P2598
Turbocharger Boost Control Position Sensor A Performance - Stuck Low
What it means
Position sensor A reports a value stuck near the low end of its travel even when the actuator is commanded to move. Either the actuator is mechanically stuck closed (wastegate jammed shut, VGT vanes seized at minimum opening) or the sensor itself is pegged low. Boost is uncontrolled — overboost on diesels with VGT, underboost on wastegate-stuck systems.
Is it safe to drive?
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
Actuator mechanically stuck near low end
highOne of the most commonly reported causes for this code — check this first.
Sensor pegged low
mediumA plausible cause — test and verify before replacing parts.
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