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Engine-Codes – MINI – P0122 MINI

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

Quick Answer

The P0122 MINI code indicates that the throttle position sensor or switch 'A' circuit is registering a low input signal. Common causes include Faulty throttle position sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or contamination in the sensor or 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 MINI indicates Throttle Position Sensor/Switch 'A' Circuit Low Input.
Common causes
Common causes include Faulty throttle position sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or contamination in the sensor or 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 Sep 12, 2024
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Code P0122 MINI Description

The P0122 MINI code indicates that the throttle position sensor or switch 'A' circuit is registering a low input signal. The throttle position sensor (TPS) is a crucial component of the vehicle's electronic throttle control system, responsible for monitoring the position of the throttle pedal and sending this information to the engine control module (ECM). The ECM uses this data to adjust the air-fuel mixture and ignition timing for optimal engine performance.

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

Common Causes of P0122 MINI

  1. Faulty throttle position sensor
  2. Damaged wiring or connectors in the TPS circuit
  3. Corrosion or contamination in the sensor or circuit
  4. Malfunctioning ECM
  5. Mechanical issues affecting the throttle body

Symptoms of P0122 MINI

  1. Poor acceleration and throttle response
  2. Rough idling or stalling
  3. Check Engine Light illuminated on the dashboard
  4. Reduced fuel efficiency
  5. Limited vehicle speed

How to Fix P0122 MINI

  1. Begin by conducting a thorough diagnostic scan to confirm the P0122 code and identify the specific cause of the low input signal.
  2. Inspect the throttle position sensor, wiring, and connectors for any visible damage, corrosion, or contamination. Replace or repair any faulty components.
  3. Test the TPS circuit using a multimeter to ensure proper voltage output within the specified range.
  4. If the issue persists, consider checking the throttle body for any mechanical problems that may be affecting the sensor's operation.
  5. Clear the fault codes, reset the ECM, and perform a test drive to verify that the issue has been resolved.

Cost to Fix P0122 MINI

The typical repair costs for addressing a P0122 MINI code can vary depending on the specific cause of the issue. In general, replacing a faulty throttle position sensor can cost between $100 and $300, including parts and labor. However, if additional components need to be replaced or if extensive diagnostic work is required, the total repair cost may increase.

What does this mean?

Tech Notes for P0122 MINI

BMW Diagnostic Trouble Code (DTC): 101002

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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 MINI Code

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

- Common symptoms include poor acceleration, rough idling, stalling, and difficulty maintaining a steady speed.

2. What are the potential causes of the Throttle Position Sensor/Switch 'A' Circuit Low Input code (P0122) in a MINI?

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

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

- You can use an OBDII scanner to read the error code and check the throttle position sensor's voltage readings using a multimeter to diagnose the problem.

4. Can I continue driving my MINI with OBDII code P0122 related to the Throttle Position Sensor/Switch 'A' Circuit Low Input?

- It is not recommended to drive with this code as it can lead to poor engine performance and potential safety hazards. It's best to address the issue promptly.

5. What are the repair options for fixing OBDII code P0122 in a MINI?

- Repair options include replacing the throttle position sensor, repairing or replacing damaged wiring or connectors, or reprogramming the engine control module if necessary.

6. Are there any simple DIY tips for addressing the Throttle Position Sensor/Switch 'A' Circuit Low Input code in my MINI?

- DIY tips include checking for loose or damaged wiring, cleaning the throttle body, and ensuring proper connection of the throttle position sensor.

7. How important is the Throttle Position Sensor/Switch 'A' Circuit for the overall performance of a MINI?

- The throttle position sensor is crucial for the engine's performance as it helps regulate fuel injection, ignition timing, and transmission shifting based on the driver's throttle input.

8. Can extreme weather conditions or driving habits contribute to triggering OBDII code P0122 in a MINI?

- Yes, extreme weather conditions, such as extreme cold or heat, as well as aggressive driving habits, can potentially affect the throttle position sensor and trigger the code.

9. Will resetting the OBDII code P0122 on my MINI make the issue go away permanently?

- Resetting the code may temporarily clear the error, but if the underlying issue causing the code is not addressed, it is likely to reappear.

10. How can regular maintenance help prevent OBDII code P0122 related to the Throttle Position Sensor/Switch 'A' Circuit Low Input in a MINI?

- Regular maintenance, including checking and cleaning the throttle body, inspecting wiring connections, and replacing worn-out sensors, can help prevent issues leading to code P0122.

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