Skip the auto shop - Our mechanics make house calls

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.

A: Hi there. A P0446 (evaporative emissions sy...

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?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Can i fit a mitsubishi v6 into my hylux?

I would recommend searching around an online forum to see if anything like this has been done before. You could start with a google search for 1995 Toyota 4runner engine swap. This will likely lead you to multiple sources of...

Q: Service engine light only in warm weather

Hello. Typically the service light is a vague warning and can indicate something as simple as too many miles between oil changes to potentially serious faults in the engine. The problem could be totally benign or very serious, and a...

Q: The truck cut out suddenly

Code P0722 is an output shaft sensor code for the transmission. While that may be an indication of an issue, it would not cause the truck to just quit. A catastrophic failure of the fuel pump, ignition system, or engine...

Related articles

P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
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.