Skip the auto shop - Our mechanics make house calls

Q: Issue

asked by on

Was driving down the road truck to shut off just like you turned off the key. Replaced crank sensor now the vehicle will start then immediately die. Sometimes it won't even start just won't turn over. Also seems like the battery is draining very quickly since this issue started.

My car has 250000 miles.
My car has an automatic transmission.

A: It sounds as if you have multiple problems....

It sounds as if you have multiple problems. I would begin by charging the battery and keep the charger on it until you get the truck to run.

If the truck died and there were not any lights illuminated on the dash, then you should be looking for a blown fuse or fuses. There are multiple fuses that supply power to the dash and the PCM. If the dash lights are on, then you will need to perform a more comprehensive diagnosis.

To diagnose the dying problem, you should check fuel pressure, injector pulse, spark, and watch scan data for crankshaft and camshaft sensor signals. With these tests you will find out what is missing and you can continue your diagnostic direction from there. Once you get the truck running, you should check the charging system by monitoring system voltage at the battery and amperage from the alternator. This is best done with a carbon pile.

If the battery is draining very quickly, you need to test this with a amp meter. Most multimeters won’t carry over ten amps, so you will need what is known as an amp clamp.

You don’t need to buy one as expensive as this. If you do indeed have a draw on the battery, with the amp clamp around a battery cable, begin pulling fuses one at a time. If when you pull a fuse the draw goes away, you have found the circuit that is pulling current from the battery. Be sure to put each fuse back in before moving onto the next one. Good luck.

I’f you feel like you need some assistance with this, contact a certified mechanic who is capable of diagnosing your starting problem as well as the battery battery issues. One this is done, the proper repairs can be made in order to get your car running normally again.

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: 2009 gmc acadia..car starts but when you put it in drive it cuts off

Hello, thank you for writing in. To begin, there are several recalls and issues known to happen with the Acadia within your year range. If you have not already looked up your VIN to see if your vehicle was part...

Q: Horn and brake lights not working

Hello. The issues you are having are likely being caused by two separate things, but it is possible that shorted wiring is affecting both. A technician can examine the brake pedal switch, and also test the voltage coming to the...

Q: Why does car start when MAF sensor is cleaned with spray even after being disconnected

The MAF sensor may be not reading the correct altitude you are at and may see 10,000 ft when you are less than 500 feet. When you disconnect it the computer uses a set look up table stored in memory...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...