AutoCodes – Pontiac – P0122 Pontiac

P0122 Pontiac Code - Throttle Position Sensor 1 Circuit Low Voltage

Quick Answer

The Throttle Pedal Position (TPP) responds to the accelerator pedal movement. Common causes include Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle position sensor circuit poor electrical connection. 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, Throttle position sensor harness is open or shorted, Throttle position sensor circuit poor electrical connection.
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 Popularity 14,381

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0122 Pontiac Description

The Throttle Pedal Position (TPP) responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module (ECM). In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM.
Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This sensor controls engine operation such as fuel cut. On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control.

OBDII Code P0122 Pontiac - Throttle Position Sensor 1 Circuit Low Voltage - AutoCodes.com — P0122 Pontiac Code - Throttle Position Sensor 1 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0122 Pontiac?

Faulty throttle position sensor
Throttle position sensor harness is open or shorted
Throttle position sensor circuit poor electrical connection

How to Fix the DTC P0122 Pontiac?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0122 Pontiac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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 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.