P23A6

Exhaust Heat Exchanger Exhaust Bypass Valve B Stuck Open

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$50–133 (est.)

Symptoms

Reduced engine power
Increased fuel consumption
Cold start problems
Check Engine Indication
Noises from the exhaust system

Causes

Valve jamming due to carbon deposits
Valve mechanism corrosion
Valve control circuit open
Solenoid valve malfunction
Problems with the vacuum drive (if any)

How to Fix

Check valve movement manually
Check valve control circuit
Test valve actuator
Clean or replace a stuck valve
Check vacuum system operation (if applicable)

Related codes

P23A5 P23A7 P23A8