Code result
P2B98
Exhaust Pressure Control Valve A Supply Low
High severity
What it means
The supply voltage to the exhaust pressure control valve A actuator is below the expected window. Fuse blown, supply wire shorted, or upstream regulator fault.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Supply fuse blown
highOne of the most commonly reported causes for this code — check this first.
Supply wire shorted to ground
mediumA plausible cause — test and verify before replacing parts.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P2B98 freeNo credit card required