Q: Car idling erratically

asked by on

As soon as I start my car, it idles erratically.

Hello. The erratic idling could be caused by several things: You could have a bad mass air flow sensor, the throttle position sensor could be bad, or the idle air control valve could be bad. This could also be an indication of a problem with the fuel system, or a very bad vacuum leak in the engine. I suggest you have all of these possible issues checked as soon as possible because they all could make the car idle erratically. A diagnostic test of the erratic idling would best be done by a certified technician, like one from YourMechanic.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Car idling erratically

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 car starts, it shudders before shutting off

A clogged fuel filter can cause stalling issues on a vehicle. The clogged fuel filter makes the fuel pump work harder to deliver fuel to the engine and can overheat the fuel pump. The fuel level sending unit is in...

Q: Q: How do you lock or unlock the doors from inside?

Locking the doors provides important safety. You should lock the doors before driving (even if auto-lock is enabled on your car). Not sure how to lock or unlock them from inside? Here’s what you need to know: To Lock: ...

Q: What does the High Temperature indicator mean on the dash?

Your car’s engine creates a lot of heat during operation. Coolant is cycled throughout the engine to help prevent damage from that heat. If the High Temperature indicator on the dash comes on, it means that the computer has detected...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...