P23A8

Exhaust Heat Exchanger Exhaust Bypass Valve B Position Sensor Stop Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Reduced engine efficiency
Deterioration of vehicle dynamics
Increased fuel consumption
Possible problems with the heat recovery system

Causes

Valve position sensor malfunction
Mechanical failure of the bypass valve
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Problems with the engine control unit

How to Fix

Check the condition and operation of the bypass valve
Test valve position sensor
Check the integrity of the circuit and connectors
If necessary, replace the position sensor
Clean or replace bypass valve if necessary

Related codes

P23A7 P23A9 P23AA