Emissions / AuxiliaryLow ImpactDiesel

P0490 — Diagnostic Trouble Code P0490

OBD-II diagnostic code P0490 relates to the emissions / auxiliary system. This code is logged when the ECU detects a parameter outside its expected operating range.

2+

Affected Brands

7+

ECU Platforms

1

Related Services

3

Related DTCs

Symptoms

What the driver typically experiences when P0490 is stored

!Check Engine Light
iFailed emissions test
iNo major drivability impact

Why does P0490 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 P0490

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 P0490

DTC Off

Related Diagnostic Codes

Codes from the same diagnostic system as P0490

P1350Low Impact

Diagnostic Trouble Code P1350

P1352Low Impact

Diagnostic Trouble Code P1352

P1412Low Impact

Diagnostic Trouble Code P1412

Affected ECU Platforms

Bosch EDC16C34Siemens/Continental SID803ASiemens/Continental SID806Siemens SID206Bosch EDC16CP31Siemens SiD 803ASiemens/Continental SiD 803A

Commonly Affected Vehicles

VolvoC30Bosch EDC16C34
CitroenBerlingoBosch EDC16C34

Based on data from 2+ vehicle brands. P0490 is not limited to these models.

Frequently Asked Questions

What does P0490 mean?â–¼
OBD-II diagnostic code P0490 relates to the emissions / auxiliary system. This code is logged when the ECU detects a parameter outside its expected operating range.
Why does P0490 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 P0490 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 P0490?â–¼
P0490 is commonly found on Volvo, Citroen vehicles equipped with Bosch EDC16C34, Siemens/Continental SID803A, Siemens/Continental SID806, Siemens SID206 ECU platforms.
What other codes appear alongside P0490?â–¼
P0490 frequently appears together with P1350, P1352, P1412. These related codes typically originate from the same system modification and should be addressed together in the calibration.

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