How do I clear a service emissions message on a 2005 Mercury Mariner with a 3.0L engine. I have performed the required maintenance procedures at both 30,9000090's and 60,000miles. Still have message.

SOURCE: 2005 toyota camry 4cylinder

disconnect the positive battery cable for 3 min.reconnect and start it up,if light comes back on,there is a malfunction in computer system that controls your drivetrain.service engine soon light pertains to the computer,sensors,etc.this light is not for maintenance reminders!

SOURCE: Remove Oil maintenance required message on 2008 Toyota Highlander

This is the reset proceedure for a 2008 Highlander with a key-type ignition:

Turn the key ON, do not start the engine.

Look at the odometer, and verify that it displays "TRIP A". If it is on "ODO" or "Trip B", press the black stick next to the odometer to read "TRIP A".

Turn the key OFF.

Press in, and HOLD the black trip meter reset button, hold it IN.
DO not release it.

Turn the key ON, do not start the engine

Observe the Odometer display. You will see 5 dashes, then 4, then 3, then 2, then 1 dash, and finally, 5 zeros. Then, whatever number that was displayed on "TRIP A" will be re-displayed..

Now release the black trip meter reset stick.

This completes the reset procedure, and it will be back on in 5,000 miles, to remind you of you next oil change.

Hope this helps! Thanks for choosing FixYa!

SOURCE: Service emission sys warning message on ford Mercury Mariner 4DW 2005

Injector Cleaner is not in any owners manual

It is a few onces in many gallons of gas & does nothing

Check for codes & have the car diagnosed --as with any and
all issue from the past on any vehicle

If you over fill it you can get fuel into the evap canister