inspecting the wiring and connectors for any damage, and testing the sensor ground for continuity.

4. Can I drive my Pontiac with OBDII code P0122 indicating a low voltage throttle position sensor circuit?

It is not recommended to drive your Pontiac with this code as it can lead to poor performance, stalling, or even unsafe driving conditions.

5. Will resetting the OBDII code P0122 in my Pontiac fix the issue with the throttle position sensor?

Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue with the throttle position sensor circuit.

6. How can I repair OBDII code P0122 in my Pontiac caused by a low voltage throttle position sensor circuit?

Repairing this code typically involves replacing the throttle position sensor, repairing any damaged wiring or connectors, and ensuring a proper ground connection for the sensor.

7. Is it possible to clean the throttle position sensor to fix OBDII code P0122 in my Pontiac?

Cleaning the throttle position sensor may help in some cases, but if the code persists, it is recommended to replace the sensor for a more reliable fix.

8. Can a DIY enthusiast fix OBDII code P0122 in a Pontiac related to the throttle position sensor?

Depending on your skill level and access to tools, a DIY enthusiast may be able to diagnose and replace the throttle position sensor to address the P0122 code.

9. How much does it cost to repair OBDII code P0122 in a Pontiac at a professional auto repair shop?

The cost of repairing OBDII code P0122 can vary depending on the exact cause, but it typically ranges from $150 to $300 for parts and labor at a professional auto repair shop.

10. Will OBDII code P0122 in my Pontiac cause permanent damage if left unfixed?

Leaving OBDII code P0122 unfixed can potentially cause further damage to the engine or transmission over time, so it is advisable to address the issue promptly.

Discuss the causes and fixes for P0122 Pontiac OBDII Code

Submit a New Comment

Code P0122 Pontiac comments

No comments found for this page.