Q: The car idles up and down. Replaced throttle body temperature sensor, mass airflow sensor, and oxygen sensor.

asked by on

Idles up and down replaced throttle body temp sencord mass air sencor oxygen sensor

My car has 19000 miles.
My car has a manual transmission.

Hello. If you have taken all those steps and the idle is still not at the correct speed, then the next thing I would look at is the idle air control valve. The idle air control valve is the component that is responsible for setting and adjusting idle air. If it malfunctions, gets dirty, or has an issue, then it may cause a low or high idle, a fluctuating idle, or in some cases even stalling. If you would like to have this done, a certified professional from YourMechanic can come to your car’s location to diagnose the idling problem and assist with repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. The car idles up and down. Replaced throttle body temperature sensor, mass airflow sensor, and oxygen sensor.

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: Q: engine light on

Hello...What to do depends on whether the person examining the car actually tested the oxygen sensor (O2 sensor) or not. That "part", the O2 sensor, has no doubt been mentioned to you because it appeared in a list of possible...

Q: Bad alternator needs to be replaced.

The alternator is not charging if voltage drops to below about 13.2 volts while the engine is running. If your car will not go over 5 MPH you may have other issues causing this like low fuel pressure or a...

Q: 1994 Plymouth Acclaim where is the fuse to the fuel pump

Hi Ron. Thanks for contacting us today. The fuel pump relay (which supplies power to the fuel pump) is located underneath the hood, on the driver side of the engine compartment along with other relays. It's the one closest to...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...