P23A5

Exhaust Heat Exchanger Exhaust Bypass Valve B Control Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Increased fuel consumption
Unstable engine operation at idle
Reduced engine power
Check Engine Light Illuminates
Increased level of harmful emissions

Causes

Solenoid valve B fault
Open or short circuit in control circuit
Mechanical clogged valve
Wiring Harness Problems
Malfunction of the engine control unit (ECU)

How to Fix

Check the condition of solenoid valve B
Check the integrity of the control circuit and wiring harness
Clean or replace clogged valve
Check the operation of the EGR system
If necessary, replace the faulty valve

Related codes

P23A4 P23A6 P23A7