Skip the auto shop - Our mechanics make house calls

Q: I have replaced the battery and alternator and the charging system light keeps popping on and then the car dies after a day or two

asked by on

I recently was driving my car and all of the indicator lights came on and when I would push on the gas I would slowly move then jerk to get to a faster speed and it became difficult to steer. Bought a new battery, and replaced the alternator. Every once in a while the charging system light (the one that looks like a battery) will come on. Sometimes it stays on for the whole day, and sometimes it says on for a few minutes going on and off during those 20-30 minutes. Then after a few days the car will die. Sometimes after it sits it will start again and last for a day or so, but continue on the same cycle mentioned above. I had the battery and alternator tested and they are fine. Talked to a service tech at a mazda dealer on the phone and he said it could be corrosion in the cables connected to the battery. Any idea if this is the problem and if not, any other ideas? Thanks

My car has 151000 miles.
My car has an automatic transmission.

A: The problems you are describing do seem to ...

The problems you are describing do seem to lead me back to the charging system circuit. If the vehicle shuts down because of a dead battery, the problem has to be in the charging system as it is designed to maintain the battery charge while the vehicle is in use. Loose battery cables or corrosion like the technician said can cause problems as well. Consider hiring the aid of one of our mobile experts for a personal diagnosis of your charging system.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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!

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: My car won't start after new alternator, starter, and battery.

Hello, thank you for writing in. With a new starter, battery, and alternator (assuming you have not drained the battery attempting to start it), the starter should attempt to crank over the engine. If the starter does not make any...

Q: How long should it take to change the thermostat on a mazda 6?

Depending on the engine you have it will take anywhere from 1.5 to 2.5 hours.

Q: Replaced alternator on car 2 times each time shows it's charging 14v let car run for a little bit then test drive and car voltage

There are reports that the replacement alternators will not communicate with the engine computer and will not charge correctly. I recommend using only the manufacturer approved replacement part. It can be new or remanufactured but approved for use in the...

Related articles

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.