P1442 on Toyota
Evaporative Emission Control System Leak Detected (Small Leak)
P1442 on Toyota vehicles indicates evaporative emission control system leak detected (small leak). Au7o has documented this code across 1 Toyota model — most commonly on 4Runner. This is a manufacturer-specific EVAP (evaporative emissions) code; on Ford it generally means the computer detected a small leak in the system that captures fuel-tank vapors to keep them from reaching the atmosphere. On some other makers it refers to the EVAP leak-detection pump control circuit, so the exact meaning varies by manufacturer. It is an emissions code, not a drivability safety issue, though it will keep the check engine light on. The most frequent cause is something as simple as a loose or worn gas cap. Typical repair costs on Toyota range from $900 to $3,000, depending on the specific model and root cause.
Common Causes of P1442
- •Loose, cracked, or worn fuel filler cap
- •Cracked or disconnected EVAP hose or vacuum line
- •Faulty purge or vent valve/solenoid
- •Leaking or cracked charcoal (EVAP) canister
- •Damaged fuel-tank or filler-neck seal
- •Faulty leak detection pump (on makers that use one)
P1442 on Toyota by Model
Toyota 4Runner(1 issue)
- Secondary Air Injection Pump/Valve Failure Triggering Limp Mode on 4.7L V82005-2009
The 4.7L 2UZ-FE V8 used in later 4th-generation 4Runners is known for secondary air injection system failures involving the air pump and switching valves. When the system sticks or fails electrically, the truck may illuminate the check engine light and enter reduced-power or limp mode. This problem is widely documented across Toyota V8 trucks and SUVs of the era and can be very expensive when repaired with OEM components.
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View P1442 across all makes →Frequently Asked Questions
What does P1442 mean on Toyota?▼
P1442 stands for "Evaporative Emission Control System Leak Detected (Small Leak)." This is a manufacturer-specific EVAP (evaporative emissions) code; on Ford it generally means the computer detected a small leak in the system that captures fuel-tank vapors to keep them from reaching the atmosphere. On some other makers it refers to the EVAP leak-detection pump control circuit, so the exact meaning varies by manufacturer. It is an emissions code, not a drivability safety issue, though it will keep the check engine light on. The most frequent cause is something as simple as a loose or worn gas cap. On Toyota specifically, this code is documented across 1 model.
What causes P1442 on Toyota vehicles?▼
Common causes on Toyota: Loose, cracked, or worn fuel filler cap, Cracked or disconnected EVAP hose or vacuum line, Faulty purge or vent valve/solenoid, Leaking or cracked charcoal (EVAP) canister, Damaged fuel-tank or filler-neck seal. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P1442 on a Toyota?▼
Repair costs on Toyota range from $900 to $3,000, depending on the specific model and root cause.
Which Toyota models have P1442 documented?▼
Au7o has documented P1442 on 1 Toyota model: 4Runner.