BMW DTC P20E6 – Reductant Injection Air Pressure Too Low
DTC P20E6 meaning on BMW
The Diagnostic Trouble Code (DTC) P20E6 for BMW indicates that the reductant injection air pressure is too low. This code is specific to the reductant injection system, which is responsible for reducing harmful emissions in the exhaust gases by injecting a urea-based solution (AdBlue) into the exhaust stream.
BMW DTC P20E6 symptoms
Symptoms of the DTC P20E6 on a BMW may include:
- Check Engine Light (MIL) illuminated
- Reduced engine performance
- Increased emissions
- Possible DEF (diesel exhaust fluid) warning message
BMW DTC P20E6 causes
Common causes of the DTC P20E6 on a BMW include:
- Low urea (AdBlue) fluid level
- Malfunctioning reductant injection system
- Defective reductant injector
- Issues with the reductant injection air pressure sensor
BMW DTC P20E6 seriousness
The DTC P20E6 should not be ignored as it can lead to increased emissions and potential compliance issues with emissions regulations. Additionally, prolonged driving with this fault may result in reduced engine performance and possible damage to the catalytic converter.
How to diagnose DTC P20E6 on BMW
To diagnose the DTC P20E6 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the urea (AdBlue) fluid level
- Check the reductant injection system components for any visible damage or leaks
- Test the reductant injection air pressure sensor
How to fix DTC P20E6 on BMW
Depending on the root cause of the DTC P20E6, the following steps may be taken to fix the issue:
- Refill the urea (AdBlue) fluid to the appropriate level
- Replace the defective reductant injector
- Repair or replace any damaged components in the reductant injection system
- Address any issues with the reductant injection air pressure sensor
How to erase DTC P20E6 on BMW
After fixing the underlying issue causing the DTC P20E6, the fault code can be cleared using a diagnostic scanner. This will reset the Check Engine Light and allow for monitoring of the system to ensure the fault does not reoccur.
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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