Q: My car idles rough at stop lights.

asked by on

My car which is a 2008 Nissan Altima has 95K miles. It drives fine. No check engine lights on. When I'm at a red light in gear, my Rpm goes to 500 and it starts to vibrate. When I push the gas or put it in neutral it's fine. No mechanic can help me! I've been told several things from transmission is failing to nothing is wrong. Help plz.

My car has 95000 miles.
My car has an automatic transmission.

There are a couple of things that may cause this situation. A clogged engine air filter or dirty throttle body may not allow the proper amount of air to flow while the engine is idling and cause a low, rough idle. A faulted mas air flow sensor can also cause this concern as the sensor is offering false information to the engine control computer and an improper fuel volume is being sent to the engine. Consider hiring an experienced technician like one from YourMechanic who can come out for a closer look at the vehicle to offer a more personal diagnosis of your rough idle concerns.

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. My car idles rough at stop lights.

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: Hello where is a stepper motor located on a 2010 Nissan altima

Hi Jacki. Thanks for contacting us today. The Stepper Motor is a component that is found within the CVT transmission valve body. It should be replaced as a unit - not the individual unit - as it's very difficult to...

Q: Q: What does the engine coolant temperature gauge do?

You have a number of important gauges, readouts and lights on the dash. The engine coolant temperature gauge is one of the most critical. It measures the temperature of your engine’s coolant. During normal driving, it should stay in the...

Q: Q: My truck is running rough

Having a rough running vehicle is never a pleasant experience. Unfortunately there can be quite a few reasons as to why your GMC is running rough for you. With the limited information, and not being in front of the car,...

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...