OBD-II code · Powertrain (generic, extended)
P2B98 Exhaust Pressure Control Valve A Supply Low
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 with P2B98?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySupply fuse blown
- PossibleSupply wire shorted to ground
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- Parts involved
- Exhaust Pressure Control Valve A, Wiring Harness
Related codes
- P2B95Cold Start Injection Pulse Performance
- P2B96Injection Pulse Performance
- P2B97Exhaust Pressure Control Valve A Position Exceeded Learning Limit
- P2B99Exhaust Pressure Control Valve A Driver Current/Temperature Too High
- P2B9AReductant Quality Sensor Circuit Intermittent/Erratic
- P2B9BVehicle Conditions Incorrect for Particulate Matter Sensor Regeneration
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.