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.
Check Engine Light Due to EVAP System Fault on Toyota Sienna
Average mileage: 126,040 (2,300–226,000)
26 people reported this problem
2001 Toyota Sienna 200,000 mi, Visitor
replaced canister and both VSVs under the hood. Still have the error
2002 Toyota Sienna 118,000 mi, Visitor
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.
2007 Toyota Sienna 98,000 mi, Visitor
Dealer mechanics tell me it needs a charcoal canister replacement. Says the part costs $1100.00 not including labor. Is this really necessary???
2003 Toyota Sienna 226,000 mi, Visitor
Had to take it in and it cost me about 300.00 to repair.
2003 Toyota Sienna 102,750 mi, Visitor
Check engine light due to EVAP system. p0446
2007 Toyota Sienna 58,000 mi, Visitor
Dealer says new charcole filter for 610 parts + labor. Seems very high for a filer
1999 Toyota Sienna 185,000 mi, Visitor
engine light and code.changed charcoal filter and switch on fuel rail.fixed the problem.
2015 Toyota Sienna 2,300 mi, Visitor
Dealer to replace canister, I suggested new gas cap as well. Cheap fix
Engine lights came on. Took to the dealer and they said that my charcoal canister is bad. They want over $1,000 to replace it.