Engine-Codes - Toyota - P0446 2006 TOYOTA PRIUS

P0446 2006 TOYOTA PRIUS - EVAP System Vent Control Circuit

Repair Importance Level: 1/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P0446 2006 TOYOTA PRIUS Possible Causes

  • Missing Fuel cap
  • Incorrect fuel filler cap used
  • Fuel filler cap remains open or fails to close
  • Foreign matter caught in fuel filler cap
  • Vent control valve harness is open or shorted
  • Vent control valve circuit poor electrical connection
  • Faulty vent control valve

How is the P0446 2006 TOYOTA PRIUS code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Tech Notes





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What is the cost to diagnose the P0446 2006 TOYOTA PRIUS code

Labor: 1.0

The cost to diagnose the P0446 2006 TOYOTA PRIUS code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
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When is the code detected?

The P0446 codes triggered when an improper voltage signal is sent to Engine Control Module (ECM) through EVAP canister vent control valve.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Possible a noticeable fuel odor caused by the release of fuel vapors

P0446 2006 TOYOTA PRIUS Meaning

The Evaporative System (EVAP) canister vent control valve is located on the EVAP canister and is used to seal the canister vent.
This solenoid valve responds to signals from the Engine Control Module (ECM). When the ECM sends an ON signal, the coil in the solenoid valve is energized. A plunger will then move to seal the canister vent. The ability to seal the vent is necessary for the on board diagnosis of other evaporative emission control system components.
This solenoid valve is used only for diagnosis, and usually remains opened.

More Information

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