P209F

Symptoms

• The Check Engine light comes on
• Reduced efficiency of the exhaust gas cleaning system
• Possible problems starting the engine in cold weather
• SCR System Error Message Appears
• Increased NOx emissions

Causes

• Reagent tank heating element malfunction
• Open or short circuit in the heating control circuit
• Poor contact in the heating circuit connectors
• Malfunction of the relay or heating control unit
• Low level or poor quality of reagent in the tank

How to Fix

1. Check the level and quality of the reagent in the tank
2. Diagnose the heating circuit for breaks and short circuits
3. Check the voltage on the heating element
4. Inspect the connectors and contacts of the control circuit
5. If necessary, replace the heating element or control unit

Related codes

Error P209F by Vehicle Brand