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 MANUALSTOYOTA2010TACOMA BASE, 4D PICKUP, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL (SFI) SYSTEM (1GR-FE) (DIAGNOSTIC CODES (P0451-P2A00) & CIRCUIT TESTS)SFI SYSTEMEVAP SYSTEMRELATED DTCS

2010 Toyota Tacoma Base, 4D Pickup, Standard

Related DTCS

2010 Toyota Tacoma Base, 4D Pickup, StandardSECTION Related DTCS

DTC No.	Monitoring Item	See
P043E	Reference orifice clogged (built into canister pump module)	Refer to DTC P043E: Evaporative Emission System Reference Orifice Clog Up; DTC P043F: Evaporative Emission System Reference Orifice High Flow; DTC P2401: Evaporative Emission Leak Detection Pump Stuck OFF; DTC P2402: Evaporative Emission Leak Detection Pump Stuck ON; DTC P2419: Evaporative Emission Pressure Switching Valve Stuck ON
P043F	Reference orifice high-flow (built into canister pump module)
P0441	Purge VSV (Vacuum Switching Valve) stuck closed Purge VSV stuck open Purge flow	Refer to DTC P0441: Evaporative Emission Control System Incorrect Purge Flow
P0451	Canister pressure sensor (built into canister pump module) noise Canister pressure sensor fixed/flat (built into canister pump module)	Refer to DTC P0451: Evaporative Emission Control System Pressure Sensor Range / Performance; DTC P0452: Evaporative Emission Control System Pressure Sensor / Switch Low Input; DTC P0453: Evaporative Emission Control System Pressure Sensor / Switch High Input
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	Refer to DTC P0455: Evaporative Emission Control System Leak Detected (Gross Leak); DTC P0456: Evaporative Emission Control System Leak Detected (Very Small Leak)
P0456	EVAP small leak
P2401	Leak detection pump stuck OFF (built into canister pump module)	Refer to DTC P043E: Evaporative Emission System Reference Orifice Clog Up; DTC P043F: Evaporative Emission System Reference Orifice High Flow; DTC P2401: Evaporative Emission Leak Detection Pump Stuck OFF; DTC P2402: Evaporative Emission Leak Detection Pump Stuck ON; DTC P2419: Evaporative Emission Pressure Switching Valve Stuck ON
P2402	Leak detection pump stuck ON (built into canister pump module)
P2419	Vent valve stuck ON (closed) (built into canister pump module)
P2420	Vent valve stuck OFF (vent) (built into canister pump module)	Refer to DTC P2420: Evaporative Emission System Switching Valve Control Circuit High
P2610	Soak timer (built into ECM)	Refer to DTC P2610: ECM / PCM Internal Engine Off Timer Performance

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

Fig 1: EVAP System DTC Malfunctioning Table

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.