Emissions / AuxiliaryLow ImpactPetrol

P0442 — Diagnostic Trouble Code P0442

OBD-II diagnostic code P0442 relates to the emissions / auxiliary system. This code is logged when the ECU detects a parameter outside its expected operating range.

5+

Affected Brands

5+

ECU Platforms

0

Related Services

1

Related DTCs

Symptoms

What the driver typically experiences when P0442 is stored

!Check Engine Light
iFailed emissions test
iNo major drivability impact

Why does P0442 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 P0442

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 P0442

Related Diagnostic Codes

Codes from the same diagnostic system as P0442

P0456Low Impact

Diagnostic Trouble Code P0456

Affected ECU Platforms

Delco E80Bosch MED17.1.27Bosch ME17.8.3 MED17.3.3Bosch MED9.1Bosch ME9.7

Commonly Affected Vehicles

ChevroletCOLORADODelco E80
VWJettaBosch MED17.1.27
Aston MartinV12 Vantage SBosch ME17.8.3 MED17.3.3
AudiQ7Bosch MED9.1
MBMLBosch ME9.7

Based on data from 5+ vehicle brands. P0442 is not limited to these models.

Frequently Asked Questions

What does P0442 mean?â–¼
OBD-II diagnostic code P0442 relates to the emissions / auxiliary system. This code is logged when the ECU detects a parameter outside its expected operating range.
Why does P0442 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 P0442 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 P0442?â–¼
P0442 is commonly found on Chevrolet, VW, Aston Martin, Audi, MB vehicles equipped with Delco E80, Bosch MED17.1.27, Bosch ME17.8.3 MED17.3.3, Bosch MED9.1 ECU platforms.
What other codes appear alongside P0442?â–¼
P0442 frequently appears together with P0456. These related codes typically originate from the same system modification and should be addressed together in the calibration.

Ready to Get Started?

Create your free account and access our full vehicle database and tuning services.

Create Free Account