Q: The check engine, Trac off and Vsc light came on my car. The code that came up is P0446 (Evap System Vent Control Fault).

asked by on

I drive 2001 toyota sienna with 100,000 miles on it. The light came on after three weeks of purchasing my car. I got the code by getting it scanned by a shop. The codes have not gone away, it's been 3 months now. I tried tightening the gas cap, it didn't work. I also tried putting 93 octane gas, it didn't work. After one week of trying these steps, the lights went away for 3 days in between and came back on after the 3 days. Now it has been about 2 months since the lights have remained on.

My car has 110000 miles.
My car has an automatic transmission.

Hi there. That light is not going away until the fault has been properly diagnosed. The code may or may not be the same. The code that is stored is a guide for a qualified technician to use. It does not offer a diagnosis, only a guide to the system with the fault. The code you mentioned, PP0446, is an evaporative emissions code when the system detects a fault during self testing. This system prevents the escape/release of fuel vapor into the atmosphere as regulated by our lawmakers. I strongly suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts. Your Mechanic has several available technicians that can assist you with a check engine light inspection.

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
  1. Home
  2. Questions
  3. The check engine, Trac off and Vsc light came on my car. The code that came up is P0446 (Evap System Vent Control Fault).

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: Why does my Engine sounds like a tractor.

Hey there. Your symptoms sound like many of your problems may be coming from a failed engine mount. The engine mount can fail and allow some extra movement of the engine and transmission assembly. To have this verified, a certified...

Q: I accidentally put Stop Leak in the engine and drove about 600 miles afterwords. After getting to my destination, that's when i re

Hello, you need to have the engine oil and filter change as soon as possible. You should be fine with that issue. If the vehicle is still having overheating issues that should as well be inspected. If you'd like, a...

Q: I accidentally put diesel in my gasoline engine car drove it for about 2 mins then car stopped what do i do after this

The best thing to do would be to have the fuel drained out of the tank by a qualified professional. Once the fuel is drained out of the tank by a qualified professional, you can bend refill the tank with...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...