What are the common causes of U043B?

Damaged or shorted wiring at the Front Distance Range Sensor - Left. Corrupted or outdated software in the Front Distance Range Sensor - Left. A poor ground shared with the Front Distance Range Sensor - Left. A failed Front Distance Range Sensor - Left.

Read the stored codes on a scan tool. Check Front Distance Range Sensor - Left data on live data. Inspect the Front Distance Range Sensor - Left connector for corrosion or backed out pins. Replace the Front Distance Range Sensor - Left if the wiring and voltage tests pass. Clear the code and retest.

U043B

Invalid Data Received From Front Distance Range Sensor - Left

System: Network communication (U code)
Lamp: Check Engine Light
Category: Network Communications

What it means

U043B means Invalid Data Received From Front Distance Range Sensor - Left.

Where it lives

For U043B, the description names the sensor as the part involved.

Check these first

Damaged or shorted wiring at the Front Distance Range Sensor - Left
Corrupted or outdated software in the Front Distance Range Sensor - Left
A poor ground shared with the Front Distance Range Sensor - Left
A failed Front Distance Range Sensor - Left

What to do next

Read the stored codes on a scan tool
Check Front Distance Range Sensor - Left data on live data
Inspect the Front Distance Range Sensor - Left connector for corrosion or backed out pins
Replace the Front Distance Range Sensor - Left if the wiring and voltage tests pass
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.