Q: All lights are on; on the dashboard and the battery continues to die.

asked by on January 05, 2017

I have replaced the alternator, battery, positive battery terminal, and the fuse box that connects it all together. My battery voltage doesn't get high enough to run more than 3-5 minutes when being driven. Will last a minute or so when it idles. Everything is new but it still drains the battery. I got a blue driver to do a reading and it showed P0700 which is dealing with the transmission. Should i replace the Output Speed Sensor now? Or what, because i need my vehicle so I can work. I also read somewhere that i would have to flush my transmission fluid because it could be dirty. I don't have any problem shifting until it starts to die. My cruise control has never worked since i bought the vehicle 6 months ago. The R.Diff Temp started to show every once in a while after i bought brand new tires to put on my truck so he changed the oil. He has also cleaned the MAF a few months ago. I need some serious help before i sue somebody! HELP ME:-(

My car has 156000 miles.
My car has an automatic transmission.

Car is stalling Inspection $94.99 - $114.99 Get a Quote

Hello. The first thing to consider is that amount of work that has already gone into the vehicle. With the lowering of the battery’s power so quickly after starting, I have a strong prediction that the alternator/charging system is not functioning correctly. The battery is responsible for starting the vehicle, and it completes the charging system circuit. Once the vehicle is started, the alternator supplies the power to the vehicle. The code and check engine light is likely a result of the more predominant issue at hand. Without a power supply and properly functioning engine, the transmission and its control module will not function correctly either. With all of that being said, you need to inspect the charging system in entirety, or get a second opinion. While it should not be your first assumption, it is possible to purchase or receive a faulty replacement component. You can have the new alternator, battery, and fuse box tested. However it is most likely the alternator or its immediate circuitry. For more help resolving the issue, contact our service department to schedule an appointment.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Brake lights not working properly.
When all the brake lights quit working, the most likely cause is the brake light switch. This switch activates the brake lights when the brake pedal is depressed. It is usually located on the brake pedal mechanism. Have this switch...
Should I buy this 1997 BMW 528I
Hello. BMW makes a fantastic vehicle that, as you know is well known for its performance and luxury. With that comes a little more of a price tag in terms of maintenance and upkeep as with any performance or luxury...
I jus recently gotten a new battery inserted in my car now my car is not starting without it cutting off.
This is your anti-theft system (https://www.yourmechanic.com/article/how-to-disable-a-car-alarm) taking over as a result of the new battery being installed. This is unfortunately something that usually requires the dealer to reset due to safety precautions. Often times you will need to establish some...
I can't figure out why there's a leak coming out of the coolant reservoir tank
Hi there. Check the radiator cap to see if it is sealing. Put a pressure tester on the radiator cap and pump it up till the pressure spits out, then let it sit. If the pressure drops down, then the...
How many engine mounts are in a 2006 Toyota RAV4?
Since the engine and transmission is suspended together, you have to consider the combined unit. There are 4 total engine & transmission mounts that should be considered. If engine torque tears any of the mounts, the other mounts are strained,...
Transmission shudders when accelerating from a stop
This may be related to a faulty transmission control solenoid (https://www.yourmechanic.com/services/downshift-solenoid-replacement) or low transmission fluid. As you may know, automatic transmissions use pressurized hydraulic fluid to change gears. When a gear change is required, the car's computer activates a transmission...
Reduced Engine Power
Hello, thank you for writing in. With the car seeming to have issues with the extreme cold weather, there may not be anything technically wrong with it. It is not uncommon for vehicles to struggle with this. You may want...
2000 Toyota 4runner-both oxygen sensor replacement
If you input your year, make and model, as well as location (zip code) at YourMechanic's oxygen sensor replacement service page (https://www.yourmechanic.com/services/oxygen-sensor-replacement), the exact written quote you desire will be provided. Generally, after about 100,000 miles of use, it's not...

Related articles

P0254 OBD-II Trouble Code: Injection Pump Fuel Metering Control “A” High (Cam/Rotor/Injector)
The The P0254 Trouble Code indicates issues with the inject pump fuel metering control “A” high (cam/rotor/injector). What the P0254 code means When this code appears, it means that the powertrain control module has found an issue with the signal...
P0376 OBD-II Trouble Code: Timing Reference High Resolution Signal B Too Many Pulses
P0376 code means there is an irregularity with the high resolution timing reference signal coming from the PCM requiring urgent attention.
P2779 OBD-II Trouble Code: Downshift Switch Circuit Range/Performance
P2779 means a problem with the downshift switch circuit usually caused by liquid that has spilled on the switch or other electrical issues.