P0489 Exhaust Gas Recirculation Control Circuit Low

P0489 points to a low condition in the Exhaust Gas Recirculation control circuit. The controller sees EGR control voltage, current, or feedback below the expected range.

Code details

Generic OBD-II · P0

System: Emissions
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace the EGR valve until the low control circuit reading is traced to wiring, driver, power feed, or actuator load.

Symptoms of P0489

Check-engine light, often with no obvious change in how the car drives.
A failed emissions test or incomplete readiness monitors.
Sometimes a faint fuel-vapour smell (on EVAP codes).

Common causes of P0489

A worn catalytic converter or an oxygen/air-fuel sensor reading out of range.
EVAP leaks — a loose or failed gas cap, cracked hose, or purge/vent valve.
Exhaust leaks, fuel-trim problems, or a fault in a related monitor.

Useful checks before replacing parts

Check EGR command, control voltage, fuse feed, ground or driver control, current draw, freeze-frame load, and related low-input codes.
Inspect for short-to-ground faults, open power feed, damaged EGR wiring, connector corrosion, actuator load problems, and harness heat damage.
Command the EGR actuator and verify both electrical response and MAP or MAF change.

Related OBD-II codes

These nearby emissions entries can help compare wording and pin down the fault area.