Skip the auto shop - Our mechanics make house calls

Q: Problem with knock sensor or coils

asked by on

My car shakes and the valve cover leaks. I think it is either the knock sensor or the coils, or both.

Hi there, many others have reported shaking during idle with the Q45 around that time. Replacing the coils has been reported to fix the issue, however there are other components that could be affecting the engine’s smoothness as well so it’s better to have the shaking issue diagnosed more thoroughly.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: When I turn off the car, power steering fluid over-flows from under the reservoir cap. 1999 Infiniti Q45

Hello - it sound like your power steering system has been over-filled with fluid, perhaps the wrong fluid was used (non-synthetic) and is foaming, or the fluid filter (in the reservoir) is clogged. I recommend a PS fluid service performed...

Q: I have a loss of power when acceleration the car does not drive pass 10 or 15mph I change the plugs and also change the fuel filte

This may be result of a failing or dirty mass airflow sensor. This is a unit that is responsible for regulating the air flow into the engine as it is mixed with fuel prior to being injected into the motor....

Q: VEHICLE ISSUES

German luxury cars built in this century are very complicated. They have multiple electronic control units for different functions, one for the engine, one for the transmission, one for the brakes and half a dozen more for various body functions....

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.