Q: Refrigerant leak

Quite a few things can account for an engine running rough. It could be just one cylinder misfiring, or multiple. If the Check Engine Light is on, the computer has detected a problem and the code(s) will help narrow it...

Hello! A knock sensor code can indicate faulty wiring to the sensor, or a faulty sensor itself. The wiring of the knock sensor can be checked by performing a continuity test, and the resistance of the knock sensor can be...

Some economy late model vehicles, like the Sentra you are considering, are not equipped with keyless entry. I highly doubt the owner lost the remotes. It is possible to buy an aftermarket keyless entry system (https://www.yourmechanic.com/article/how-to-purchase-a-remote-keyless-entry-system-for-cars-by-brady-klopfer) and have it installed....

It sounds like your mode door actuator may have failed. The mode door actuator is responsible for controlling the mode door. The mode door is a door inside your dash that will open and close to certain points to guide...

It looks as if you might have some sort of electrical gremlin inside your Oldsmobile Alero. I had a similar problem with my 2001, and we determined that it was a bad ignition relay (https://www.yourmechanic.com/article/how-to-replace-an-ignition-relay-by-timothy-charlet) that was shorting out the...

Hi there - check all your fluid levels, but check your engine coolant level (https://www.yourmechanic.com/article/how-often-do-i-need-to-top-off-my-coolant) most closely. The coolant GM uses for your engine (Dexcool) is, in fact, orange - not pink as most transmission fluids. Engine coolant will evaporate,...

Hello, thank you for writing in. You need to start by considering the symptoms. If they are exactly the same, the issue may have been a faulty replacement part. It is not terribly uncommon, but is even more frequent in...

Hi there. As far as I'm aware, the valve covers on a V6 3.5 Liter Nissan engine are made of steel and not plastic or a polymer. If the valve cover was a strong polymer (or plastic), the valve cover...

Hi there. Generally speaking, when this type of problem occurs, its caused by one of two transmission issues. Either the torque converter is starting to fail or you have an inner leak or obstruction of transmission fluid, caused either by...