AutoCodes – MINI – P0123 MINI

P0123 MINI Code - Throttle/Pedal Position Sensor/Switch 'A' Circuit High

Quick Answer

The accelerator pedal position is monitored separately by 2 individual sensors. Common causes include Faulty Electromotive Throttle Actuator, Electromotive Throttle Actuator harness is open or shorted, Electromotive Throttle Actuator 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: P0123 MINI indicates Throttle/Pedal Position Sensor/Switch 'A' Circuit High.
Common causes: Common causes include Faulty Electromotive Throttle Actuator, Electromotive Throttle Actuator harness is open or shorted, Electromotive Throttle Actuator 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 4,717

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 15, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0123 MINI Description

The accelerator pedal position is monitored separately by 2 individual sensors. Two sensors are employed to provide redundancy, implement the monitoring function, and facilitate recognition of malfunctions. The sensors register accelerator-pedal travel as angular deflection, with data being transmitted directly to the engine-management control unit as analog linear voltage curves for the pedal angle. Overall pedal travel is mechanically expressed as 16° ±0.5°. Each change in the accelerator-pedal position is transmitted to the engine-management control unit with a maximum lag of 50 milliseconds. Sensor signals are transmitted in analog form. The engine-management control unit monitors the two input signals from the sensors and compares them for plausibility (factors such as mutual synchronicity, linearity, etc.). The Diagnostic Trouble Code (DTC) is detected when the voltage of the throttle valve sensor (1) exceeds the upper limit. Upper limit: 4.75 V.

OBDII Code P0123 MINI - Throttle/Pedal Position Sensor/Switch 'A' Circuit High - AutoCodes.com — P0123 MINI Code - Throttle/Pedal Position Sensor/Switch 'A' Circuit High

What does this mean?

What are the Possible Causes of the DTC P0123 MINI?

Faulty Electromotive Throttle Actuator
Electromotive Throttle Actuator harness is open or shorted
Electromotive Throttle Actuator circuit poor electrical connection

How to Fix the DTC P0123 MINI?

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 does this mean?

Code Tech Notes

BMW Diagnostic Trouble Code (DTC): 101001

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0123 MINI 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 P0123 MINI Code

1. What are the common symptoms of OBDII code P0123 in a MINI?

- Common symptoms include reduced engine power, hesitation or stalling when accelerating, and illuminated Check Engine light.

2. What does the OBDII code P0123 in a MINI indicate?

- The code indicates a high voltage signal from the throttle/pedal position sensor/switch 'A' circuit.

3. What are the possible causes of OBDII code P0123 in a MINI?

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

4. How can I diagnose the cause of OBDII code P0123 in my MINI?

- Diagnose the code by checking the throttle position sensor's voltage readings, inspecting the sensor's wiring and connectors for damage, and using a scan tool to monitor sensor data.

5. Can I continue driving my MINI with OBDII code P0123 present?

- It is not recommended to drive with the code present as it can lead to poor engine performance and potential further damage if left unresolved.

6. How can I repair OBDII code P0123 in my MINI?

- Repair the code by replacing the faulty throttle position sensor, repairing any damaged wiring or connectors, and clearing the code with a scan tool.

7. Will resetting the Check Engine light resolve OBDII code P0123 in my MINI?

- Resetting the light may temporarily turn it off, but the underlying issue causing the code will still need to be diagnosed and repaired.

8. How much does it typically cost to fix OBDII code P0123 in a MINI?

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

9. Are there any preventive maintenance measures to avoid OBDII code P0123 in a MINI?

- Regularly inspecting and maintaining the throttle position sensor, as well as ensuring the sensor's wiring is in good condition, can help prevent the code from occurring.

10. Can a DIY enthusiast repair OBDII code P0123 in a MINI?

- Depending on the individual's skill level and tools available, some DIY enthusiasts may be able to replace the throttle position sensor and perform basic diagnostics for this code.