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Engine-Codes – BMW – P1122 BMW

P1122 BMW Code - Pedal Position 1 Low Input

Quick Answer

The P1122 BMW code indicates that there is a low input signal coming from pedal position 1. Common causes include Faulty accelerator pedal sensor, Wiring issues or poor connections in the pedal position sensor circuit, ECM software glitch or malfunction. 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
P1122 BMW indicates Pedal Position 1 Low Input.
Common causes
Common causes include Faulty accelerator pedal sensor, Wiring issues or poor connections in the pedal position sensor circuit, ECM software glitch or malfunction.
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 10, 2024
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Code P1122 BMW Description

The P1122 BMW code indicates that there is a low input signal coming from pedal position 1. In other words, the signal sent by the accelerator pedal sensor is weaker than expected by the Engine Control Module (ECM). This can lead to a variety of issues with the vehicle's performance, as the ECM relies on this input to determine how much fuel and air to deliver to the engine for optimal combustion.

OBDII Code P1122 BMW - Pedal Position 1 Low Input
P1122 BMW Code - Pedal Position 1 Low Input

Common Causes of P1122 BMW

  1. Faulty accelerator pedal sensor.
  2. Wiring issues or poor connections in the pedal position sensor circuit.
  3. ECM software glitch or malfunction.
  4. Throttle body issues affecting communication with the pedal position sensor.
  5. Environmental factors such as moisture or corrosion affecting sensor performance.

Symptoms of P1122 BMW

  1. Poor acceleration or lack of response when pressing the accelerator pedal.
  2. Engine stalling or rough idling.
  3. Reduced engine power.
  4. Check Engine Light illuminated on the dashboard.
  5. Difficulty starting the vehicle.

How to Fix P1122 BMW

  1. Begin by performing a visual inspection of the accelerator pedal sensor and its wiring connections. Look for any signs of damage or corrosion.
  2. Use a multimeter to test the output voltage of the accelerator pedal sensor. Compare the readings to the manufacturer's specifications.
  3. If the sensor is faulty, replace it with a new one. Ensure to calibrate the new sensor according to the manufacturer's guidelines.
  4. Check the wiring harness for any faults and repair or replace as necessary.
  5. Clear the diagnostic trouble codes from the ECM and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix P1122 BMW

The cost of repairing the P1122 BMW code can vary depending on the specific cause of the issue. Typically, replacing a faulty accelerator pedal sensor can cost between $100 and $300, including parts and labor. Additional costs may apply if wiring repairs or ECM reprogramming are necessary. It's important to consult with a professional mechanic to get an accurate estimate based on the specific circumstances of your vehicle. Labor rates at auto repair shops can range from $80 to $150 per hour, so be sure to factor this into your overall repair budget.

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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 P1122 BMW Code

1. What are the common symptoms of OBDII code P1122 in a BMW related to Pedal Position 1 Low Input?

The common symptoms include poor engine performance, reduced power, engine stalling, and the illumination of the Check Engine Light.

2. What are the possible causes of OBDII code P1122 in a BMW indicating Pedal Position 1 Low Input?

The code may be triggered by a faulty accelerator pedal position sensor, issues with the throttle body, wiring or connector problems, or a problem with the electronic control module.

3. How can I diagnose the reason behind OBDII code P1122 in my BMW?

Diagnosing the issue may involve checking the accelerator pedal position sensor for proper operation, inspecting the throttle body for any defects, and conducting a thorough examination of the wiring and connectors associated with the system.

4. Can I continue driving my BMW with OBDII code P1122 related to Pedal Position 1 Low Input?

It is not recommended to continue driving your vehicle with this code present, as it can lead to further damage and safety hazards. It is advisable to address the issue promptly.

5. What are some repair tips for fixing OBDII code P1122 in a BMW?

Repairing this code may involve replacing the accelerator pedal position sensor, repairing or replacing the throttle body, checking and repairing any wiring issues, and resetting the fault code with a diagnostic tool.

6. How much does it typically cost to repair OBDII code P1122 in a BMW?

The cost of repairing this code can vary depending on the specific cause of the issue, the labor rates of the repair shop, and the cost of any replacement parts that may be needed.

7. Can a DIY enthusiast fix OBDII code P1122 in a BMW themselves?

While some experienced DIY enthusiasts may be able to address this issue themselves, it is recommended to consult a professional mechanic or technician for an accurate diagnosis and proper repair to ensure the issue is resolved correctly.

8. Is OBDII code P1122 a common problem in BMW vehicles?

While not extremely common, OBDII code P1122 related to Pedal Position 1 Low Input can occur in BMW vehicles, especially in older models or vehicles with high mileage.

9. Will resetting the OBDII code P1122 in my BMW make the issue go away?

Resetting the code may temporarily turn off the Check Engine Light, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is important to diagnose and repair the problem to prevent further issues.

10. How long does it typically take to repair OBDII code P1122 in a BMW?

The repair time can vary depending on the specific cause of the issue, the availability of parts, and the workload of the repair shop. In general, it may take a few hours to a full day to diagnose and repair this code.

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