Q: code p0446

asked by on

I didn't notice I park the truck on a small hill at my inlaws. The rear passenger side was the only side up on the hill. I left it running for about 3 minutes. Came out down his drive way to the next downward hill going towards the highway. I wait for traffic to pass by for about a minute or two. Gave it gas and bam, check engine light came on. Took it to O'reilly to read the code, P0446. It sounds a little bit louder then before and that's from both the inside and outside. My question to you is how concerned should I be to get this problem fix? Will it mess my engine up to no return? Should I stop driving it? For a 1998 4Runner she still sounded good until this happened today. :(

My car has 206000 miles.
My car has an automatic transmission.

Hi there. A P0446 (evaporative emissions system gross leak detected-Toyota defined meaning) sets when there is a fault detected in the evaporative system. The evaporative system is an emissions system responsible for preventing the leakage of fuel vapor into the atmosphere. This will not damage the engine. However, this will fail an emissions test if required in your area. There are several possibilities as to what set the code, but I would take a look at the gas cap and see if it was loose or if it doesn’t seem to tighten correctly; it should have a nice clean click sound, not a crunch. Other possible faults will require a diagnostic tester and equipment to properly check the evaporative system for operation and leaks. YourMechanic has several available technicians to assist you with a check engine light inspection and provide an estimate and proper direction for repair.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Silhouette

Many different parts can cause the vehicle to overheat. The most common would be the thermostat, radiator, water pump, air in the coolant, or a coolant leak. When a vehicle overheats at idle the usual suspect is the radiator fans....

Q: Check Engine and Service 4 Wheel Drive lights on.

Hi there. These issues that you are having would not be related to a tune up or oil change, though they should be done if they are over due. Since the check engine light is on you need to start...

Q: New battery,belt and alt but voltage drops and squeals under load

Hello, It sounds like you may have a problem with the voltage regulator. As you know, when turning on an accessory like the A/C, this puts an additional load on the motor which results in the motor needing to create...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.