01 The Hidden Reason Engines Struggle To Idle Smoothly Before … • 02 Valve Adjustment: The Essential Tune-up for a Healthy and H… • 03 How Your Braking System Works and How to Keep It Safe • 04 Why Your Check Engine Light Won't Go Off: A Diagnostic Guide • 05 Why Do They Ask for Your Old Car Battery? A Comprehensive G… • 06 How to Temporarily Fix a Car Water Pump Leak • 07 How Many More Kilometres Can You Drive After the Empty Tank… • 08 How Technology Has Changed The Automotive Industry "Engines" • 09 Why Do Car Engines Have a Redline and What Happens If You E… • 10 Electric and Hybrid Vehicle Buying Guide: Everything You Ne… •

DTC codes / P2Bxx · Hybrid propulsion / P2B99

P2B99Exhaust Pressure Control Valve A Driver Current/Temperature Too High

P2B99 indicates that the powertrain control module (PCM) has detected the driver circuit for exhaust pressure control valve A is drawing excessive current or that the driver's internal temperature has exceeded a safe limit. This usually points to a short circuit, a failing valve actuator, or a damaged driver inside the PCM, and the module may disable the valve to protect itself.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyIntermediate
AreaHybrid propulsion

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

Running on fumes Free guides aren't free to make. Top up the tank. Any amount, one time. Fuel the Garage