P04A2

Exhaust Pressure Control Valve B High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Reduced engine power
Increased fuel consumption
Unstable engine operation at idle
Check Engine Light Illuminates

Causes

Exhaust gas pressure control valve B malfunction
Open or short circuit in wiring harness
Valve connection problems
ECU malfunction

How to Fix

Check the condition of the exhaust gas pressure control valve B
Check the wiring harness for damage
Check connections and contacts
Replace valve or wiring harness if necessary
Reset the error and check if it returns

Related codes

P04A1 P04A3 P0401