P2122 BMW Code - Throttle/Pedal Positio Sensor/Switch 'D' Circuit Low
Quick Answer
The accelerator pedal position is monitored separately by 2 individual sensors. Common causes include Faulty Accelerator Pedal, Accelerator Pedal harness is open or shorted, Accelerator Pedal 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
- P2122 BMW indicates Throttle/Pedal Positio Sensor/Switch 'D' Circuit Low.
- Common causes
- Common causes include Faulty Accelerator Pedal, Accelerator Pedal harness is open or shorted, Accelerator Pedal 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.
Code P2122 BMW Description
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 Digital Motor Electronics (DME) diagnosis the voltage at the Accelerator Pedal Module Pedal Sensor 1. The Diagnostic Trouble Code (DTC) is detected when there is a short circuit to ground.
What are the Possible Causes of the DTC P2122 BMW?
- Faulty Accelerator Pedal
- Accelerator Pedal harness is open or shorted
- Accelerator Pedal circuit poor electrical connection
- Faulty Accelerator Pedal Module
How to Fix the DTC P2122 BMW?
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 P2122 BMW 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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Frequently Asked Questions about P2122 BMW Code
1. What does the OBDII code P2122 mean on a BMW?
P2122 indicates a "Throttle/Pedal Position Sensor/Switch 'D' Circuit Low," meaning the engine control module (ECM) has detected a low voltage signal from the throttle or accelerator pedal position sensor.
2. What are the common symptoms of code P2122 in a BMW?
Symptoms may include reduced engine performance, limp mode activation, unresponsive throttle, difficulty accelerating, or the Check Engine Light being illuminated.
3. What causes the P2122 code in a BMW?
Common causes include a faulty throttle position sensor, damaged or corroded wiring, loose electrical connections, a failing accelerator pedal position sensor, or issues with the ECM.
4. Can I drive my BMW with the P2122 code?
Driving with the P2122 code is not recommended, as the car may enter limp mode or experience reduced throttle response, potentially leading to unsafe driving conditions.
5. How do I diagnose the P2122 code in my BMW?
Diagnosis involves using an OBDII scanner to confirm the code, visually inspecting wiring and connectors, testing the throttle and accelerator pedal position sensors, and checking for proper voltage and ground signals.
6. How can I fix the P2122 code on a BMW?
Repairs may include replacing a faulty throttle or accelerator pedal position sensor, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming or replacing the ECM if necessary.
7. How much does it cost to repair a P2122 code on a BMW?
Repair costs can vary, but replacing a position sensor typically costs between $100 and $400, while more extensive issues, such as ECM replacement, may cost $1,000 or more.
8. Can a dirty throttle body cause the P2122 code?
A dirty throttle body is unlikely to directly cause P2122, but it can contribute to throttle response issues. Cleaning it may help if other components are functioning properly.
9. Is the P2122 code covered under warranty for my BMW?
If your BMW is under warranty, the repair may be covered, especially if it involves defective components. Check with your dealer for details.
10. Can a low battery cause the P2122 code to appear?
A weak or failing battery can cause electrical voltage issues, which may trigger the P2122 code. Ensure the battery and charging system are in good condition during diagnosis.
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