BMW DTC P044B – EGR Sensor ‘C’ Circuit Range/Performance
DTC P044B meaning on BMW
The Diagnostic Trouble Code (DTC) P044B for BMW refers to the EGR (Exhaust Gas Recirculation) Sensor ‘C’ Circuit Range/Performance. This code indicates that there is an issue with the EGR sensor circuit, specifically sensor ‘C’, which is responsible for monitoring the EGR system’s performance.
BMW DTC P044B symptoms
Symptoms of the DTC P044B on a BMW may include:
- Check Engine Light (CEL) illuminated on the dashboard
- Decreased fuel efficiency
- Engine hesitation or rough idling
- Reduced engine performance
BMW DTC P044B causes
The DTC P044B on a BMW can be triggered by various factors, including:
- Malfunctioning EGR sensor ‘C’
- Wiring or connector issues in the EGR sensor circuit
- Carbon buildup in the EGR system
- Faulty EGR valve
BMW DTC P044B seriousness
While the DTC P044B may not cause immediate drivability issues, it is essential to address this code promptly to prevent potential damage to the engine and emissions system. Ignoring this code can lead to decreased fuel efficiency and increased emissions output.
How to diagnose DTC P044B on BMW
To diagnose the DTC P044B 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 sensor ‘C’ and its wiring for any visible damage or corrosion
- Test the EGR sensor using a multimeter to check for proper resistance values
- Check the EGR valve operation and clean any carbon buildup if necessary
How to fix DTC P044B on BMW
Fixing the DTC P044B on a BMW typically involves the following steps:
- Replace the faulty EGR sensor ‘C’ if it is determined to be the cause of the code
- Repair any damaged wiring or connectors in the EGR sensor circuit
- Clean the EGR system components to remove any carbon deposits
- If needed, replace the EGR valve to ensure proper operation
How to erase DTC P044B on BMW
After fixing the underlying issue causing the DTC P044B on a BMW, the code can be cleared using a diagnostic scanner. This process typically involves accessing the vehicle’s onboard computer system and selecting the option to clear the fault codes. Once cleared, the Check Engine Light should turn off, indicating that the code has been successfully erased.
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.