BMW DTC P0240 – Turbocharger/Supercharger Boost Sensor ‘B’ Circuit Range/Performance
DTC P0240 meaning on BMW
The Diagnostic Trouble Code (DTC) P0240 for BMW indicates an issue with the Turbocharger/Supercharger Boost Sensor ‘B’ Circuit. This code is triggered when the Engine Control Module (ECM) detects that the signal from the boost sensor is outside the expected range or performance parameters.
BMW DTC P0240 symptoms
Symptoms of DTC P0240 on a BMW may include:
- Reduced engine power
- Decreased fuel efficiency
- Check Engine Light (CEL) illuminated on the dashboard
- Loss of turbocharger or supercharger performance
BMW DTC P0240 causes
Common causes of DTC P0240 on a BMW include:
- Defective boost sensor ‘B’
- Wiring or connector issues in the boost sensor circuit
- Boost sensor calibration out of range
- Problems with the turbocharger or supercharger system
BMW DTC P0240 seriousness
DTC P0240 should not be ignored as it can lead to reduced engine performance and potential long-term damage to the turbocharger or supercharger system. It is recommended to address this issue promptly to prevent further complications.
How to diagnose DTC P0240 on BMW
To diagnose DTC P0240 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the ECM.
- Inspect the boost sensor ‘B’ and its wiring for any visible damage or corrosion.
- Check the boost sensor’s output signal using a multimeter to ensure it is within the specified range.
- Perform a visual inspection of the turbocharger or supercharger system for any leaks or malfunctions.
How to fix DTC P0240 on BMW
To fix DTC P0240 on a BMW, you can try the following solutions:
- Replace the boost sensor ‘B’ if it is found to be faulty.
- Repair any damaged wiring or connectors in the boost sensor circuit.
- Calibrate the boost sensor according to manufacturer specifications.
- Address any issues with the turbocharger or supercharger system that may be causing the problem.
How to erase DTC P0240 on BMW
To erase DTC P0240 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the ECM. Once the codes are cleared, you can drive the vehicle and monitor for any recurrence of the issue. If the problem persists, further diagnosis and repairs may be necessary.
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
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.