The Check Engine Light may illuminate due to an evaporative emission (EVAP) system fault. Our technicians tell us these EVAP system faults can be difficult to diagnose but it is not uncommon to find a failed charcoal canister or a loose or worn gas cap.Google+
Car Problem Reports
Toyota Sienna Check Engine Light Due to EVAP System
Toyota Sienna Problem
Average Mileage: 172,472 mi (102,750 mi - 226,000 mi)
Visitor, 2002 Toyota Sienna, 118,000 mi
Check engine light went on. Mechanic diagnosed P0440 problem - Evap system. Checked all - hoses, gas caps, solenoid, valve, and pinpointed to carbon canister. Not fixed yet, but will cost $375 parts + $50 labor.
Visitor, 2003 Toyota Sienna, 226,000 mi
Had to take it in and it cost me about 300.00 to repair.
Visitor, 2003 Toyota Sienna, 102,750 mi
Check engine light due to EVAP system. p0446
Visitor, 2001 Toyota Sienna, 200,000 mi
replaced canister and both VSVs under the hood. Still have the error
Visitor, 1999 Toyota Sienna, 185,000 mi
engine light and code.changed charcoal filter and switch on fuel rail.fixed the problem.