P0419

AIR System Control B Circuit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Reduced engine efficiency
Increased emissions of harmful substances

Causes

Open or short circuit in wiring harness
Solenoid valve malfunction
Problems with the engine control unit (ECU)
Contamination or blockage of the secondary air supply system

How to Fix

Check the wiring harness for damage
Check the operation of the solenoid valve
Clean the secondary air system
Check engine control unit (ECU)

Related codes

P0410 P0411 P0412