P004F OBD-II: Turbocharger/Supercharger Boost Control "B" Circuit
P004F Severity
Will P004F go away on its own?
Once the vehicle's onboard system no longer detects the issue, most codes will disappear on their own. If your vehicle still has this code, however, it should be properly diagnosed to avoid a more serious problem.
For a proper diagnosis, RepairPal Certified shops have the equipment, tools, and expertise.
Moderate severity codes might not threaten the vehicle's safety or functionality immediately, but you should still get it diagnosed within a reasonable time frame to keep your car running well.
What causes OBD-II fault code P004F?
The engine control module (PCM) uses a Boost Control Solenoid to control the turbocharger and provide the requested amount of boost. When the PCM detects an incorrect signal from the Boost Control Solenoid, it will set code P004F.
OBD II Fault Code
- OBD II P004F
OBD-II Code Powertrain Control Module (PCM) failure is defined as a Turbocharger/Supercharger Boost Control "B" Circuit
The engine control module (PCM) uses a Boost Control Solenoid to control the turbocharger and provide the requested amount of boost. When the PCM detects an incorrect signal from the Boost Control Solenoid, it will set code P004F.
Powertrain Control Module (PCM) failure Symptoms
- Engine may enter limp home mode (reduced performance)
- Lack of boost from the turbo/supercharger
Common Problems That Trigger the P004F Code
- Boost control solenoid failure
- Powertrain Control Module (PCM) failure
- Wiring issue
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