Ac don't work what can cause that on a 2001 jeep grand cerokee limited

SOURCE: 2001 Jeep Grand Cherokee Limited is squeaking

duse the howl go away when you trun a conner ?if it duse its a wheel bearn. as for the squeak its hard to pin point. try finding some one how duse mud run they would be ableto help you with the howl noise. have a nice day

SOURCE: 2001 Jeep Grand Cherokee Limited..heating system

You may have the blend doors problem which means the blend doors are in the closed position only allowing cold air. They need to be fixed. Google "heatertreater" to see full explanation and fix.

Testimonial: "Thank you so much we`ll see if that`s the prob. hopefully it`s something simple cause it`s cold!!!"

SOURCE: I have a 2001 Jeep Grand Cherokee - Limited My

That's a generic O2 sensor circuit overvoltage warning. Did they find any additional codes? Also, did they clear the code for you? Your car is an OBD2-emissions car, meaning you'll have an O2 sensor before and after each catalytic converter. Is your engine the V8 or the inline 6? If it's the V8, you'll probably have four (although it could be two or three) O2 sensors. If it's the inline 6, you likely only have two. I'm asking about additional codes because that one doesn't help narrow down which sensor is bad. Have you noticed your gas mileage dropping at all? Or a buildup of black carbon soot in the tailpipes? Maybe less power than usual? If so, it's probably a primary (pre-cat) O2 sensor. Those are the ones that determine how much fuel the engine will be fed. If you don't have any discernable difference at all, it's probably a secondary sensor (post-cat). The issue I have is, either of those should throw at least one additional code (either to indicate which sensor is going bad, or in the case of a secondary sensor, you'll usually see a "catalytic converter below threshold" or similar code, since the secondary sensors are used by the computer to see how well the cats are working).

Any additional codes in there, or symptoms you can describe?

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SOURCE: Changing spark plug wires on 2001 Jeep Grand cherokee

yah direct ignition coil pack does away for the need a a distributer cap and rotor.much higher energy ignition system where the computer tell when to fire.if that helps.not hard to change.as long as you change them one at a time so you don't screw up the order.

SOURCE: 2001 Jeep grand cherokee motor knock 4.7 motor

First, if the noise is from the upper part of the engine and is more of a tapping than a knock, likely you have a problem in the valvetrain, most often a bad lifter or worn rocker arm. If the noise is low, deep inside, the noise is from a bearing. This is generally accompanied by lower than normal oil pressure. Regardless of the underlying cause, correcting the cause will not stop the knock. To do that correctly, the engine needs to be removed and all crankshaft bearings and the crankshaft itself need to be replaced (crank can sometimes be "undercut" and thicker bearing shells can be used depending upon the amount of wear.) If caught very early, sometimes only one bearing can be replaced in-car, but in 99% of all cases I have ever seen, most will fail again, sometimes more severely if done this way.

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