Turbo / BoostModerate ImpactDiesel & Petrol

P0238 — Diagnostic Trouble Code P0238

OBD-II diagnostic code P0238 relates to the turbo / boost system. This code is logged when the ECU detects a parameter outside its expected operating range.

7+

Affected Brands

12+

ECU Platforms

3

Related Services

4

Related DTCs

Symptoms

What the driver typically experiences when P0238 is stored

!Check Engine Light
iReduced boost pressure
iLoss of power
!!Possible limp mode

Why does P0238 appear after tuning?

This code may appear after ECU modifications when the affected system monitoring has not been fully recalibrated for the new operating parameters.

How proper calibration can address P0238

WEREMAP professional calibrations include comprehensive diagnostic management for all affected systems, preventing unnecessary fault codes while maintaining safe operation.

Related Tuning Services

Relevant services for the system behind P0238

Stage 1Stage 2DTC Off

Related Diagnostic Codes

Codes from the same diagnostic system as P0238

P0236Moderate Impact

Diagnostic Trouble Code P0236

P0237Moderate Impact

Diagnostic Trouble Code P0237

P0102Moderate Impact

Mass Air Flow (MAF) Sensor Circuit Low

P0106Moderate Impact

Diagnostic Trouble Code P0106

Affected ECU Platforms

Marelli MJ9DFHDelco E78Bosch me17.8.8.1Hitachi Hitachi BED431/BED434 SH72533Bosch EDC17CV41unknown unknownMarelli MJ8F3HSiemens/Continental MSD81Siemens/Continental SIM2KSiemens SID803ABosch EDC15C7Delphi DDCR DELPHI MPC555

Commonly Affected Vehicles

FiatDucatoMarelli MJ9DFH
GACTrumpchi GS8Bosch me17.8.8.1
NissanQashqaiHitachi Hitachi BED431/BED434 SH72533
IvecoTectorBosch EDC17CV41
OpelAstraunknown unknown
BMW1erSiemens/Continental MSD81
Infinitirohens coupeSiemens/Continental SIM2K
FiatScudoSiemens SID803A

Based on data from 7+ vehicle brands. P0238 is not limited to these models.

Frequently Asked Questions

What does P0238 mean?â–¼
OBD-II diagnostic code P0238 relates to the turbo / boost system. This code is logged when the ECU detects a parameter outside its expected operating range.
Why does P0238 appear after ECU tuning?â–¼
This code may appear after ECU modifications when the affected system monitoring has not been fully recalibrated for the new operating parameters.
How do you prevent P0238 during remapping?â–¼
WEREMAP professional calibrations include comprehensive diagnostic management for all affected systems, preventing unnecessary fault codes while maintaining safe operation.
Which vehicles are affected by P0238?â–¼
P0238 is commonly found on Fiat, GAC, Nissan, Iveco, Opel, BMW vehicles equipped with Marelli MJ9DFH, Delco E78, Bosch me17.8.8.1, Hitachi Hitachi BED431/BED434 SH72533 ECU platforms.
What other codes appear alongside P0238?â–¼
P0238 frequently appears together with P0236, P0237, P0102, P0106. These related codes typically originate from the same system modification and should be addressed together in the calibration.

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