P1124 BMW Code - Differential Pressure Sensor Intake Manifold Adaptation
Quick Answer
For a variable valve lift engine, the main function of the throttle body is to control the pressure in the intake manifold. Common causes include Faulty Differential Pressure Sensor, Differential Pressure Sensor harness is open or shorted, Differential Pressure Sensor 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
- P1124 BMW indicates Differential Pressure Sensor Intake Manifold Adaptation.
- Common causes
- Common causes include Faulty Differential Pressure Sensor, Differential Pressure Sensor harness is open or shorted, Differential Pressure Sensor 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 P1124 BMW Description
The set-point of the differential intake manifold pressure is up to 60-70% of maximum torque request constant 5 kPa beneath ambient pressure. At a higher load, the differential pressure setpoint becomes Zero.
In case the set-point of the differential pressure in the intake manifold is > 3 kPa beneath the ambient pressure, a differential pressure controller is active. The output of the controller is monitored. The output of the manifold pressure controller has to be between adjustable MIN/MAX-thresholds. If the MIN/MAX thresholds are exceeded a time counter is incremented. After this counter reaches the threshold within one diagnosis cycle, a manifold differential pressure sensor malfunction is detected.
The Engine Control Module (ECM) monitors the Differential Pressure Sensor Intake Manifold Adaptation. The Diagnostic Trouble Code (DTC) will be set when the ECM receives an implausible signal from the Differential Pressure Sensor.
What are the Possible Causes of the DTC P1124 BMW?
- Faulty Differential Pressure Sensor
- Differential Pressure Sensor harness is open or shorted
- Differential Pressure Sensor circuit poor electrical connection
How to Fix the DTC P1124 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 P1124 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 P1124 BMW Code
1. What are the common symptoms of OBDII code P1124 in a BMW related to the Differential Pressure Sensor Intake Manifold Adaptation?
- Common symptoms may include rough idling, engine misfires, lack of power, and an illuminated check engine light.
2. What typically causes the OBDII code P1124 in a BMW?
- The code P1124 is often triggered by a faulty differential pressure sensor in the intake manifold or issues with the intake manifold itself.
3. How can I diagnose the OBDII code P1124 in my BMW?
- Diagnosis usually involves using a diagnostic scanner to read the code, checking the differential pressure sensor's readings, and inspecting the intake manifold for any signs of damage or leaks.
4. Can a dirty or clogged air filter cause the OBDII code P1124 in a BMW?
- Yes, a dirty or clogged air filter can restrict airflow to the intake manifold, leading to incorrect pressure readings and potentially triggering the code P1124.
5. What are some repair tips for resolving the OBDII code P1124 in a BMW?
- Repair tips may include cleaning or replacing the differential pressure sensor, inspecting and repairing any intake manifold leaks, and ensuring proper airflow through the intake system.
6. Is it safe to continue driving my BMW with the OBDII code P1124 present?
- It is generally not recommended to drive your BMW with the code P1124 present, as it can lead to poor engine performance and potentially cause further damage if left unresolved.
7. Can I reset the OBDII code P1124 in my BMW using a simple OBDII scanner?
- While you can reset the code using an OBDII scanner, it is important to diagnose and address the underlying issue causing the code to prevent it from reoccurring.
8. How much does it typically cost to repair the OBDII code P1124 in a BMW at a dealership or a local mechanic?
- Repair costs can vary depending on the exact cause of the code, but it may range from a few hundred to over a thousand dollars, including parts and labor.
9. Are there any preventative maintenance steps I can take to avoid encountering the OBDII code P1124 in my BMW?
- Regularly inspecting and replacing the air filter, maintaining the intake system, and following the manufacturer's recommended service schedule can help prevent issues leading to the code P1124.
10. Can a DIY enthusiast with basic automotive knowledge attempt to fix the OBDII code P1124 in a BMW?
- While some repairs related to the code P1124 may be DIY-friendly, it is recommended to have a certain level of expertise and access to proper tools to ensure the issue is resolved correctly and safely.
Discuss the causes and fixes for P1124 BMW OBDII Code
-
On this vehicle the client is complaining of heavy fuel consumption in town.
MAP pressre at idling is 350mbar, OK.
Airmass at idle 10.5g/s which is too high.
Maybe the ECU reads the corrolation between air intake volume and MAP pressure not OK and therefore throws a Differential pressure sensor intake manifold fault code?
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