P206B

Symptoms

• Check Engine light comes on
• Reduced engine power
• Increased fuel consumption
• Problems starting the engine
• Unpleasant exhaust smell

Causes

• Reagent quality sensor malfunction
• Damaged wiring or poor contact
• Poor quality or freezing of the reagent
• Problems with the engine control unit
• Sensor contamination

How to Fix

1. Check the quality and level of AdBlue reagent
2. Inspect the sensor wiring and connectors
3. Check the functionality of the reagent quality sensor
4. Clean or replace sensor if necessary
5. Reset the error and take a test drive

Related codes

Error P206B by Vehicle Brand