Q: Car idles low

asked by on June 15, 2017

Car idles low at 500 rpms when I'm at a stop. I cleaned the throttle body but no luck. It's a very noticeable shake. 2015 corolla 28k miles. No sensor or light on. Please help!

My car has 28000 miles.
My car has an automatic transmission.

Hi there. In most cases, a low engine idle is caused by an idle control valve that is damaged, a vacuum leak or in some case, clogged fuel injectors. It is also typical for an engine idle to be low if the car’s AC is on, and has been running for a while.

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

Steering slipping

Hi there. I'm unsure of the problem you are describing. If it has to do with your steering not reacting to you turning the wheel, then you may have a problem with your rack and pinion. Also, your steering contains...

Car window dropped down into door

Hello! The most common cause of the window falling into the door is the window regulator becoming defective. The door panel must first be removed in order to inspect the pulleys and cables attached to the regulators. Usually the cables...

Tail light on after the car is off, brake lights won't work

Tail lights stay on when the car is off and your brake lights don't work at all. If lights are staying on when you turn the car off, the ignition switch turns power off to that spot. Maybe your ignition...

P0171

Hi there. This code you are getting is due to your system running lean. Most of the time, it is caused by low fuel pressure from a weak fuel pump or a clogged fuel filter. Another possible cause can be...

When slowing down and then accelerating transmission is jerky and makes a clunking noise.

It is possible that you could have faulty U-joints or a bad transmission mount causing this issue. I would recommend having your vehicle inspected by a qualified professional to determine if either one of these parts are faulty. Consider YourMechanic...

Display isn't working, says a/c isn't connected, engine just lost power- but a/c, radiator, oil, gas, intake are all connected.

That sounds frustrating. You will need to get your car scanned using a scan tool that communicates well with a Prius. This will identify the diagnostic trouble codes (DTCs) that you can use to begin your diagnosis. You can...

Jerking and high rpms

It may sound like a simple suggestion but I would recommend checking the transmission fluid level to be sure that it is within specification as a low transmission fluid level can also cause some of the issues you are experiencing....

I have a ton of white smoke from my truck when i start and run it, is that likely a head gasket problem?

Hello there, many faults will cause white smoke to be seen on startup with your 1988 Toyota Pickup. When white smoke it seen it indicates that coolant is being burned in the engine, this is not a normal operation. There...

Sour, stale smell coming from air vents

This is most likely a cabin filter that needs to be changed. Your car is equipped with an air filtration system that works similarly to your engine's air filter in that it filters the outside air as it flows into...

Related articles

Should I Buy a Honda Accord or a Toyota Camry?
The Honda Accord and Toyota Camry have been the best-selling cars for 20 years due to their quality and reliability. Find out which is best for you.
The Best Used Cars to Buy If You’re a Massage Therapist
If If you're a massage therapist, one of the cornerstones of your business has to be that you don’t keep your clients waiting. That means you need a vehicle that’s reliable. You also will have to move your gear, including...
A Buyer’s Guide to the 2012 Toyota Tundra
While While Toyota hasn’t been in the business of manufacturing larger pickup trucks as long as the likes of Ford, Chevy, and Dodge, the Tundra is most definitely a force to be reckoned with. This full-sized pickup has comparable payload,...