Q: engine revs up and down when in park
engine revs up and down when in park and when driving
My car has 130170 miles.
My car has an automatic transmission.
Recommended Services
| Car idle is rough Inspection | $94.99 - $114.99 | Get a Quote |
The idle is controlled by the idle air control valve and if it cannot keep the engine idling it will keep trying to rev the engine up to compensate. A vacuum leak, sensor that has failed, or an EGR system malfunction could potentially be the cause of the erratic engine you’re experiencing.
A mechanic will be able to diagnose the rough idle for you and quote the needed repairs. For this vehicle, the engines are very sensitive to vacuum leaks in the intake air tube, between the mass air flow sensor and the throttle body. If the tube is cracked it will need to be replaced before anything else to see if the idle settles down.
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
How do I turn on the front passenger air bags?
The front passenger air bags will automatically turn on when an adult-sized person is detected in the passenger seat. This will be displayed by the illuminated word ON on the PASSENGER AIR BAG control on the center console. However, it...
Vehicle stalling
The most common cause of a vehicle stall would be a vacuum leak or an AC pressure switch. As for the overheating problem, this may or not be related to the stalling issue. If it is related, I would also...
Electrical problems with the car that started suddenly
If all these problems started happening at the same time then you will have to get the engine control module (ECM) (https://www.yourmechanic.com/article/what-is-a-vehicle-s-electrical-control-unit) tested to see if it is causing the problems. The ECM controls all these lights using input from...
Car won't crank unless I pull the ASCD relay
The ASCD relay is for the cruise control only and should not cause the vehicle to not crank in any way. You may need to have the relay box checked to see if you have corrosion in the connections. If...
oil inside spark plug chamber and clicking/ticking
Hello - oil is leaking from the valve cover, down into the spark plug recesses as you noticed. This causes the spark plugs to short, creating the misfire you have experienced. No doubt some of this oil leaked into the...
My s80 cranks but wont start.
Check carefully under the hood to be sure there are no air large air leaks in the intake system, such as the big boot at the throttle body or any other large vacuum hoses. Sometimes these rubber parts fail and...
Humming noise coming from my tires. Not the wheel bearings and not the shocks or tires
Wireless chassis ears (remote microphones) can be mounted at each wheel position to pinpoint the origin of the humming. Wheel bearings that have zero play (i.e., are absolutely "solid") can make a huge amount of noise if there are merely...
hearing high pitched loud whistling (NOT squealing) sound while driving up hilly neighborhood
Hi there. Generally speaking, the mechanic you contacted is correct; that's it is very hard to diagnose a sound or noise without being able to replicate the source of the noise. This is why we offer mobile mechanic services (https://www.yourmechanic.com/services/car-is-making-a-noise-inspection),...
Would a leaking exhaust manifold cause a catalytic converter code?
A leaking exhaust will cause excessive oxygen to get into the exhaust and cause the O2 sensors to detect this and will set a code for the leak. I suggest getting leak repaired and then recheck the system to see...
Related articles
A Buyer’s Guide to the 2012 Nissan Altima
While While it may not be quite as modern and sporty looking as some other models, the 2012 Nissan Altima is still a huge contender in the mid-size sedan category. With both four- and six-cylinder options and a CVT (continuously...
A Buyer’s Guide to the 2012 Nissan Frontier
When When looking for a truck, the 2012 Nissan Frontier could be the vehicle you’ve been hunting for. It has a great look, a strong engine, and it is reliable. The vehicle has been making gains on other trucks in...
The Best Used Cars to Buy If You’re a Realtor or Real Estate Agent
If If you make your living as a realtor or real estate agent, you may have a number of considerations when it comes to purchasing a used vehicle. The most common considerations are budget, ability to transport people, and comfort....
Browse other content
Maintenance
Estimates