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L4-2.0L Turbo

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My mercedes c300 says collision prevention assist plus inoperative
The warning light means there is an electrical malfunction in the collision avoidance system and that could involve sensors, wiring, the control computer and so forth. Anybody who fixes it (whether you, a Mechanic, etc.) has to have in hand...
Question
why is my car only misfiring when I accelerate, what can be the problem?
The problem may be a fuel delivery problem like clogged injectors. Have the fuel pressure checked and filter replaced and see if this helps? Replace the plugs and wires as needed.
Question
i am buying a catless downpipe for my cadillac ats 2.o t awd. will this set off any check engine lights
If you remove the catalytic converter, the check engine light will turn on and it will turn on even if you retain the downstream oxygen sensor that is on your car. Under almost all circumstances, Federal EPA requirements do not...
Question
Low rpms at idle and vibration, car running sluggish
Hi there. Thanks for contacting us today. The problem with trying to diagnose that is inconsistent like you've described is that it's incredibly difficult because, in all honesty, nothing is likely "broken". It's more than possible that a few components...
Question
I am currently looking at a 2015 Audi A4 is there any way someone could come inspect it before I buy.
Inspection service is available in Hillside, NJ. To request an inspection, please schedule via YourMechanic's pre-purchase vehicle inspection service page. An inspection of the specific vehicle you want to purchase, carried out by a certified Mechanic, dispatched to your location,...
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Took my car to the only VW dealership in my town to get inspected. Was told to come pick my car back up as they did not have time
The N80 valve is a "purge valve" located on top of the engine. It is a very simple component in the EVAP system and indeed you can easily replace it yourself. The only way to ensure that the N80 valve...
Question
Worries about maintaining a german car rather than Japanese
Hello. I would say care cost of a European built vehicle versus an Asian built vehicle is about 20 - 30%. The Asian manufactured parts can be cheaper because they are generally more mass-produced but the European Parts can be...
Question
Windshield wipers not working
Hello. The first thing to check with any electrical device is to check the fuse. If the fuse is blown, replace it and try the wipers again. If the wipers work, then you are set to go. If it blows...
Question
Where is the camshaft position sensor located on a 2011 Kia Optima EX GDI
Hi there - the camshaft position sensor is located on the drive-side end of the top of the engine on your vehicle. It is a round black plastic housing - golf-ball size - attached to the engine with one bolt,...
Question
Where is the camshaft position sensor be located on a 2011 Kia Optima EX GDI?
Hello - the camshaft position sensor is located on the drive-side end of the top of the engine on your vehicle. It is a round black plastic housing - golf-ball size - attached to the engine with one bolt, and...
Question
Timing belt broke
Hello. It sounds like you have interference motor that will need to be replaced. An interference motor is one that has very tight valve clearance between the cylinder head and the engine piston. If the timing belt breaks in this...
Question
timing
Your engine is an interference engine which means that if you turn the crankshaft and/or camshafts independently of one another, with the timing chain removed, the valves will interfere with the pistons causing the valve stems to bend. The timing...
Question
Temperature Gauge
With most any other vehicle, your diagnosis would be dead on, congratulations! In your case, the problem is most likely the thermostat. With this Audi engine, the Audi engineers were more clever, there is only a single coolant temperature sensor,...
Question
Scraping noise
Sometimes its easy to get the hardware in a little crooked when changing brake pads, that or a backing plate might have gotten bent. Take the car back to the guy who did your brakes, they should be happy to...
Question
Rough idle and RPM fluctuation
This may be a sign of a faulty MAP sensor. The Manifold Absolute Pressure (MAP) sensor senses engine load and generates a signal that is proportional to the amount of vacuum in the intake manifold. The engine computer then uses...
Question
Parasitic battery drain
I would ask for help from one of the mechanics at YourMechanic. They have the diagnostic equipment and skill necessary to diagnose your parasitic battery drain, and fix the problem.
Question
Over heating
If you have really found evidence of cooling system blockage(s), then your continued overheating could simply be due to the fact that not all blockages are yet removed. Also, you could have multiple faults, that is blockages plus perhaps a...
Question
my car won't start
This can happen for a wide variety of reasons. Unfortunately, without additional detail this cannot be diagnosed properly without inspecting the car. I would recommend having a certified expert, such as one from YourMechanic, come to your home to diagnose...
Question
My car is overheating.
Sometimes when the water has been drained out of the engine it will take a while to get the air trapped out of the system. You will need to do the following things. First, I would take the upper radiator...
Question
My car is idling very rough.
The idle air control valve is common for causing a rough idle in many cars, but it sounds like you have already corrected that. Another thing you may also want to check is the crankshaft position sensor. A crankshaft position...

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