AutoCodes – Nissan – P0122 2008 Nissan Sentra

P0122 2008 Nissan Sentra Code - Throttle Position Sensor/Switch 'A' Circuit Low Input

Quick Answer

The Throttle Pedal Position (TPP) responds to the accelerator pedal movement. Common causes include Faulty throttle position sensor 2, Throttle position sensor 2 harness is open or shorted, Throttle position sensor 2 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 2008 Nissan Sentra indicates Throttle Position Sensor/Switch 'A' Circuit Low Input.
Common causes: Common causes include Faulty throttle position sensor 2, Throttle position sensor 2 harness is open or shorted, Throttle position sensor 2 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 6,934

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 Apr 01, 2024

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0122 2008 Nissan Sentra 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 2008 Nissan Sentra - Throttle Position Sensor/Switch 'A' Circuit Low Input - AutoCodes.com — P0122 2008 Nissan Sentra Code - Throttle Position Sensor/Switch 'A' Circuit Low Input

What does this mean?

What are the Possible Causes of the DTC P0122 2008 Nissan Sentra?

Faulty throttle position sensor 2
Throttle position sensor 2 harness is open or shorted
Throttle position sensor 2 circuit poor electrical connection

How to Fix the DTC P0122 2008 Nissan Sentra?

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 2008 Nissan Sentra 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.

Need more information about the P0122 2008 Nissan Sentra code?

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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 2008 Nissan Sentra Code

1. What are the common symptoms of OBDII code P0122 in a 2008 Nissan Sentra?

- Common symptoms include poor acceleration, stalling, rough idling, and problems shifting gears.

2. What does the OBDII code P0122 in a 2008 Nissan Sentra indicate?

- The code P0122 indicates an issue with the Throttle Position Sensor/Switch 'A' Circuit Low Input.

3. What are the possible causes of OBDII code P0122 in a 2008 Nissan Sentra?

- Possible causes include a faulty throttle position sensor, damaged wiring or connectors, or a problem with the engine control module (ECM).

4. How can I diagnose the cause of OBDII code P0122 in my 2008 Nissan Sentra?

- You can use a diagnostic scanner to read the code and check the throttle position sensor's voltage using a multimeter to pinpoint the issue.

5. Can I still drive my 2008 Nissan Sentra with OBDII code P0122?

- It is not recommended to drive the vehicle with code P0122 as it can lead to poor engine performance and potential safety hazards.

6. How can I repair OBDII code P0122 in my 2008 Nissan Sentra?

- Repair options include replacing the throttle position sensor, repairing damaged wiring or connectors, or reprogramming the ECM.

7. Is it possible to reset OBDII code P0122 in a 2008 Nissan Sentra without fixing the issue?

- Resetting the code without fixing the underlying problem may temporarily clear the check engine light, but the issue will likely reappear.

8. How much does it typically cost to repair OBDII code P0122 in a 2008 Nissan Sentra?

- The cost of repair can vary depending on the cause of the issue, but it may range from $100 to $300 for parts and labor.

9. Are there any preventive measures to avoid OBDII code P0122 in a 2008 Nissan Sentra?

- Regular maintenance, such as checking and cleaning the throttle body, can help prevent issues with the throttle position sensor.

10. Can a DIY enthusiast fix OBDII code P0122 in a 2008 Nissan Sentra?

- Depending on your skill level and access to tools, you may be able to replace the throttle position sensor yourself, but diagnosing and repairing wiring issues or ECM problems may require professional help.