The check engine light is on but there doesn't seem to be any problems, it's been on for monthz, why is it on and how do i get it to turn off?

what year make model engine etc.................................

is the check engine light on ,any codes

Could be a number of things but may want to begin by checking wiring to starter, battery, or even the ignition switch. These components may not turn your engine light on.

I have a Montero and it won't start with the key in the engine compartment but it will only start using my key pad what should I do i did just get another battery the other day could that be the problem

Hello! A few necessary items to successful troubleshooting; What engine is in the vehicle and, since it's a 1996, it has OBDII diagnostics and a Check Engine Light...Is the light on?...If so do you have access to a scanner to find out what trouble code or codes are stored?...Lastly, have you checked for spark? Because your saying it doesn't "seem" to be getting spark...Hate to hit you with a lot of questions but without these particular pieces of information it would be difficult to narrow down...Please add any thing else that seems important...Awaiting your reply...Guru...Saailer

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

check the breather pipe on the bottom of the inlet manifold ,difficult to see anjd reach (zetec engine) these split and perish causing idle problems

First of all, Hyundai Transmissions use a 'specific' fluid called 'SPIII' and ONLY SPIII. Any other fluid doesn't meet Hyundai's specification and can cause 4th gear slippage (which is the TTC - Torque Converter Clutch - frequently referred to as the "lock-up" converter). You should have had a Check Engine Light. The problem you describe regarding 'doesn't drop back to first when I'm at a stop' sounds like the transmission has gone into 'Fail-Safe' mode because of the 4th gear ration incorrect. In "Fail-Safe" mode, the trans stays in 3rd gear until you cycle the ignition key off, and then back on. You need to scan your engine's computer to see what/which trouble codes have been set/stored in it. You'll need an OBDII scanner to read any codes that might be there. When a 'check engine light' (MIL=Malfunction Indicator Lamp) is turned on, there is a DTC (Diagnostic Trouble Code) set/stored in the ECM/PCM (Engine Control Module/Powertrain Control Module). This code identifies which engine management system component/function experienced a malfunction. Once you pull/read this/these code(s), you can begin diagnosis.

If it runs fine and the idle is the only problem you could try idling it up some with the idle set screw on the throttle body it sounds like it may be a little bit out of time those toyotas have a fine lins on the timing.

Does the engine turn over? If it does, then check to see if the check engine light comes on when you turn the key to the on position. If it doesn't, then the PCM is not receiving power. Check the orange power wire usually located by the battery to make sure it isn't damaged. Repair if necessary. If the check engine light comes on when the key is turned to on then crank the engine while observing the light. Does it go out while cranking? If it doesn't, then a problem with the crank sensor signal is indicated. If it does go out then the problem might be fuel related. Disconnect the air cleaner hose to the throttle body. Have someone crank the engine over while opening the throttle slightly. Spray starting fluid into the engine to see if it tries to start. If it does then a fuel related problem is indicated.
CAUTION : Wear safety glasses during this procedure. Be careful around moving engine parts.

first check fuel filter and Pray it's clogged and it's not your fuel pump. Good luck!