P02CB OBD-II: Turbocharger/Supercharger "B" Underboost Condition

OBD II Fault Code

• OBD II P02CB

OBD-II Code Decreased engine performance is defined as a Turbocharger/Supercharger "B" Underboost Condition

The engine control module (PCM) uses sensors to determine if the Turbocharger/Supercharger is providing the requested amount of boost. If the PCM determines that the requested amount of boost is not being provided, the PCM will set code P02CB.

Decreased engine performance Symptoms

• Decreased engine performance
• Increased fuel consumption
• Lack of boost from the turbo/supercharger

Common Problems That Trigger the P02CB Code

• Brake booster pressure sensor failure
• Exhaust leak
• Manifold Absolute Pressure (MAP) sensor failure
• Powertrain Control Module (PCM) failure
• Turbo/supercharger control solenoid failure
• Turbo/supercharger failure
• Wiring issue