Code result
P25D6
Exhaust Heat Exchanger Exhaust Bypass Valve A Position Sensor Stop Performance
Moderate severity
What it means
During self-calibration of the exhaust heat exchanger bypass valve A, the position sensor never reached the expected mechanical stop. The controller cannot zero the position reference, so commanded openings will be inaccurate.
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
Soot or carbon deposits prevent valve from reaching the stop
highOne of the most commonly reported causes for this code — check this first.
Worn linkage between actuator and valve flap
mediumA plausible cause — test and verify before replacing parts.
Position sensor not aligned with valve shaft
mediumA plausible cause — test and verify before replacing parts.
Related help
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