P208E

Symptoms

• Increased NOx emissions
• Check Engine light comes on
• Reduced engine power
• Possible transition to emergency mode
• SCR system error message on dashboard

Causes

• Mechanical valve jamming
• Open or short circuit in control circuit
• Solenoid valve malfunction
• Problems with the engine control unit (ECU)
• Contamination or crystallization of the reagent in the valve

How to Fix

1. Check the valve control circuit for opens and shorts
2. Check valve resistance and operation
3. Clean or replace the reagent injection valve
4. Check and, if necessary, update ECU software
5. Flush the SCR system to remove crystallized reagent

Related codes

Error P208E by Vehicle Brand