BMW DTC P202E – Reductant Injection Valve Circuit Range/Performance (Bank 1 Unit 1)
DTC P202E meaning on BMW
DTC P202E for BMW indicates an issue with the Reductant Injection Valve Circuit Range/Performance on Bank 1 Unit 1. This fault code is related 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 P202E symptoms
Symptoms of DTC P202E on a BMW may include:
- Check Engine Light (MIL) illuminated
- Reduced engine performance
- Increased fuel consumption
- Failed emissions test
BMW DTC P202E causes
Common causes of DTC P202E on a BMW include:
- Faulty reductant injection valve
- Wiring or connector issues in the reductant injection valve circuit
- Defective reductant control module
- Low AdBlue fluid level
BMW DTC P202E seriousness
DTC P202E should not be ignored as it can lead to increased emissions and potential regulatory compliance issues. Additionally, prolonged driving with this fault code may cause damage to the catalytic converter and other emission control components.
How to diagnose DTC P202E on BMW
To diagnose DTC P202E 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 reductant injection valve and related wiring for any visible damage
- Test the reductant injection valve circuit for proper voltage and continuity
- Check the AdBlue fluid level and quality
How to fix DTC P202E on BMW
To fix DTC P202E on a BMW, the following steps may be taken:
- Replace the faulty reductant injection valve
- Repair any damaged wiring or connectors in the circuit
- Replace the reductant control module if necessary
- Refill the AdBlue fluid to the appropriate level
How to erase DTC P202E on BMW
After fixing the underlying issue causing DTC P202E on a BMW, the fault code can be erased using a diagnostic scanner. This will clear the code from the vehicle’s memory and turn off the Check Engine Light. It is important to ensure that the repair has been successful 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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