Hello, My check engine light is on and I found my gas cap loose. I have secured it and wondered when/if the check engine lite will got off if that was the problem. I have been driving the car for 3 days and the lite is still on. Will it take several complete drive cycles or will the code have to be erased by a scanner or other means ? Thanks for any help, John K
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Re: 2003 Highlander (AWD V6)
The gas cap turned the light on ( I assume you knew that), go to kragen auto and ask them to run a OBD 2 code test, when they get the code ask if they will clear it for you with the scan tool, this is free, other parts stores do this as well for free. If you want to wait the light will clear after a complete drive cycle, this can take up to week depending on what kind of useage the car gets.
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I'm not certain if it would physically bolt in, but it would be a nightmare to get the electronics working properly. I found that the 3.4L isn't a bad engine, aside from intake gasket leaks. There is an updated intake gasket set available that seems to be working great.
Hello. Welcome to FixYa. Please allow me to assist you. The Check Engine light comes on for many, many different reasons. The most common reason is the gas cap being loose. I would check the cap for being loose. If it is loose, drive the car for 10-15 miles to see if the light goes out. If the cap is not loose, you should go and take the car to someplace that can scan the car's computer to get the codes, the reason for the light being on. Autozone stores do this for free. Get us the codes, and then we can isolate your problem better.
P0442 and P0456 are both evaporative emission error codes due to a small leak. The most common cause is a leaking gas cap or hose leak on that system. I did not list a code for your 0513. I am sending you a little information about your problem.. Best of Luck to you..
2003 Lexus RX300 3.0L
2003 Toyota Sienna 3.0L
2003 Toyota Highlander 3.0L, Eng Cfg V6, Eng Des 1MZFE, USA/Canada
2004 Toyota Avalon XL 3.0L
Check engine light is on with trouble codes P0442 and P0456. The codes are evaporative system small leak codes.
1. Verify that the gas cap is a factory Toyota gas cap and visually inspect that all hoses and lines are tight and connected.
2. Locate the canister closed solenoid and the vacuum switching
valve on the canister. Manually ground them and verify that they operate
and function. The canister closed solenoid is normally open and should
close when grounded. The vacuum switching valve on the canister is
normally closed and needs to open when grounded.
3. Verify that the hoses are not loose or pulled off the canister
closed valve on the air cleaner housing. This has been a common problem
on some models.
4. If no problem is found, the next step is to ground the canister
closed solenoid and the vacuum switching valve under the vehicle and
simulate an evaporative test and verify that the system holds a vacuum
and functions normally. When the solenoids are grounded, back probe the
Blue/Black (L/B) wire on the pressure sensor, and with no vacuum or
pressure, the voltage should read around 3.3 volts. Start up the vehicle
and turn on the purge vacuum switching valve and use engine vacuum to
draw down the system to around 2 volts on the pressure sensor. If the
voltage does not increase rapidly, there is no problem. If the voltage
increases quickly, look for the leak in the evaporative system.
Canister Closed Valve Disconnected Canister Closed Valve (CCV) Hose Gas Cap Harness Vacuum Switching Valve - For the pressure sensor.
if the air filter was recently inspected or changed, look for the vacuum hose to be disconnected from the valve located on the air filter cover. another source may be the gas cap either loose or with the tether strap caught under it preventing a proper seal
If you live near an AutoZone they used to offer free check engine light diagnostics.
See what code they can retreive from the computer with their device and check it against the list of codes. It may not just be a missing Gas cap code. There are hundreds of codes computers can return.
under the hood on the left side is a fuse panel, if there is a single EFI fuse, remove it for 30 seconds or so, if there is more than 1 efi fuse remove them both along with the fuse marked e.t.c.s. leave them out for 1 minute or so and that will erase the code and reset the light. make sure the key is switched off before removing fuses