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TuningBot DTC Database · v4.37.15

P004D Turbocharger/Supercharger Boost Control "B" Circuit High

Generic (OBD-II) interpretation in the TuningBot DTC database.

P · PowertrainEngineOBD2

What P004D means

P004D
Turbocharger/Supercharger Boost Control "B" Circuit High Generic · engine Data confidence 85%

The control module detected that the signal in the Turbocharger/Supercharger Boost Control "B" circuit stayed above the expected operating range.

Symptoms

  • Possible reduced power or limp mode
  • MIL illuminated
  • Possible abnormal turbocharger noise

Possible causes

  • Turbocharger actuator or position sensor fault
  • Sticking variable geometry mechanism
  • Charge-air or vacuum leak
  • Wiring or connector fault

Recommended checks

  • Compare specified vs actual boost with live data
  • Check actuator movement over the full range
  • Check hoses and vacuum lines
  • Inspect wiring and connectors

Related and nearby codes

P00 range
P0000P0001P0002P0003P0004P0005P0006P0007P0008P0009P000AP000BP000CP000DP000EP000FP0010P0011

How to read P004D

P

Powertrain: engine, transmission and driveline systems.

0

Generic SAE-standard code: same meaning on every make.

04D

Specific fault index within the subsystem.

Frequently asked questions about P004D

What does P004D mean?

Turbocharger/Supercharger Boost Control "B" Circuit High. The control module detected that the signal in the Turbocharger/Supercharger Boost Control "B" circuit stayed above the expected operating range.

Is P004D generic or manufacturer-specific?

P004D is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P004D at file level?

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.

Other file services

Stage 1/2/3 TuningDPF RemovalEGR RemovalAdBlue / SCR RemovalDTC RemovalIMMO OFFSpeed Limiter (Vmax)

Understand the system behind this code: Diagnostic Strategy and DTC Logic

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