P2403 – BMW DTC

BMW DTC P2403 – EVAP System Leak Detection Pump Sense Circuit/Open

DTC P2403 meaning on BMW

DTC P2403 on a BMW indicates a fault with the EVAP (Evaporative Emission Control) system Leak Detection Pump Sense Circuit. This fault code specifically points to an open circuit in the sensor circuit of the EVAP system’s leak detection pump.

BMW DTC P2403 symptoms

Symptoms of DTC P2403 on a BMW may include:

• Check Engine Light illuminated on the dashboard
• Decreased fuel efficiency
• Strong fuel odor near the vehicle

BMW DTC P2403 causes

Common causes of DTC P2403 on a BMW include:

• Faulty EVAP system Leak Detection Pump
• Open or short circuit in the wiring of the sensor circuit
• Corrosion or poor connections in the electrical system

BMW DTC P2403 seriousness

While DTC P2403 may not cause immediate drivability issues, it is important to address this fault code promptly. Ignoring this fault can lead to increased emissions, potential fuel leaks, and may cause the vehicle to fail emissions tests.

How to diagnose DTC P2403 on BMW

To diagnose DTC P2403 on a BMW, a mechanic would typically perform the following steps:

1. Use a diagnostic scanner to retrieve the fault code and freeze frame data
2. Inspect the EVAP system components for any visible damage or leaks
3. Check the wiring and connectors in the Leak Detection Pump Sense Circuit for continuity and proper connections
4. Perform a smoke test to detect any leaks in the EVAP system

How to fix DTC P2403 on BMW

To fix DTC P2403 on a BMW, the following steps may be taken:

1. Replace the faulty EVAP system Leak Detection Pump
2. Repair any open or short circuits in the sensor circuit wiring
3. Clean or replace corroded connectors in the electrical system
4. Clear the fault code and perform a test drive to ensure the issue is resolved

How to erase DTC P2403 on BMW

To erase DTC P2403 on a BMW, follow these steps:

1. Use a diagnostic scanner to clear the fault code from the vehicle’s memory
2. After clearing the code, perform a test drive to ensure 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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