Code result
P02CB
Turbocharger/Supercharger B Underboost Condition
Moderate severity
What it means
Boost pressure on the secondary turbocharger/supercharger (B) is below the lower threshold. Wastegate stuck open, charge-air leak, or VGT vanes stuck open.
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
Wastegate stuck open
highOne of the most commonly reported causes for this code — check this first.
Charge-air pipe leak
mediumA plausible cause — test and verify before replacing parts.
Related help
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