Q: I'm getting a vibration and knocking either under my feet or the engine when I do 65+.

The first thing I would do is be sure the parking brake is released. As long as the parking brake is released and this issue still occurs there may be a major issue with the transmission on this vehicle. Be...

You should always use your signals when you are changing lanes, to alert drivers around you that you are doing so. You can signal a lane change with the turn signal lever, which is located on the left side of...

If the IMA light is illuminated, in many cases, the system will be shut down to some degree to prevent further failures. Have the vehicle system scanned for any fault codes stored in the computer as there are a couple...

Your car is equipped with wheel speed sensors at each of the four wheels which monitor wheel speed while relaying this information constantly to the ABS and traction control system which are controlled by the car's ECU. When the ECU...

This may be related to a faulty blower motor control module or resistor. The blower motor resistor (https://www.yourmechanic.com/services/heater-blower-motor-resistor-replacement) controls the various speeds and functions of the blower motor once it is turned on. I would recommend having an expert from...

Cylinder compression in all four cylinders should be verified. Secondary firing patterns should be scoped to get independent verification (i.e., apart from what the OBD-II system might be reporting) that indeed the problem is just in cylinder no. 2 (https://www.yourmechanic.com/article/p0302-obd-ii-trouble-code-cylinder-2-misfire-detected-by-jamahl-walker)....

Hi there. The code you listed is a Kia specific OBD-II trouble code that indicates an issue with the intake manifold, specifically 'bank one' of the intake manifold. Your engine on your Kia Optima is equipped with an intake manifold...

It sounds like you did not put the clutch linkage back in place correctly. Without seeing the vehicle it would be hard to know what is causing the problem . I suggest having a mechanic like one from YourMechanic inspect...

Oxygen sensors that are in-line after the catalytic converter (i.e., downstream sensors) should output a relatively steady voltage. The purpose of the downstream oxygen sensor is to monitor the efficiency of the converter rather than provide feedback to the the...