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the oil service light is covered in the operators guide, lost that?
05 Cherokees are not here in usa. (this is a USA forum , sure)
so where are you?
not telling that, you get answers from USA book, that is wrong.
so...... fess up. or fail.
ours ended in 2001
but in Europe (say) the Cherokee is a Liberty, so....
go to jeep and get a free operators guide and read it , in your country.
Yeah it can safely run without a thermostat, but it will probably have a check engine light on later for code P018--engine temp too cold for too long. The engine will perform better with the thermostat and will get better fuel economy with the thermostat in place.
The shop service manual is rather vague on this subject.
It says that you must select "Service Interval" and once in the service interval display, the interval can be changed by pressing the "Step" button.
The "Reset (Yes/No)" display only becomes available when the service interval is changed.
It doesn't explain where these buttons or the display is located.
This proceedure is probably better explained in the Owner's Manual.
Actually the newer cherokees are a little more complicated, it's not a reminder for an oil change. It is for an emssions service that should be performed according to the dealer. Here is the rest procedure
Turn ignition to on position, but do not start.
Depress brake pedal fully twice.
depress excellerator very slowly twice
Turn ignition off & that will reset the perform service indicator.
I am mechanic & we are getting frustrated because the dealers do not want to release this info to anyone, they want your money! Can you believe if you did not get them to perform the service they charge you a 1 hour shop rate??
recheck the oil on the dip stick. look for any leaks that you were not aware of. make sure your car is on level ground when you check the oil and mwke sure the oil is warm before you also make sure the engine is off this will give you true reading and the oil will settle when is warm
the air pressure in the spare tire is low add air to proper pressure and it will reset itself spare pressure low the perform service could also be for tire but check owners manual for reset service reminders or have scanned at an auto store sum,such as auto zone / advanced auto do it for free and can reset the code via scanner
The service 4 wheel drive light comes on because there's a problem. The biggest causes of this I've seen are a software glitch in the final drive control module which the dealer can fix by reprogramming and the other is usually the electric actuator on the front axle housing. The only light that comes on by a timer is the one that says, "perform service" in your overhead console or odometer.
when was the last time you put in fuel injector cleaner? I put in Lucas Oil Injector cleaner every other or every oil change.
There are alot of factors affecting your gas mileage. Tire wear, tire pressure, wheel alignment, air filter, fuel filter, spark plugs, oxygen sensors, just to name a few. So to say what you need is just shooting in the dark without more information. I would probably start with your oxygen sensors, and then perform a tuneup. If your vehicle pulls to one side or the other when driving on the highway you need to stop into the shop for a wheel alignment.
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