BMW DTC P245B – EGR Cooler Bypass Control Circuit Range/Performance (Bank 1)
DTC P245B meaning on BMW
DTC P245B on a BMW indicates an issue with the EGR (Exhaust Gas Recirculation) Cooler Bypass Control Circuit in Bank 1. This fault code is related to the performance or range of the circuit, signaling that the EGR cooler bypass control system is not functioning within the expected parameters.
BMW DTC P245B symptoms
Symptoms of DTC P245B on a BMW may include:
- Check Engine Light illuminated
- Reduced engine performance
- Increased fuel consumption
- Engine stalling or rough idling
BMW DTC P245B causes
Common causes of DTC P245B on a BMW include:
- Faulty EGR cooler bypass control valve
- Wiring or connector issues in the EGR cooler bypass control circuit
- Carbon buildup in the EGR system
- Software or calibration issues
BMW DTC P245B seriousness
DTC P245B should not be ignored as it can lead to reduced engine efficiency and potential drivability issues. Continuing to drive with this fault unresolved may cause further damage to the engine components and increase emissions.
How to diagnose DTC P245B on BMW
To diagnose DTC P245B on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data
- Inspect the EGR cooler bypass control valve and related components for any visible damage or corrosion
- Check the wiring and connectors in the EGR cooler bypass control circuit for continuity and proper connection
- Perform a smoke test to check for leaks in the EGR system
How to fix DTC P245B on BMW
To fix DTC P245B on a BMW, the following steps may be taken:
- Replace the faulty EGR cooler bypass control valve
- Repair or replace any damaged wiring or connectors in the EGR cooler bypass control circuit
- Clean out any carbon buildup in the EGR system
- Update the software or calibration of the engine control module if necessary
How to erase DTC P245B on BMW
After the issue causing DTC P245B on a BMW has been resolved, the fault code can be cleared using a diagnostic scanner. This will reset the Check Engine Light and erase the code from the vehicle’s memory. It is important to ensure that the underlying problem has been fixed before clearing the fault code.
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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