P202C – BMW DTC

BMW DTC P202C – Reductant Tank Heater Control Circuit High

DTC P202C meaning on BMW

DTC P202C on a BMW indicates a fault with the reductant tank heater control circuit being detected as high. The reductant tank heater is responsible for maintaining the temperature of the diesel exhaust fluid (DEF) to prevent freezing in cold temperatures. When the control circuit is deemed high, it means that the voltage in the circuit is above the specified range, triggering the diagnostic trouble code.

BMW DTC P202C symptoms

Symptoms of DTC P202C on a BMW may include:

• Check Engine Light (MIL) illuminated
• Reduced engine performance
• Possible DEF freezing in cold weather

BMW DTC P202C causes

Common causes of DTC P202C on a BMW include:

• Faulty reductant tank heater
• Short circuit in the reductant tank heater control circuit
• Open circuit in the reductant tank heater control circuit
• Defective reductant tank heater control module

BMW DTC P202C seriousness

The seriousness of DTC P202C on a BMW lies in the potential for DEF freezing in cold temperatures, which can lead to emission control system malfunctions and reduced engine performance. It is important to address this issue promptly to ensure proper operation of the DEF system.

How to diagnose DTC P202C on BMW

To diagnose DTC P202C on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer.
2. Inspect the reductant tank heater and its control circuit for any visible damage or signs of malfunction.
3. Check the voltage and resistance in the reductant tank heater control circuit using a multimeter.
4. Test the reductant tank heater control module for proper operation.

How to fix DTC P202C on BMW

To fix DTC P202C on a BMW, you can try the following solutions:

1. Replace the faulty reductant tank heater if it is found to be defective.
2. Repair any short circuits or open circuits in the reductant tank heater control circuit.
3. Replace the reductant tank heater control module if necessary.
4. Clear the fault codes using a diagnostic scanner after the repairs have been completed.

How to erase DTC P202C on BMW

To erase DTC P202C on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the vehicle’s computer. After addressing the underlying issue causing the fault code and making the necessary repairs, you can reset the system by clearing the DTC P202C code.