P1250 – BMW DTC

BMW DTC P1250 – Manifold Absolute Pressure Too High

DTC P1250 meaning on BMW

DTC P1250 on a BMW indicates that the Manifold Absolute Pressure (MAP) sensor is detecting a pressure reading that is higher than the expected range. The MAP sensor measures the pressure inside the intake manifold and helps the engine control unit (ECU) determine the correct air-fuel mixture for combustion.

BMW DTC P1250 symptoms

Symptoms of DTC P1250 on a BMW may include:

• Check Engine Light (CEL) illuminated on the dashboard
• Reduced engine performance
• Engine hesitation or stalling
• Increased fuel consumption

BMW DTC P1250 causes

The common causes of DTC P1250 on a BMW include:

• Faulty MAP sensor
• Vacuum leaks in the intake system
• Incorrectly installed or damaged intake manifold gasket
• Issues with the ECU or wiring related to the MAP sensor

BMW DTC P1250 seriousness

While DTC P1250 may not cause immediate engine failure, it can lead to poor engine performance and reduced fuel efficiency. Ignoring this issue can potentially cause further damage to engine components over time.

How to diagnose DTC P1250 on BMW

To diagnose DTC P1250 on a BMW, you can perform the following steps:

1. Use an OBD-II scanner to retrieve the fault code and check for any other related codes.
2. Inspect the MAP sensor and its wiring for any visible damage or loose connections.
3. Check for vacuum leaks in the intake system using a smoke machine or by visually inspecting the hoses and connections.
4. Perform a thorough inspection of the intake manifold gasket for any signs of wear or leaks.

How to fix DTC P1250 on BMW

To fix DTC P1250 on a BMW, you can try the following solutions:

1. Replace the faulty MAP sensor with a new one.
2. Repair any vacuum leaks in the intake system and ensure all connections are secure.
3. Inspect and replace the intake manifold gasket if necessary.
4. If the issue persists, consult a professional mechanic for further diagnosis and repair.

How to erase DTC P1250 on BMW

To erase DTC P1250 on a BMW, you can use an OBD-II scanner to clear the fault code from the ECU’s memory. After fixing the underlying issue causing the fault code, clearing the code will reset the Check Engine Light and monitor the system for any new faults.

Recommended tools & DTC Scanners for BMW

Best Diagnostic App for modern BMWs: BimmerLink

Recommended Bluetooth adapter for Bimmerlink: OBDLink CX

Cable adapter for Bimmerlink: Enet Cable USB Type C

For older BMWs we recommend: Autel AutoLink AL319 (2024 version)

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

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