Q: On the Downhill Assist Control system, is it supposed to be noisy while in use? 2011 Kia Sorrento

asked by on February 09, 2017

Makes chattering sound. Surprised me on my first use of system.

My car has 65000 miles.
My car has an automatic transmission.

Car is making a noise Inspection $79.99 - $89.99 Get a Quote

Hello - the Downhill Assist Control (DAC) uses engine compression (without ignition) to provide "braking" without heating up the brakes on a long descent. This makes a somewhat "unnatural" sound much like you describe from the exhaust. It is not harmful, but is perhaps a bit unsettling since it is not what you would be used. If you feel this noise is exceptionally loud, I recommend a noise inspection performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, check for any problems with the DAC system, and give you an accurate assessment of damage and cost estimate for repairs.

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

What others are asking

Dashboard is coming apart, really unsightly

There are many owner complaints that the leather covered dash has started to bubble and delaminate. However, you will most likely not see a recall as it does not present a safety issue. If you contact the dealer or manufacturer...

Power window doesn't work

If your power window is not functioning, and it is making only a faint sound, then it is possible that the regulator mechanism has become damaged or stuck, or the motor itself is no longer functioning properly. A thorough inspection...

Red lined engine by accident and now the engine idle is higher than normal. Smell something burning like rubber.

Hi there. The engine revving up higher than normal could be caused by the idle air control valve (IAC). The valve could have gotten stuck when the engine was throttled rapidly when first started. Check the IAC and see if...

car wont start.

Hello, thank you for writing in. Low or no compression in the cylinders can be cause by several issues. If the starter is turning too slowly, the air is able to escape through the gaps in the piston rings, and...

Traction control light light/reduced power message. Engine light stays on when car turned off/on, but traction control will clear

Hi there. The P2135 OBD-II error code indicates that the Power Control Module (PCM) has detected an erroneous reading regarding the voltages transmitted by throttle position sensor A or B, the accelerator pedal position sensor and or the actual throttle...

My VDC light came on the other day while snowing and has not went off even while driving on dry road

VDC, or Vehicle Dynamic Control, is Nissan's proprietary system to maximize traction and help stabilize the vehicle during cornering if the car turns more or less than desired. VDC also assists you in maintaining traction while accelerating on loose or...

Clutch sticking to floor

It does sound like you have a hydraulic problem. First, I would check for external leaks. If none are found, the problem could be air in the system. This could be the result of not bleeding the system properly after...

The back of my car seems unstable when driving on uneven roads.

You should have the vehicles suspension system inspected. Often, a broken trailing or control arm in the rear may render the vehicle unstable at higher speeds. Also look into rear shocks and stabilizer links. Consider hiring an experienced technician like...

Check engine light on flashes five times stays on

Hi there. If the same code is returning, check to see if the new pig tail is installed correctly. If the wires aren't in the right position, you will have the concern you're experiencing as it could be shorting the...

Related articles

The Best Used Cars to Buy If You're in a Wheelchair
Being Being in a wheelchair means you have a very specific list of demands, and requests for your vehicle. The main focus is of course how you will get in and out of the vehicle. There are some other aspects...
A Buyer’s Guide to the 2011 Lincoln Town Car
2011 2011 marked the final year for Lincoln’s aging Town Car. It offered an immense amount of space in the front and the rear, as well as the iconic style for which the line was known. Key Features Perhaps...
A Buyer’s Guide to the 2012 Kia Optima
Kia Kia hasn’t always had the best reputation. In fact, for years the Korean automaker was known for making cheap vehicles that didn’t last. Today, though, that reputation has drastically changed, thanks in large part to the 2012 Kia Optima....