BMW DTC P202A – Reductant Tank Heater Control Circuit/Open
DTC P202A meaning on BMW
The Diagnostic Trouble Code (DTC) P202A for BMW indicates an issue with the Reductant Tank Heater Control Circuit/Open. This code is specific to the reductant system, which is responsible for reducing harmful emissions in the exhaust gases of the vehicle.
BMW DTC P202A symptoms
Symptoms of the DTC P202A on a BMW may include:
- Check Engine Light illuminated on the dashboard
- Reduced engine performance
- Possible decrease in fuel efficiency
BMW DTC P202A causes
Common causes of the DTC P202A on a BMW include:
- Faulty reductant tank heater
- Open or short circuit in the reductant tank heater control circuit
- Corrosion or damage to wiring related to the reductant system
BMW DTC P202A seriousness
The DTC P202A should not be ignored as it can lead to increased emissions and potential damage to the vehicle’s emission control system. It is important to address this issue promptly to ensure the vehicle meets emission standards and operates efficiently.
How to diagnose DTC P202A on BMW
To diagnose the DTC P202A on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and related data
- Inspect the reductant tank heater and associated wiring for any visible damage
- Test the reductant tank heater control circuit for continuity and proper voltage
How to fix DTC P202A on BMW
To fix the DTC P202A on a BMW, the following steps may be taken:
- Replace the faulty reductant tank heater if necessary
- Repair any open or short circuits in the reductant tank heater control circuit
- Repair or replace any damaged wiring related to the reductant system
How to erase DTC P202A on BMW
To erase the DTC P202A on a BMW, a mechanic can use a diagnostic scanner to clear the fault code from the vehicle’s computer system. Once the issue has been addressed and fixed, the code can be cleared to reset the Check Engine Light.
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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