Honda, Acura Warning Message
“Check Emission System”
Honda's emissions system has detected a fault. This is distinct from the generic check engine light and specifically targets the catalytic converter, EVAP system, or exhaust gas recirculation components.
moderate severity
Common Causes
- Catalytic converter efficiency below threshold
- EVAP canister purge valve failure
- Fuel cap loose or damaged
- Oxygen sensor failure
- EGR valve carbon buildup
Immediate Action
Check the fuel cap first. If the message persists after tightening, schedule diagnostic service. The vehicle will fail emissions testing.
Typical Repair Cost
$100–$2,000