Popular questions

If you are suddenly having poor fuel mileage then you should also have a Check Engine Light illuminating. The light will most likely be indicating a problem with a sensor like an O2 sensor or a mass air flow sensor....

For the starting issue the drive authorization system should be looked at. Low battery voltage or a component failure can cause the starter to not turn over. The other items are maintenance items and can be taken care by a...

Hi Sonja. Thanks for contacting us today. Usually when a fuel pump or crankshaft sensor is not working, the vehicle will not start at all. It's more likely that you have a fuel system restriction or the engine is having...

Hello. A no start condition, especially an intermittent one can be caused by a wide variety of issues. A few common causes for a no start condition are problems with the fuel or ignition systems, or perhaps an issue with...

Hi Van, thank your for your interest! Our current services are expanding daily. Here is the current list of cities that we serve: https://www.yourmechanic.com/city. You can also visit https://www.yourmechanic.com/book/ to add a zip code to your service.

Hi there, thanks for writing in. If the noise is there even when the engine is running, then the balancer needs to be checked as well as the engine mounts. Either one of these will cause this to occur. I...

Hello, thanks for writing in about your BMW 750i. I have worked on automobiles for many years and replaced many valve cover gaskets, and have never heard of someone using a ruler for anything related to that repair. However, it...

The parts required will depend on exactly what has failed and that, of course, is determined through both a diagnosis and an inspection upon disassembly if it turns out that the transmission has to be rebuilt. Your car has enough...

Check the battery for any parasitic load applying to it. To do this, make sure that the battery is fully charged and remove the negative battery cable from the battery. Then put a digital meter cables on the negative battery...

This suggests you may have intermittently firing ignition coils which may be causing occasional misfires causing the rough idle you describe. This is somewhat common as the ignition coils begin to wear out and begin to sporadically. Ignition coils are...

Saturn became aware of a vibration like you are describing on many of their vehicles and designed a fix for it more than 10 years ago. The fix is described in Technical Service Bulletin (TSB) 00-T-57A. It calls for installing...

It has been a long time since a Volkswagen has been an economy car. It is less expensive to maintain than a Mercedes, BMW or a Volvo. but will be more expensive than similar Japanese models. Especially the turbo models....

The term "High Mileage" is a marketing term only and thus has no meaning in Tribology, the relevant science one relies on to measure and evaluate the technical appropriateness of engine oils. I am not aware of any published, public...

It may be from the exhaust or from one of the accessory components like the compressor, water pump or belt tensioner. You may have a bad catalyst in the exhaust. A mechanic like one from YourMechanic would be able to...

Hello. It should have gone off by now depending on how many miles you've put on it since the repair. Sometimes when a scanner reads a thermostat code it could be a coolant temperature sensor which sends a signal the...

Hello there, many faults will cause your 2006 Nissan Quest to not start or crank. You have done great in replacing the battery first, as this is the most likely fault in most cases. Other common is the starter, battery...

I would first test the motor or transmission mounts. If it is not the motor mounts, the vibration might be arising as engine load and speed "interact" with the gearing at that particular speed causing a dynamic balance issue. The...

Hello. Thanks for writing in about your A5 Quattro. You need to go into test mode for the computer to reset and test the oil level. If it still cannot calculate it, then you have a bad oil level sensor...

Hello. I would need to know the exact codes to be able to give good information about this. If you have a reoccurring misfire code, then a compression test needs to be done to see if there is an internal...

Hi there. Most of the time this is caused by a problem with the throttle body. I usually clean it out first and inspect it for wear. If there is wear around the throttle plate then it needs to be...

This is a common sign of a failing CV joint. A CV (Constant Velocity) joint is a shaft that connects the transmission to the wheels, essentially transferring the power from the drive train directly to the wheels. The CV joint...

Question was sent to CS for to repair a coolant leak on a 2010 Volkswagen Passat with a L4-2.0 turbo engine.

The speedometer gets the vehicle's speed from the transmission. There are two speed sensors used to control shifting. Input speed and output speed. The output speed sensor is used for the speedometer. If it malfunctions, it will store a trouble...

Hello. Based on your description, it does sound like this is an exhaust leak. Because exhaust pipes are made of metal, moisture will cause them to rust. Although it seems like this problem happened out of nowhere, it has actually...

You should check the sway bar bushings and links. You can do so by having someone bounce the car up and down and have the other person feel them by hand. You will be able to feel squeaking part. ...