Code result
P237F
Exhaust Heat Exchanger Bypass Valve A Control Performance
Moderate severity
What it means
Exhaust Heat Exchanger Bypass Valve A Control Performance: the component is electrically intact but its response does not match the command.
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
Flap stuck due to soot or carbon deposits
highOne of the most commonly reported causes for this code — check this first.
Actuator gearing worn or slipping
mediumA plausible cause — test and verify before replacing parts.
Position sensor offset against actual flap angle
lowLess common, but worth ruling out after the more likely causes.
Related help
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