OBD code information sheet
https://obdauto.ro/cod/P0403?lang=en
EGR A Control Circuit/Open
Available definitions for this code
Choose the correct manufacturer. The same code can have different meanings; a definition without an identified make does not confirm applicability to your vehicle.
Imported definition with general diagnostic supplements. The code indicates an area to check, not a confirmed failed part.
Sources, methodology and limitations
- DTC Database — definiții OBD-II
Supports: code definition, community definition
- AUTODOC
Supports: symptoms, possible causes, checks, components to inspect
Checked:
- Catalogue MIT licence
General sources explain definitions and principles; they do not confirm a universal repair. Use VIN-, engine- and controller-specific service information.
How we research the information →Report a problem
Technical explanation
EGR A Control Circuit/Open. The supplemented diagnostic sections include their sources. This is general guidance; verify applicability to the exact vehicle.
Symptoms
- Engine warning light; running may become uneven.
Possible causes
- 01Open or shorted EGR control circuit.
- 02EGR actuator or connector fault.
Diagnostic checks
- 01Check EGR supply, wiring and control against the circuit diagram first. P0403 is a circuit fault, not the same as insufficient flow P0401.
System and diagnostic diagrams
Conceptual illustrations of the system; verify the actual configuration and tests in vehicle-specific documentation.
Exhaust gas recirculation / EGR
Simplified exhaust gas routing. Original conceptual diagram, not an exact component location or an OEM repair procedure.
View full-size diagram →Parts involved
- Inspect: EGR valve, connector and wiring.
Repair cost calculator
Indicative Romanian repair budgets, depending on the diagnosed repair. Choose your vehicle and compare available scenarios.
Model, year and engine (optional)
Available ranges are not yet validated for each year and engine code. Confirm compatible parts and access requirements with the workshop.
Display prices
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Continue your research
Links to related systems, warning lights and vehicle examples.
Experiences with this code
User-reported cases published after moderation. Approval does not verify the diagnosis; the same code can have different causes.
No approved English experiences for this definition yet.
