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Engine-Codes – Jaguar – P0122 Jaguar

P0122 Jaguar Code - Throttle Position Sensor/Switch 'A' Circuit Low Input

Quick Answer

The P0122 Jaguar diagnostic trouble code (DTC) indicates an issue with the Throttle Position Sensor (TPS) or its circuit. Common causes include Faulty Throttle Position Sensor (TPS), Damaged wiring or connectors in the TPS circuit, Malfunctioning Engine Control Module (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 Jaguar indicates Throttle Position Sensor/Switch 'A' Circuit Low Input.
Common causes
Common causes include Faulty Throttle Position Sensor (TPS), Damaged wiring or connectors in the TPS circuit, Malfunctioning Engine Control Module (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
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Code P0122 Jaguar Description

The P0122 Jaguar diagnostic trouble code (DTC) indicates an issue with the Throttle Position Sensor (TPS) or its circuit. The TPS is a crucial component of the vehicle's electronic throttle control system, 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, optimizing engine performance and fuel efficiency.

OBDII Code P0122 Jaguar - Throttle Position Sensor/Switch 'A' Circuit Low Input
P0122 Jaguar Code - Throttle Position Sensor/Switch 'A' Circuit Low Input

Common Causes of P0122 Jaguar

  1. Faulty Throttle Position Sensor (TPS).
  2. Damaged wiring or connectors in the TPS circuit.
  3. Malfunctioning Engine Control Module (ECM).
  4. Dirty throttle body affecting TPS operation.
  5. Vacuum leak affecting TPS readings.

Symptoms of P0122 Jaguar

  1. Poor acceleration or lack of response when pressing the gas pedal.
  2. Rough idling or engine stalling.
  3. Engine hesitation or surging during acceleration.
  4. Reduced fuel efficiency.
  5. Illumination of the Check Engine Light.

How to Fix P0122 Jaguar

  1. Begin by diagnosing the issue using a scan tool to confirm the P0122 code and identify the specific cause.
  2. Inspect the TPS, wiring, and connectors for any visible damage or corrosion. Replace any faulty components.
  3. Clean the throttle body to ensure proper TPS operation.
  4. Test the TPS voltage output and adjust if necessary to meet manufacturer specifications.
  5. Clear the DTC and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P0122 Jaguar

The typical repair costs for addressing a P0122 Jaguar code can vary depending on the specific cause of the issue. In general, replacing a faulty Throttle Position Sensor can cost between $50 and $200, while repairing damaged wiring or connectors may range from $100 to $300. If the ECM needs to be replaced, the cost can be significantly higher, potentially exceeding $500. Labor costs can also vary, with rates typically ranging between $80 and $150 per hour. It is advisable to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on the specific circumstances of the vehicle.

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 Jaguar Code

1. What are the common symptoms of OBDII code P0122 in a Jaguar related to the Throttle Position Sensor/Switch 'A' Circuit Low Input?

The common symptoms include poor acceleration, stalling, rough idling, and difficulty maintaining a consistent speed.

2. What are the possible causes of OBDII code P0122 in a Jaguar?

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

3. How can I diagnose the Throttle Position Sensor/Switch 'A' Circuit Low Input issue in my Jaguar?

You can diagnose the issue by using an OBDII scanner to retrieve the specific fault code, testing the throttle position sensor for proper voltage output, and inspecting the sensor circuit for any visible damage.

4. Can I drive my Jaguar with OBDII code P0122 present?

It is not recommended to drive with this code present, as it can lead to further damage to the engine or affect the vehicle's performance and drivability.

5. How can I repair OBDII code P0122 in my Jaguar?

Repair options include replacing the throttle position sensor, repairing or replacing damaged wiring or connectors, and resetting the fault code using an OBDII scanner.

6. Is it possible to reset OBDII code P0122 in a Jaguar without fixing the underlying issue?

Resetting the code without fixing the underlying issue may temporarily clear the warning light, but the problem will likely reoccur if the root cause is not addressed.

7. Can a DIY enthusiast fix OBDII code P0122 in a Jaguar, or should I seek professional help?

While some DIY enthusiasts may be able to replace the throttle position sensor or check for wiring issues, it is recommended to seek professional help for a thorough diagnosis and repair.

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

The cost of repairing this code can vary depending on the specific 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 Jaguar?

Regular maintenance checks, such as inspecting the throttle position sensor during routine servicing, can help prevent issues that lead to OBDII code P0122.

10. How long does it take to repair OBDII code P0122 in a Jaguar?

The repair time can vary depending on the complexity of the issue and the availability of parts, but it typically takes a few hours to a day for a skilled mechanic to diagnose and fix the problem.

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