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Trouble code P1457 means: EVAP Emission Control System Leak Detected (Control Canister System) Need to check the EVAP canister for leaks in the hoses
First check and see if the chain between the throttle linkage and vacuum canister is hooked up. If it is then you probably have a vacuum leak somewhere in the system. Check the vacuum line going to the canister for leaks. If not then the canister itself is probably leaking or bad.
Perform a negative presure check
check ground wires under both doors
This is a powertrain code that signals an evaporation system monitor performance issue.
Check your owners manual.
check your charcoal canister, or evaporative purge system for a broken or missing vacuum line
They are used to monitor and check that the a/c system is working correctly......
Check your cord from the computer and monitor. If that is ok check your video card.
YES! The function of the evaporative emissions control system is to draw fuel vapors from the gas tank and fuel system, store them in a charcoal canister and route them to the intake manifold during normal engine operation. The most common symptom of a fault in the evaporative emissions system is a strong fuel odor. Check all hoses connected to it and the canister itself. Replaced needed parts. See a Jeep repair manual for details to fix yourself (easy) or take it to a dealer.
negative pressure check
Both Sony and Toshiba make combo TV/monitor systems. Other manufacturers such as Vizio probably do as well. Check TigerDirect. Also a Dynex flatscreen can be a TV/monitor system.