P0487 Exhaust Gas Recirculation Throttle Position Control Circuit

P0487 points to an Exhaust Gas Recirculation throttle position control circuit issue. The controller sees a problem in the throttle or flap used to support EGR flow.

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 clean or replace the EGR throttle before confirming control circuit, feedback, and mechanical movement.

Symptoms of P0487

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 P0487

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

Review EGR throttle command, position feedback, MAP or MAF response, EGR command, freeze-frame load, and related throttle or EGR codes.
Inspect throttle actuator wiring, connector condition, motor power and ground, feedback circuits, carbon buildup, sticking plates, and harness heat damage.
Command the EGR throttle and verify that electrical feedback and actual airflow response match the request.

Related OBD-II codes

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