P143E – BMW DTC

BMW DTC P143E – Direct Ozone Reduction Catalyst Temperature Sensor Gradient Too Low

DTC P143E meaning on BMW

DTC P143E on a BMW indicates that the Direct Ozone Reduction Catalyst Temperature Sensor Gradient is too low. This means that the sensor is detecting a smaller than expected change in temperature across the catalyst, which can affect the efficiency of the emissions control system.

BMW DTC P143E symptoms

Symptoms of DTC P143E on a BMW may include:

• Check Engine Light illuminated
• Reduced engine performance
• Increased emissions

BMW DTC P143E causes

Common causes of DTC P143E on a BMW include:

• Faulty Direct Ozone Reduction Catalyst Temperature Sensor
• Wiring or connector issues
• Exhaust system leaks

BMW DTC P143E seriousness

DTC P143E should not be ignored as it can lead to increased emissions and potential damage to the catalytic converter. It is important to address this issue promptly to ensure proper vehicle operation and compliance with emissions regulations.

How to diagnose DTC P143E on BMW

To diagnose DTC P143E on a BMW, a mechanic may perform the following steps:

1. Use a diagnostic scanner to retrieve the fault code
2. Inspect the Direct Ozone Reduction Catalyst Temperature Sensor and its wiring for any visible damage
3. Check for exhaust leaks that may be affecting sensor readings

How to fix DTC P143E on BMW

To fix DTC P143E on a BMW, the following steps may be taken:

1. Replace the faulty Direct Ozone Reduction Catalyst Temperature Sensor
2. Repair any damaged wiring or connectors
3. Address any exhaust leaks in the system

How to erase DTC P143E on BMW

To erase DTC P143E 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 to turn off the Check Engine Light and ensure that the issue has been resolved.

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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