OBD-II code · Powertrain (generic)
P004E Turbocharger/Supercharger Boost Control A Circuit Intermittent/Erratic
Intermittent dropouts or noise on boost control A circuit. Loose connector, partial wiring break, or solenoid degrading.
Is it safe to drive with P004E?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyConnector loose or corroded
- PossibleWiring chafed inside loom
- Less likelyConnector with intermittent contact under vibration
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Boost Control Solenoid, Connector
Related codes
- P004FTurbocharger/Supercharger Boost Control B Circuit Intermittent/Erratic
- P004BTurbocharger/Supercharger Boost Control B Circuit Range/Performance
- P004CTurbocharger/Supercharger Boost Control B Circuit Low
- P004DTurbocharger/Supercharger Boost Control B Circuit High
- P0050HO2S Heater Control Circuit (Bank 2 Sensor 1)
- P0051HO2S Heater Control Circuit Low (Bank 2 Sensor 1)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.