OBD-II DTC · SAE J2012

P0490

Exhaust Gas Recirculation "A" Control Circuit High

EGR → Suppressible (off-road only)

What P0490 means

P0490 is a standard SAE J2012 powertrain diagnostic trouble code with the defined meaning: Exhaust Gas Recirculation "A" Control Circuit High. This is the OEM-agnostic definition; specific manufacturer interpretation may add detail (subsystem, bank, sensor location) but the core meaning is consistent across all OBD-II compliant vehicles since 1996.

Can this code be suppressed via ECU tuning?

Very common service. EGR mechanical failure (sticking, carbon buildup) often pairs with ECU-side EGR off. Off-road or motorsport only.

Related codes in the P04xx family

P0400P0401P0402P0403P0404P0405P0406P0407P0408P0409P0410P0411

Need P0490 resolved on a real ECU?

Softechpro's ECU tuning software can suppress most powertrain DTCs at the firmware level for off-road and motorsport use. We support 1,400+ ECU files including Bosch EDC15/16/17, MD1, MG1, MED17, Siemens, and Delphi.

Get Softechpro V5 — €299 lifetime Or request a custom file