Hours: 07–23 daily
EN
Tune your file

TuningBot DTC Database · v4.37.14

U040D Invalid Data Received From Turbocharger/Supercharger Control Module A

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

U · NetworkEngineOBD2

What U040D means

U040D
Invalid Data Received From Turbocharger/Supercharger Control Module A Generic · engine Data confidence 65%

The control module registered the fault condition described as "Invalid Data Received From Turbocharger/Supercharger Control Module A".

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

U04 range
U0400U0401U0402U0403U0404U0405U0406U0407U0408U0409U040AU040BU040CU040EU040FU0410U0411U0412

How to read U040D

U

Network: communication between control units.

0

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

40D

Specific fault index within the subsystem.

Frequently asked questions about U040D

What does U040D mean?

Invalid Data Received From Turbocharger/Supercharger Control Module A. The control module registered the fault condition described as "Invalid Data Received From Turbocharger/Supercharger Control Module A".

Is U040D generic or manufacturer-specific?

U040D is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove U040D at file level?

Not guaranteed. Powertrain (P) codes can be reliably disabled in the ECU calibration, but body, chassis and network codes depend on the specific control unit and how the fault is implemented - some can be handled, some cannot. Ask for a quote and our engineers will check your file and tell you, free of charge, whether U040D is removable in your case.

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

ECU tuningDyno-tested results by model and engine See the results →

← Search the full DTC database