P240B – BMW DTC

BMW DTC P240B – EVAP System Leak Detection Pump Heater Control Circuit Low

DTC P240B meaning on BMW

The Diagnostic Trouble Code (DTC) P240B for BMW refers to a fault in the EVAP (Evaporative Emission Control) system’s Leak Detection Pump Heater Control Circuit. This code indicates that there is a low voltage condition detected in the circuit responsible for controlling the heater in the leak detection pump.

BMW DTC P240B symptoms

Symptoms of the DTC P240B on a BMW may include:

• Check Engine Light illuminated on the dashboard
• Decreased fuel efficiency
• Issues with passing emissions tests

BMW DTC P240B causes

Common causes of the DTC P240B on a BMW include:

• Faulty Leak Detection Pump
• Defective Heater Control Circuit
• Wiring or connector issues in the circuit

BMW DTC P240B seriousness

While the DTC P240B may not cause immediate drivability issues, it is important to address this fault as it can lead to increased emissions and potential long-term damage to the vehicle’s emission control system.

How to diagnose DTC P240B on BMW

To diagnose the DTC P240B on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault code and freeze frame data
2. Inspect the wiring and connectors in the Leak Detection Pump Heater Control Circuit
3. Test the Leak Detection Pump and its heater for proper operation

How to fix DTC P240B on BMW

To fix the DTC P240B on a BMW, you may need to:

1. Replace the faulty Leak Detection Pump
2. Repair or replace any damaged wiring or connectors in the circuit
3. Address any issues with the Heater Control Circuit

How to erase DTC P240B on BMW

To erase the DTC P240B on a BMW, you can:

1. Use a diagnostic scanner to clear the fault code
2. After fixing the underlying issue, ensure that the Check Engine Light 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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