P209D

Symptoms

• Check Engine light comes on
• Reduced engine power
• Increased fuel consumption
• Unpleasant exhaust smell
• Errors in the operation of the SCR system

Causes

• Air pressure sensor B fault
• Open or short circuit in the sensor circuit
• Poor contact in the sensor connector
• Wiring harness damage
• Problems with the engine ECU

How to Fix

1. Check the integrity of the sensor circuit
2. Inspect the connectors and contacts of the sensor
3. Check the functionality of air pressure sensor B
4. Replace sensor if necessary
5. Check and update the ECU firmware if necessary

Related codes

Error P209D by Vehicle Brand