BMW DTC P0259 – Injection Pump Fuel Metering Control ‘B’ High (Cam/Rotor/Injector)
DTC P0259 meaning on BMW
DTC P0259 on a BMW indicates an issue with the Injection Pump Fuel Metering Control ‘B’ High (Cam/Rotor/Injector). This fault code is triggered when the Engine Control Module (ECM) detects that the fuel metering control circuit ‘B’ is operating at a higher than specified voltage level.
BMW DTC P0259 symptoms
Symptoms of DTC P0259 on a BMW may include:
- Check Engine Light (CEL) illuminated
- Engine running rough or misfiring
- Reduced engine performance
- Increased fuel consumption
BMW DTC P0259 causes
Common causes of DTC P0259 on a BMW include:
- Faulty fuel injector
- Wiring or connector issues in the fuel metering control circuit
- Defective Injection Pump
- ECM software issues
BMW DTC P0259 seriousness
DTC P0259 should not be ignored as it can lead to poor engine performance, reduced fuel efficiency, and potential engine damage if left unresolved. It is recommended to address this issue promptly to prevent further complications.
How to diagnose DTC P0259 on BMW
To diagnose DTC P0259 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the ECM
- Inspect the fuel injector ‘B’ and its wiring for any visible damage or corrosion
- Check the fuel metering control circuit for proper voltage levels
- Perform a fuel system pressure test to ensure proper fuel delivery
How to fix DTC P0259 on BMW
To fix DTC P0259 on a BMW, the following steps may be taken:
- Replace any faulty fuel injectors or repair wiring/connectors in the fuel metering control circuit
- If the Injection Pump is defective, it may need to be replaced
- Update the ECM software to the latest version
- Clear the fault codes and perform a test drive to ensure the issue has been resolved
How to erase DTC P0259 on BMW
To erase DTC P0259 on a BMW, follow these steps:
- Use a diagnostic scanner to access the ECM and clear the fault codes
- After clearing the codes, start the engine and ensure the Check Engine Light is no longer illuminated
- If the light reappears, further diagnosis may be required to address any underlying issues
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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