Skip the auto shop - Our mechanics make house calls

Q: Car won't start and the cd player ejected a cd without me touching it. What's going on?

asked by on

Hello, this morning when I got to work I tried to crank my car and it wouldn't turn over. When I tried to crank it again the cd player ejected a cd, the time went to 00:00. Right now on the display it says battery saver active, service power steering, and service battery charging system. The check engine light is on and a little red battery light is on. Right now I have 10.1 volts and it usually holds around that. A guy put a box on it and when he did it went up to around 12 but still couldn't crank. What do you think it could be?

My car has 30327 miles.
My car has an automatic transmission.

A: Hi and thanks for contacting Your Mechanic....

Hi and thanks for contacting Your Mechanic. You had mentioned that your battery had 10.1 volts at the time and said that is what the battery usually has. A fully charged battery will have 12.6 volts, a 75% charged battery will have 12.4 volts, a 50% charged battery will have 12.2 volts, and a 25 % charged battery will have 12.0 volts. Any thing under 12.0 volts is considered a dead battery (a battery without a charge). This will cause lots of problems with the vehicle. The computer in vehicles of 2009 and newer require a minimum of 11.5 volts to make the computer function. A computer will keep its memory with a minimum of 9.6 volts, but it will not function. I recommend replacing charging the battery to a full charge and rechecking your symptoms that are occurring. Now, if the vehicle was driven around with a low charged battery, it is possible that the battery could have a bad burned cell which will cause the battery to drain back down fast. In this case, the battery should be replaced. Check the alternator for operation when the engine is running and see if there is a voltage of 13.5 to 14.7. Then turn on the head lights with the brights on and operate all of the windows at the same time. Check to see if the lights dim out. If the lights dim out, then the alternator may not be producing enough amperage and it may need to be replaced. If you need further assistance troubleshooting your vehicle, then seek out a technician, such as one from Your Mechanic, that can assist you with your low voltage battery and electrical issue within the cab.

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: Hello...I have a 2004 infinity m45. Everytime I started my car it jerked so I took it to a mechanic and I was told my camshaft sensor harness was bad.

Hi there. Anytime the battery is not disconnected and a wiring harness is removed, there is spikes of power that is sent directly to the ECM (computer). Either there is a plug that is not plugged in on your engine...

Q: Detecting strong gas smell.

The EVAP system is used to prevent fuel vapors from escaping into the atmosphere. The powertrain control module (PCM) monitors this system to ensure it is completely sealed. If a leak is detected, the PCM will illuminate the check engine...

Q: Car will not crank

This may potentially be related to a faulty starter relay. This is a unit that directs power from the battery to the starter solenoid which then engages the starter when you turn the key. When this is not working properly,...

Related articles

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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.