BMW DTC P20E5 – Exhaust Gas Temperature Sensor 1/2 Correlation (Bank 2)
DTC P20E5 meaning on BMW
The DTC P20E5 code on a BMW indicates a correlation issue between the exhaust gas temperature sensor 1 and sensor 2 on bank 2 of the engine. This means that the readings from these two sensors are not matching up as expected, which can lead to improper engine performance and emissions.
BMW DTC P20E5 symptoms
Symptoms of the DTC P20E5 code on a BMW may include:
- Check Engine Light (CEL) illuminated on the dashboard
- Reduced engine performance
- Increased fuel consumption
- Possible rough idling or misfiring
BMW DTC P20E5 causes
Common causes of the DTC P20E5 code on a BMW include:
- Faulty exhaust gas temperature sensors
- Wiring or connector issues related to the sensors
- Exhaust system leaks or damage
- Engine control module (ECM) software issues
BMW DTC P20E5 seriousness
The DTC P20E5 code should not be ignored as it can lead to poor engine performance, increased emissions, and potential damage to the catalytic converter. It is recommended to address this issue promptly to prevent further complications.
How to diagnose DTC P20E5 on BMW
To diagnose the DTC P20E5 code on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes and freeze frame data
- Inspect the exhaust gas temperature sensors and their wiring for any visible damage
- Check for exhaust leaks or other issues in the exhaust system
- Perform a sensor correlation test to determine the discrepancy between the two sensors
How to fix DTC P20E5 on BMW
To fix the DTC P20E5 code on a BMW, the following steps may be taken:
- Replace faulty exhaust gas temperature sensors
- Repair or replace damaged wiring or connectors related to the sensors
- Address any exhaust system leaks or damage
- Update the engine control module (ECM) software if necessary
How to erase DTC P20E5 on BMW
After the issue causing the DTC P20E5 code has been resolved, the code can be erased using a diagnostic scanner. This will clear the code from the ECM’s memory and turn off the Check Engine Light. It is important to ensure that the underlying problem has been fixed before clearing the 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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