Skip the auto shop - Our mechanics make house calls

Q: Starting problems - 2004 Lexus LS430

asked by on

the car battery was low however there was enough charge to start the car then it died right away. then the juice ran out. We put the booster on the care and it started then died right away.

My car has 200000 miles.
My car has an automatic transmission.

A: Hi there. This sounds like a case of a fail...

Hi there. This sounds like a case of a failed alternator & battery duet. Many times these can fail within close time frames of each other and are usually recommended to be replaced together so that it has a new battery with a new alternator (unless one has recently been replaced).

A digital battery tester can provide data such as battery health, state of charge, cold cranking amps, and whether or not it may have a bad cell. A load tester can help determine if the alternator has failed. One of the most common things I used to look for at that Lexus dealer was a valve cover leak that had been dripping onto the alternator. Almost every time the oil leaking from the valve cover had seeped into the alternator and the result was a failed alternator.

If this is the case, the valve cover gaskets should definitely be replaced as the leaking oil will cause the new alternator to fail. If you would like to have this taken care of, YourMechanic hast professional technicians that can assist you with a diagnosis of the starting problem, and can also follow through with a battery replacement, alternator replacement, and valve cover gasket replacements services as necessary.

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: Why does my new battery keep dying?

Hi there: Some of the top reasons why your battery won't hold a charge are listed in your question. If the radio was stolen, and not repaired or replaced, it's possible that you've got a slow electrical current being drained...

Q: Fuse relay fuse

Hello, thank you for writing in. The first thing to determine when addressing a no-start situation is if the starter is working properly. The starter is responsible for cranking over the engine. It has to turn at a certain speed...

Q: Codes p0136, P0141

Although these codes are both for the downstream O2 sensor, they are completely different. The first code, P0136, has to do with actual sensor performance. The second code, P0141, has to do with the sensor heater circuit performance. The...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...