BMW DTC P20E7 – Reductant Injection Air Pressure Too High
DTC P20E7 meaning on BMW
The DTC P20E7 error code on a BMW indicates that the reductant injection air pressure is too high. This code is specific to the reductant injection system, which is responsible for reducing harmful emissions in the exhaust gases.
BMW DTC P20E7 symptoms
Symptoms of the DTC P20E7 code on a BMW may include:
- Check Engine Light (CEL) illuminated
- Reduced engine performance
- Increased fuel consumption
- Smoke or unusual exhaust emissions
BMW DTC P20E7 causes
The DTC P20E7 code on a BMW can be triggered by various factors, including:
- Faulty reductant injection air pressure sensor
- Clogged or restricted reductant injection air pressure lines
- Issues with the reductant injection system pump
- Electrical faults in the system
BMW DTC P20E7 seriousness
Ignoring the DTC P20E7 code on a BMW can lead to increased emissions, reduced fuel efficiency, and potential damage to the engine and emission control components. It is important to address this issue promptly to maintain the vehicle’s performance and comply with emission regulations.
How to diagnose DTC P20E7 on BMW
To diagnose the DTC P20E7 code on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the error code and related data
- Inspect the reductant injection air pressure sensor and related components for damage or corrosion
- Check the reductant injection air pressure lines for blockages or leaks
- Test the reductant injection system pump for proper operation
- Verify the electrical connections and wiring in the system
How to fix DTC P20E7 on BMW
To fix the DTC P20E7 code on a BMW, the following steps may be taken:
- Replace the faulty reductant injection air pressure sensor
- Clean or replace clogged reductant injection air pressure lines
- Repair or replace the reductant injection system pump if necessary
- Address any electrical faults in the system
- Clear the error code and reset the Check Engine Light
How to erase DTC P20E7 on BMW
To erase the DTC P20E7 code on a BMW, a diagnostic scanner can be used to clear the error code from the vehicle’s computer. After addressing the underlying issue causing the code, the Check Engine Light can be reset, and the code should no longer reappear if the problem has been successfully resolved.
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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