Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSTOYOTA2009YARIS BASE, 4D SEDAN, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROL SYSTEM (1NZ-FE)SFI SYSTEMEVAP SYSTEMRELATED DTCS

2009 Toyota Yaris Base, 4D Sedan, Automatic

Related DTCS

2009 Toyota Yaris Base, 4D Sedan, AutomaticSECTION Related DTCS

MONITORING ITEMS REFERENCE

DTC No.	Monitoring Items
P043E	Reference orifice clogged (built into canister pump module)
P043F	Reference orifice high-flow (built into canister pump module)
P0441	Purge VSV (Vacuum Switching Valve) stuck closed Purge VSV stuck open Purge flow
P0450	Canister pressure sensor (built into canister pump module) voltage abnormal fluctuation
P0451	Canister pressure sensor (built into canister pump module) noise Canister pressure sensor (built into canister pump module) signal becomes fixed/flat
P0452	Canister pressure sensor (built into canister pump module) voltage low
P0453	Canister pressure sensor (built into canister pump module) voltage high
P0455	EVAP gross leak
P0456	EVAP small leak
P2401	Leak detection pump stuck OFF (built into canister pump module)
P2402	Leak detection pump stuck ON (built into canister pump module)
P2419	Vent valve stuck closed (built into canister pump module)
P2420	Vent valve stuck open (vent) (built into canister pump module)
P2610	Soak timer (built into ECM)

If any EVAP system DTCs are set, the malfunctioning area can be determined using the table below.

Fig 1: DTC Malfunction Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.