P1241 – BMW DTC

BMW DTC P1241 – Secondary Upstream Manifold Air Pressure Sensor Signal Too Low at Full Load for Low Engine Speed

DTC P1241 meaning on BMW

The Diagnostic Trouble Code (DTC) P1241 on a BMW indicates that the Secondary Upstream Manifold Air Pressure Sensor is sending a signal that is too low at full load for low engine speed. This sensor is responsible for measuring the pressure in the intake manifold and providing feedback to the engine control module.

BMW DTC P1241 symptoms

Symptoms of DTC P1241 on a BMW may include:

• Reduced engine performance
• Poor fuel efficiency
• Engine misfires
• Check Engine Light (CEL) illuminated on the dashboard

BMW DTC P1241 causes

The causes of DTC P1241 on a BMW can vary, but common reasons include:

• Faulty Secondary Upstream Manifold Air Pressure Sensor
• Wiring or connector issues in the sensor circuit
• Intake manifold leaks
• Issues with the engine control module

BMW DTC P1241 seriousness

While DTC P1241 may not always result in immediate engine failure, it can lead to reduced performance and fuel efficiency. Ignoring this code can potentially cause further damage to the engine over time.

How to diagnose DTC P1241 on BMW

To diagnose DTC P1241 on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault code
2. Inspect the Secondary Upstream Manifold Air Pressure Sensor and its wiring for any visible damage
3. Check for any intake manifold leaks
4. Test the sensor’s output using a multimeter

How to fix DTC P1241 on BMW

To fix DTC P1241 on a BMW, you can try the following:

1. Replace the faulty Secondary Upstream Manifold Air Pressure Sensor
2. Repair any damaged wiring or connectors in the sensor circuit
3. Address any intake manifold leaks
4. If necessary, reprogram or replace the engine control module

How to erase DTC P1241 on BMW

To erase DTC P1241 on a BMW, you can clear the fault code using a diagnostic scanner. After fixing the underlying issue that caused the code, clearing it will reset the Check Engine Light and ensure that the code does not reappear.

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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