Question about Cars & Trucks
Posted by Anonymous on
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Posted on Jan 02, 2017
P0442, P0455 AND P0456 are all evaporative leak monitor test failures (small, medium and large leaks). These codes appear anytime the integrity of the air space above the fuel or the lines to/from the vapor canister or purge valve. If there is no damage to the canister, check the lines that run under the van from the fuel tank and canister to the purge valve (under the hood). Also, check to make sure that the hoses are not split or disconnected where they connect to the purge valve. The P1684 is abit more confusing. This is not a valid DTC for your vehicle. It's possible the scanner the shop you went to is an OTC scanner that is reporting a false code. It's also possible they wrote it down incorrectly. The closest thing that makes any sense is a P1486 which would indicate a pinched hose in the same monitor system as the other 3 codes. Best of luck!
Posted on Jun 20, 2008
YOU CAN GO TO ANY ADVANDED AUTO PARTS AND THEY CAN HOOK UP A OBD2 SCANNER, WE THEY DO ASK THEM TO RESET THE LIGHT FOR YOU.. THIS IS A FREE SERVICE TO THE PUBLIC..GOOD LUCK KEITH..
Posted on Mar 14, 2009
P0700: EATX Controller DTC present
P1684: Battery was desconnected
P0442: EVAP leak monitor medium (.040). Leak detected.
P0455: EVAP leak monitor large. Leak detected.
P0456: EVAP leak monitor small (.020). Leak detected.
I suggest check the lines and flow it down to the ldp (leak detection pump) that is just behind the steering gear under the van It has a wire connector and 2 large EVAP hoses. look for any split or crack then follow the lines back to the tank. Even a small crack is a leak.
Hope helped with this. Remember rated this help. Good luck.
Posted on Nov 24, 2009
SOURCE: troubleshoot codes
po442 evap system small leak po455 evap system large leak po456 evap system very small leak. the evap system is located under the driverside of van. from all indication you have a hole in a line or a bad connection on one of the lines. inspect and repair.
Posted on Apr 23, 2010
SOURCE: I lost the owner's manual
It sounds like the tire pressure monitor warning light. Does the light look like this?
Check and adjust the pressure in all the tires (most Toyotas even monitor the spare tire pressure so check that also). If you find one tire with significantly lower air pressure then the rest bring the car to a repair shop to have them find and repair the leak. Once the air in the tires are correct the light will go off.
Posted on Jul 31, 2010
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