Q: How do I turn on the headlights?

Differential fluid on a lot of modern cars has it built in the transmission. For example, for a 2002 Toyota Camry, when you change the transmission fluid you are also changing the differential fluid (https://www.yourmechanic.com/article/how-often-do-i-need-to-replace-my-car-s-differential-fluid). They share the common fluid....

It really depends on how you deal with the system. Some guys are worried about damaging the brake master cylinder. So they open the bleeder valve on the brakes and then squeeze the caliper back in when they change the...

The belt on your 2000 Plymouth Voyager is used by the engine to turn the A/C pulley along with the water pump, power steering pump, and other accessories. Any one of these items could be the cause of the belt...

Hi there, thanks for writing in about your 2004 Cadillac DeVille. Hard shifting can be caused by several items. I don't feel like the pickup screens are contributing to your concern. The transmission uses hydraulic pressure to control the shifts....

This is a common problem which often is related to the mass air flow sensor. This is a unit that regulates air intake as it is mixed with fuel prior to being injected into the engine. When this is not...

The only way to determine the failure mode of the bolts is to send the "assembly" to a forensic laboratory equipped with a scanning electron microscope. If the bolts were loose, there would have been noticeable vibration and noise prior...

This may be a sign of a failing throttle position sensor (https://www.yourmechanic.com/services/throttle-position-sensor-replacement). The throttle position sensor (TPS) is a sensor used to monitor the throttle position of the throttle plate inside the throttle body in relation to your foot position...

Hi there: Before you have one of our mobile mechanics replace the crankshaft position sensor, you should have them complete a full check engine light inspection (https://www.yourmechanic.com/services/check-engine-light-is-on-inspection) first. It's possible that the code being displayed on your code reader is...

Hi there. This question is very difficult for us to answer accurately, as we're not there to inspect your Cavalier personally. However, this is a job that should be completed by your insurance company or a local body repair facility....