Code result
P2C23
Exhaust Heat Exchanger Exhaust Bypass Valve A Position Sensor Performance
Moderate severity
What it means
The position sensor for exhaust heat exchanger bypass valve A reports a performance condition. Heat recovery routing cannot be verified reliably.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Sensor offset drifted
highOne of the most commonly reported causes for this code — check this first.
Linkage between sensor and valve worn
mediumA plausible cause — test and verify before replacing parts.
Sensor element aged beyond calibration window
lowLess common, but worth ruling out after the more likely causes.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P2C23 freeNo credit card required