P20D5

Symptoms

• Increased urea/reagent consumption
• Check engine light comes on
• Reduced efficiency of the exhaust gas cleaning system
• The engine may go into emergency mode
• Increased emissions

Causes

• Mechanical jamming of the injector
• Nozzle contamination
• Problems with the electrical control circuit
• Engine control unit malfunction
• Damage to the wiring harness to the injector

How to Fix

1. Check the condition of the fuel injector of the exhaust gas cleaning system
2. Clean or replace a stuck injector
3. Check the injector control circuit
4. Check connections and wiring harness
5. If necessary, replace the control unit

Related codes

Error P20D5 by Vehicle Brand