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Grand Cherokee

You need to check to make sure the cooling fan is coming on. If it is not then further diagnosis will need to be done by scanning the computer to see if fan control is turning on to see if...

The problem sounds like you have an exhaust problem. You may have a broken pipe or bad convertor and is rattling in the exhaust. Have a mechanic like one from YourMechanic inspect and diagnose the problem for you.

It is usually best to change all the coils when chasing a misfire with engines of this age and mileage. If one is weak, they are likely all weak. When you changed the plugs, was there oil in the spark...

Hello, thank you for writing in. It is possible that the vehicle could be having a switch or ground connection issue. The turn signals and the hazards are wired separately so that your hazards will work independently in emergency situations....

With your car having 250,000 miles on it, some mechanical issues may be expected at this point. I am assuming here that the transmission has this many miles as well. This is about the time that all the friction material...

The starter's yellow wire will need to be checked for power when you turn the key. If no power is present then you'll need to check to see if the starter relay's 40 amp power supply fuse (https://www.yourmechanic.com/services/fuse-replacement) # 10...

On head and block, those surfaces have to be measured before you apply a head gasket. If they are not flat within around .002 inches, you can get leaks and that alone can account for overheating. It is possible that...

The first thing to check is the transmission's fluid level (https://www.yourmechanic.com/services/transmission-fluid-service). If the transmission works in the other ranges, like park and drive, there is a very good chance the transmission will need to be rebuilt or replaced. If you...

This suggests that the low idle problem may be related to a faulty MAP sensor since the symptoms you describe point to the low idle issue when the engine is under a load when applying the brakes at idle. The...

This may be a sign of a faulty ignition coil. Ignition coils are coated with a varnish-like insulation that becomes brittle over time after being stretched then contracted repeatedly The insulation develops small fractures that open when heated and close...

Hi Connor. Thanks for contacting us today. In most cases when this occurs, it's due to a shift linkage or shift solenoid failure. It's also possible that you have damage to seals or gaskets inside the transmission case. The best...

Hi Nicole. Thanks for contacting us today. The question I would ask you is whether or not you were having the starting hesitation issue prior to having the vehicle serviced - or if it happened after. If it's been an...

There could be a combination of faults creating the shaking effect you are feeling. Certain tire defects, particularly internal belt damage or separations, as well as irregular tire wear will cause vehicle shaking, or shimmy, and such could be "set...

Hi There, What you are describing sounds like possibly a bad speed sensor or potentially a faulty transmission control module, which also controls the speed sensors. The transmission control module has various sensors such as vehicle speed sensors, wheel speed...

It sounds like you are having a problem with your transmission's shifting mechanisms. Have the shift linkage checked to see if the cable bushings are worn out. A mechanic, like one from YourMechanic, can give your car's transmission an inspection...

If you are getting a noise from the rear end when you put pressure on it by giving it gas then the cause is going to be the ring and pinion bearings most likely. Have the pinion bearing checked where...

This light will usually come on when one of two things are happening. Either the motor is in fact low on oil or the oil pressure sending unit (https://www.yourmechanic.com/services/oil-pressure-sensor-replacement) is not working properly and may be producing a faulty reading....

Hi there. Excessive oil pressure registering on the gauge can be due to a few different possible problems and would need additional testing to isolate the problem. The most common cause of the problem is the oil pressure sending unit...

Hi there, thanks for writing in. Most of the time this is caused by a fuel system issue. I typically check the fuel pressure first. If the pressure is low, then the pump is bad (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-fuel-pump). If the pump is...

It sounds like you may have a dirty or failing idle air control valve. The idle air control valve (https://www.yourmechanic.com/services/idle-control-valve-replacement) monitors the air intake as it is mixed with fuel prior to being injected into the engine at low speeds...