U059E – BMW DTC

BMW DTC U059E – Invalid Data Received From NOx Sensor ‘A’

DTC U059E meaning on BMW

The DTC U059E code on a BMW indicates that the Engine Control Module (ECM) has detected invalid data being received from the NOx (Nitrogen Oxide) sensor ‘A’. This sensor is responsible for monitoring the levels of nitrogen oxide in the exhaust gases to ensure compliance with emissions regulations.

BMW DTC U059E symptoms

Symptoms of the DTC U059E code on a BMW may include:

• Check Engine Light (MIL) illuminated
• Reduced engine performance
• Increased fuel consumption
• Possible emission of higher levels of nitrogen oxide

BMW DTC U059E causes

Common causes of the DTC U059E code on a BMW include:

• Faulty NOx sensor ‘A’
• Wiring or connector issues in the sensor circuit
• ECM software or hardware problems
• Exhaust system leaks or damage

BMW DTC U059E seriousness

The DTC U059E code should not be ignored as it can lead to increased emissions, reduced engine efficiency, and potential damage to the catalytic converter. It is important to address this issue promptly to ensure proper vehicle operation and compliance with emissions standards.

How to diagnose DTC U059E on BMW

To diagnose the DTC U059E code on a BMW, a mechanic may perform the following steps:

1. Use a diagnostic scanner to retrieve the fault codes stored in the ECM
2. Inspect the NOx sensor ‘A’ and its wiring for any visible damage or corrosion
3. Check the sensor’s output using a multimeter to verify its functionality
4. Perform a visual inspection of the exhaust system for leaks or damage
5. Check for any software updates or recalls related to the ECM

How to fix DTC U059E on BMW

To fix the DTC U059E code on a BMW, the following steps may be taken:

1. Replace the faulty NOx sensor ‘A’ if it is determined to be the cause of the issue
2. Repair any damaged wiring or connectors in the sensor circuit
3. Clear the fault codes using a diagnostic scanner after the repairs have been completed
4. Perform a test drive to ensure the issue has been resolved

How to erase DTC U059E on BMW

To erase the DTC U059E code on a BMW, follow these steps:

1. Connect a diagnostic scanner to the vehicle’s OBD-II port
2. Select the option to clear fault codes from the ECM
3. Follow the on-screen prompts to confirm the deletion of the DTC U059E code
4. Once the code has been cleared, disconnect the scanner and start the vehicle to ensure the code does not return

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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