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P0122 2003 Infiniti G35 Code - Throttle Position Sensor/Switch '1' Circuit Low Input

Quick Answer

The P0122 code on a 2003 Infiniti G35 indicates a problem with the Throttle Position Sensor/Switch '1' Circuit having a low input. Common causes include Faulty Throttle Position Sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or poor connections in the TPS circuit. 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 2003 Infiniti G35 indicates Throttle Position Sensor/Switch '1' Circuit Low Input.
Common causes
Common causes include Faulty Throttle Position Sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or poor connections in the TPS circuit.
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 Aug 30, 2024
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Code P0122 2003 Infiniti G35 Description

The P0122 code on a 2003 Infiniti G35 indicates a problem with the Throttle Position Sensor/Switch '1' Circuit having a low input. The throttle position sensor (TPS) is responsible for monitoring the position of the throttle valve and sending this information to the engine control module (ECM). The ECM uses this data to adjust fuel delivery and ignition timing to optimize engine performance. When the TPS circuit has a low input, it means that the voltage signal sent by the sensor is below the expected range, which can lead to incorrect fuel and ignition adjustments.

OBDII Code P0122 2003 Infiniti G35 - Throttle Position Sensor/Switch '1' Circuit Low Input
P0122 2003 Infiniti G35 Code - Throttle Position Sensor/Switch '1' Circuit Low Input

Common Causes of P0122 2003 Infiniti G35

  1. Faulty Throttle Position Sensor
  2. Damaged wiring or connectors in the TPS circuit
  3. Corrosion or poor connections in the TPS circuit
  4. Issues with the ECM or related components
  5. Environmental factors such as moisture or debris affecting the sensor

Symptoms of P0122 2003 Infiniti G35

  1. Poor acceleration and response
  2. Rough idling or stalling
  3. Decreased fuel efficiency
  4. Check Engine Light illuminated
  5. Transmission shifting issues

How to Fix P0122 2003 Infiniti G35

  1. Diagnose the issue by using a scan tool to retrieve the trouble code and checking the TPS circuit for any visible damage.
  2. Inspect the wiring and connectors for any signs of corrosion or disconnection.
  3. Test the Throttle Position Sensor using a multimeter to verify if it is functioning within the specified voltage range.
  4. Replace the Throttle Position Sensor if it fails the voltage test or shows signs of malfunction.
  5. Clear the trouble code and perform a test drive to ensure that the issue has been resolved.

Cost to Fix P0122 2003 Infiniti G35

The typical repair costs for addressing a Throttle Position Sensor/Switch '1' Circuit Low Input issue on a 2003 Infiniti G35 can range from $100 to $300 for parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to inquire with local shops for a more accurate estimate.

When is the Code Detected?

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

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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 2003 Infiniti G35 Code

1. What are the common symptoms of OBDII code P0122 on a 2003 Infiniti G35?

- Common symptoms include poor acceleration, sluggish throttle response, stalling at idle, and the vehicle going into "limp mode" to prevent further damage.

2. What does the OBDII code P0122 mean for a 2003 Infiniti G35?

- OBDII code P0122 indicates that there is a low input signal from the throttle position sensor or switch '1' circuit in the vehicle's electronic control system.

3. What are the possible causes of OBDII code P0122 on a 2003 Infiniti G35?

- Possible causes include a faulty throttle position sensor, damaged wiring or connectors in the circuit, a dirty throttle body, or issues with the engine control module.

4. How can I diagnose the throttle position sensor on a 2003 Infiniti G35 to address code P0122?

- You can use a multimeter to test the throttle position sensor's voltage output at different throttle positions, check the sensor's wiring and connectors for damage, and inspect the throttle body for any obstructions or dirt buildup.

5. What are some recommended repair tips for fixing OBDII code P0122 on a 2003 Infiniti G35?

- Start by cleaning the throttle body to ensure proper operation, inspect and repair any damaged wiring or connectors in the throttle position sensor circuit, and replace the throttle position sensor if necessary.

6. Can I continue driving my 2003 Infiniti G35 with OBDII code P0122 active?

- It is not recommended to continue driving with code P0122 active, as it can lead to poor engine performance, reduced fuel efficiency, and potential safety hazards. It is best to address the issue promptly.

7. Is it possible to reset the OBDII code P0122 on a 2003 Infiniti G35 without fixing the underlying issue?

- While you can clear the code using an OBDII scanner, it will likely reappear if the root cause of the problem, such as a faulty throttle position sensor, is not addressed.

8. How much does it typically cost to repair OBDII code P0122 on a 2003 Infiniti G35?

- The cost of repairing OBDII code P0122 can vary depending on the exact cause of the issue. Replacing a throttle position sensor can range from $100 to $300, while addressing wiring or connector problems may be less expensive.

9. Can a DIY enthusiast fix OBDII code P0122 on a 2003 Infiniti G35?

- Yes, some aspects of addressing code P0122, such as cleaning the throttle body or checking for damaged wiring, can be done by a DIY enthusiast with the necessary tools and knowledge. However, replacing components like the throttle position sensor may require more advanced skills.

10. How long does it typically take to repair OBDII code P0122 on a 2003 Infiniti G35?

- The repair time for OBDII code P0122 can vary depending on the exact cause of the issue and the expertise of the technician. Simple fixes like cleaning the throttle body may take an hour or two, while replacing the throttle position sensor could take several hours.

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