P20E7

Symptoms

• Check Engine light comes on
• Reduced engine power
• Increased fuel consumption
• Unpleasant exhaust smell
• SCR System Error Message

Causes

• Clogged air channels of the reagent injection system
• Air pressure control valve malfunction
• Damage or leakage in air lines
• Air pressure sensor malfunction
• Problems with the engine control unit (ECU)

How to Fix

1. Check air lines for leaks and damage
2. Clear or replace clogged air passages
3. Check the operation of the air pressure control valve
4. Check the air pressure sensor and its connection
5. Scan the system for other errors

Related codes

Error P20E7 by Vehicle Brand