P20CA

Reductant Injection Air Pressure Leakage

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
Unusual odors from the exhaust system
SCR error messages on the instrument panel

Causes

Cracks or damage in the reagent injection system tubes
Leaky connections in the SCR system
Faulty reagent pump
Damaged O-rings
Clogged or dirty reagent injection nozzle

How to Fix

Visual inspection of the reagent injection system for leaks
Checking the tightness of all connections
Testing the operation of the reagent pump
Replacing damaged tubes or seals
Cleaning or replacing the reagent injection nozzle

Related codes

P20EE P20E9 P20E8