Check engine light on;

Have vehicle scanned for codes at autozone or similar this will give you an idea what is wrong

Repair the problem, then reset the error with an OBDII scan tool.

you should check your compression ,and timing belt .If your engine doesnt start your check engine light wont go out until the engine cranks up

Use Google & ask the question

Start with the code & type: 2000 Honda OBD P1340

All the causes & solutions are on the internet, most likely
in about a hundred places

Just remember to study what is there, because codes
have nothing to do with changing parts.

HO2S12 (Bank 1 Sensor 2) is the after catalytic converter O2 sensor.


Hope this helps?

A sensor may still be disconnected from when the work was done or a vacuum line is still disconnected. Sometimes one is overlooked when everything is put back together. If your check engine light is on, it means the computer has set a trouble code. Get the code read (major auto parts stores will do it for free) and it should lead you to the trouble area.

is it throwing the code then the part is bad

This is not possible without an error code reader Unless you have check engine or service engine light Then you can hotwire the port for connecting scanner
and it will flash the code to you using the check engine light on dash
But its quicker to use a reader.
Different car models you can get to flash codes to you contact you car dealer to enquire about it.

alternator on its way out, replace alternator bushing.

There is not a dipstick for the automatic transmission on the 1999 Honda Passport. There are two plugs on the bottom of the transmission - the lowest one is the drain plug and the one located higher is the overfill plug. You should have a fluid temperature gauge as it is recommended that the temperature be between 90* F and 135* F when checking fluid level. (I believe you can order from dealer - I have also heard that running the engine for 10-15 min will put you near the proper temperature - to be certain, the temperature gauge is the right way to do it.) Run engine for a few minutes to reach optimum temperature. The vehicle must be on level ground and at idle to properly check fluid level. With proper temperature reached - and engine running at idle - set parking brake - remove the fill plug and add fluid with a syringe or small pump until it just starts to run out of the opening. Do not open the overfill screw with the engine stopped. Replace the fill plug and shift through gears - then remove and repeat one time to achieve proper level.