U019D – BMW DTC

BMW DTC U019D – Lost Communication with Direct Ozone Reduction Catalyst Temperature Sensor

DTC U019D meaning on BMW

DTC U019D on a BMW indicates a communication error with the Direct Ozone Reduction Catalyst Temperature Sensor. This fault code is specific to the communication system between the engine control module (ECM) and the temperature sensor located in the direct ozone reduction catalyst.

BMW DTC U019D symptoms

Symptoms of DTC U019D on a BMW may include:

• Check Engine Light (MIL) illuminated
• Reduced engine performance
• Possible decrease in fuel efficiency

BMW DTC U019D causes

Common causes of DTC U019D on a BMW include:

• Wiring or connector issues in the communication circuit
• Defective Direct Ozone Reduction Catalyst Temperature Sensor
• Faulty engine control module (ECM)

BMW DTC U019D seriousness

The seriousness of DTC U019D on a BMW depends on the underlying cause. While the vehicle may still be operable with this fault, it is important to address the issue promptly to prevent potential damage to the catalytic converter or other components.

How to diagnose DTC U019D on BMW

To diagnose DTC U019D on a BMW, a mechanic would typically perform the following steps:

1. Use a diagnostic scanner to retrieve the fault code and related data
2. Inspect the wiring and connectors in the communication circuit
3. Test the Direct Ozone Reduction Catalyst Temperature Sensor for proper operation
4. Check the engine control module (ECM) for any faults

How to fix DTC U019D on BMW

To fix DTC U019D on a BMW, the following steps may be taken:

1. Repair or replace any damaged wiring or connectors in the communication circuit
2. Replace the Direct Ozone Reduction Catalyst Temperature Sensor if found to be faulty
3. If the ECM is determined to be the issue, it may need to be reprogrammed or replaced

How to erase DTC U019D on BMW

To erase DTC U019D on a BMW, the fault code can be cleared using a diagnostic scanner. After the necessary repairs have been made, the code can be reset, and the Check Engine Light should turn off. It is important to ensure that the underlying issue causing the fault code has been resolved 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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