P04A3

Exhaust Pressure Control Valve B Intermittent

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Unstable engine operation
Increased fuel consumption
Check Engine light comes on
Reduced engine power

Causes

Valve wiring problems
Malfunction of the solenoid valve (solenoid)
Mechanical damage to the valve
Valve contamination
Problems with the engine control unit (ECU)

How to Fix

Check wiring harness for damage
Check resistance and voltage at valve
Clean or replace valve
Check the operation of the engine control unit

Related codes

P04A0 P04A1 P04A2