Q: Car will not start

I would recommend having your sunroof inspected (https://www.yourmechanic.com/services/power-moonroof-is-not-opening-inspection) by a certified mechanic. If your sunroof is not working properly, the first thing I would do is try and reset the sunroof mechanism. This can be done by either unplugging the...

Looking at the wiring diagrams, I see no relationship from a circuit standpoint meaning that power supply at the fuse to the circuit ground among these various electrical systems is not working. This means that the problem will most likely...

Instead of using a conventional mechanical throttle, your vehicle uses a "drive-by-wire" system. This design, throttle position, and accelerator pedal position are relayed to the control module via dedicated sensors. The control module then uses this information to control a...

Hi there, thanks for writing in about your 2011 Mercedes E550. This sounds like potentially a bad crankshaft sensor (https://www.yourmechanic.com/services/crankshaft-position-sensor-replacement). I would recommend having the car scanned to see which trouble codes show up.  More than likely, there will be more...

These bells indicate a problem that the built-in diagnostic system is unable to indicate on the dash (usually a burned out fault indication bulb). Replace the burned out indicator bulb on the dash, then check out the original problem by...

Hello there, a check engine light for too high of fuel pressure is unusual with your 2009 Audi Q5. There are one 2 possible faults going on. Either the fuel pressure is too high, or the fuel pressure sensor is...

A higher than normal idle can be due to a stuck open idle control valve or a vacuum leak in the intake when the engine is cold. You may have a bad cold start injector system. I would recommend having...

The best scenario is if the oil pressure sending unit is simply bad. The sending unit can be tested and/or you can simply tee in a known good gauge to rule the sending unit in or out as the cause....

The noise could be either an ignition coil misfiring and causing the engine to stall on a cylinder making the engine sputter or the engine is sputtering with an injector that is sticking until it get hot as it maybe...