AutoCodes – Audi – P0122 Audi

P0122 Audi Code - Throttle Pedal Position Sensor/Switch 'A' Circuit Low

Quick Answer

The throttle position sensor (TPS) 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 Audi indicates Throttle Pedal Position Sensor/Switch 'A' Circuit Low.
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 16,767

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 Audi Description

The throttle position sensor (TPS) 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 Audi - Throttle Pedal Position Sensor/Switch 'A' Circuit Low - AutoCodes.com — P0122 Audi Code - Throttle Pedal Position Sensor/Switch 'A' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0122 Audi?

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 Audi?

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 Audi 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 Audi Code

1. What are common symptoms of OBDII code P0122 in an Audi?

- Common symptoms include reduced engine power, hesitation or stalling when accelerating, and the vehicle going into limp mode.

2. What does the OBDII code P0122 in an Audi indicate?

- The code P0122 indicates an issue with the Throttle Pedal Position Sensor/Switch 'A' Circuit registering a low voltage signal.

3. What are some possible causes of OBDII code P0122 in an Audi?

- Possible causes include a faulty throttle pedal position sensor, damaged wiring or connectors in the sensor circuit, or a malfunctioning Engine Control Module (ECM).

4. How can I diagnose the cause of OBDII code P0122 in my Audi?

- Diagnosis typically involves using a scan tool to read the code, checking the throttle pedal sensor for proper operation, inspecting wiring for damage, and testing the ECM for faults.

5. Can I continue driving my Audi with OBDII code P0122 present?

- It is not recommended to drive the vehicle with code P0122 as it can lead to unsafe driving conditions and potential damage to other engine components.

6. How can I repair OBDII code P0122 in my Audi?

- Repair options may include replacing the throttle pedal position sensor, repairing damaged wiring, or reprogramming the ECM if necessary.

7. Will resetting the OBDII code P0122 in my Audi make it go away permanently?

- Resetting the code may temporarily clear the warning light, but the underlying issue causing the code needs to be properly diagnosed and repaired to prevent it from reoccurring.

8. Can a DIY enthusiast fix OBDII code P0122 in an Audi?

- Depending on the root cause of the code, some DIY enthusiasts may be able to replace the throttle pedal position sensor or repair wiring themselves, but more complex issues may require professional assistance.

9. How long does it typically take to repair OBDII code P0122 in an Audi?

- The repair time can vary based on the specific cause of the code, but it may take anywhere from 1 to 3 hours to diagnose and fix the issue.

10. Are there any preventive measures to avoid OBDII code P0122 in an Audi?

- Regular maintenance, such as checking and cleaning throttle components, inspecting wiring for damage, and addressing any warning signs early, can help prevent OBDII code P0122 from occurring.