Q: Q: Charging system failure.

asked by on

Battery gauge goes almost to red. Check Guage light comes on. Battery acid is coming out. Replaced alternator and battery. Still overcharging. But not all the time

My car has 306463 miles.
My car has an automatic transmission.

Hi There, You may have a failing voltage regulator that could be allowing the alternator to supply too much or too little amperage to the battery resulting in the battery never maintaining a consistent charge as it is designed to. The voltage regulator is a unit that regulates the charging of the battery by the alternator. When the voltage regulator is not working properly, this may result in the alternator allowing too much power to be delivered to the battery resulting in damaging wires and prematurely sometimes destroying the battery. A common sign of this is usually the acid inside the battery boiling causing the battery to swell or leak acid out as you have described. I would recommend having an expert from YourMechanic come to your location to diagnose and inspect your charging system.

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
  1. Home
  2. Questions
  3. Q: Charging system failure.

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: I what to watch the video about how to solve this problem of p0756 on Toyota Lexus gx470

Hi there. There is no video on the specific transmission solenoid shift, however, if you click here you can see where the solenoids are located on your transmission and how to remove them to replace them. If you need further...

Q: Loose/Wobbly steering wheel

Claimed by Andrew Quinn

Q: Q: Engine

The lack of oil could have caused excess wear on the engine main or rod bearings. That wear increases the clearances between the crankshaft and its supporting bearings in the engine block and/or increases the clearances between the connecting rods...

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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.