Q: Alternator belt battery light

asked by on September 14, 2016

Replaced Battey a few months ago. Now car has started idling low when I turn air on and battery light then comes on. It did this same thing a month ago and the went away. Now if I use air I have to put car in neutral and rev gas..at redlights. The belt I had car running and used that thing on engine to rev car I watched belt and it didn't squeel but obviously went fast. Didn't seem to stick or slip. The alternator has a date sticker of 2011. Thanks for help and pricing to fix my car. Carrie G Cleveland, Tn

My car has 220000 miles.
My car has an automatic transmission.

Alternator Replacement $149.30 - $1362.41 Get a Quote

It sounds like your car alternator is not charging enough at lower speeds. Have the charging system checked to make sure your alternator is working or not and replace it if not charging enough. The bad battery may have caused the alternator to burn out a diode and lower its output. If you do in fact need to replace your alternator, consider a certified technician from YourMechanic who can come to your home or office.

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

2002 sturn vue no start

Hello there, many faults will cause your 2002 Saturn Vue to crank no start. The most common causes of a crank no start are the battery, starter, battery cable, ignition switch, fuel pump, wiring harness, or fuel filter. A qualified...

Sluggish start. Bad starter or bad battery? Female. Don't want to get taken by shop.

Hi! That "sluggish starting" (slow cranking speed) is the most common symptom when a battery is at the end of its life. The age of your car is also just about in the normal range for how long batteries last....

Car chirping while idling

Hi there. A chirping sound could indicate an idler pulley is about to fail. The bearing in the pulley will start to break down and need replacing. Although it could be a different pulley going bad, I would recommend having...

Key getting stuck in ignition of a 2002 Mazda MPV

Hello. There is a safety interlock switch in the gear select linkage system. It prevents key removal if the vehicle is not in Park. If that switch is misaligned, has failed, or its connector is dirty or has failed, the...

CEL is on, due for inspection

Hi there. Believe it or not, many of these codes can be cause by a faulty O2 sensor that has been allowed to continue without repair. The fault sounds like it is definitely a failed O2 sensor, but there could...

The car stalls at low RPMs and during idling

A sticking or stuck idle air control valve can cause this condition. The valve needs to be removed and inspected for excessive carbon buildup. The valve could be cleaned and then then re-installed to see if proper operation can be...

Low idle and stalling

Hi there. This is a problem that comes up often on this engine. It is typically caused by a failing idle control valve or a dirty throttle body. If the throttle body is dirty then that will typically cause the...

Belt squealing

This is a pretty common problem for your vehicle. Your serpentine belts are likely worn out. In addition it is highly likely that you could have a bad pulley or belt tensioner. If any one of these things are a...

I just purchased a Lexus gs450h 2007 on Friday and already it says check hybrid system I got it scanned and it says battery determine.

Hi there. When the warning message comes on for the Hybrid battery, then either the battery could be low on charge or the battery may have a burned cell. I recommend seeking out a professional, such as one from Your...

Related articles

How Long Does an Alternator Belt Last?
Your Your car’s alternator is what delivers energy to your vehicle’s battery. It works by means of converting mechanical energy to electrical energy, taking power from the engine’s crankshaft and delivering it to the battery where it is stored. The...
How Do Drive and Serpentine Belts Work?
The The drive belt on your vehicle delivers power to the car’s engine, alternator, water pump, power steering pump, and air conditioner compressor. Usually, a car has one or two drive belts, and if there is only one, it is...
A Buyer's Guide to the 2012 Lexus IS
If If you haven’t heard of the 2012 Lexus IS, you’re not alone. This sports sedan is incredibly underappreciated. However, that doesn’t mean it’s not worth considering for your next car. Key Features The 2012 Lexus IS can be purchased...