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seattlefly Posted on Jan 06, 2014

2007 Mazda cx-7 battery completely dead the engine starts on and off

My 2007 Mazda cx-7, I replaced battery at the beginning of last year. There were few times when I insert the key and start the engine, I lose entire power. No lights come on and completely dead. Wait for few hours and then it wake itself up meaning I can see blinking lights (security light) and I crank the engine and it starts up. When it starts, I have to reset like I just changed the battery. Anyone had/has similar issue? I also have check for engine light saying my camshaft is misaligned. How can this be? When I changed oils every 3000-5000 miles.

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Darren Jones

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  • Contributor 41 Answers
  • Posted on Jan 07, 2014
 Darren Jones
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Sounds like a bad power connection either on positive or negative side of battery. Could also be a bad connection from the fuseable links of fuse box in engine bay. Camshaft misaligned code is more likely on these models with the L3 engine a stretched timing chain issue. Very common but Mazda wont admit to it. Cheers

5 Related Answers

Anonymous

  • 152 Answers
  • Posted on Jan 02, 2009

SOURCE: OIL SENSOR LIGHT FLASHING

in some newer cars, they have light that blink like this to tell you that you need an oil change. they are just set on a timer to go off every 3500-5500 miles or it could be a malfuctioning oil pressure sensor. either way its a eawsy fix. take the car to a oil change shop to have them verify which one.

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Anonymous

  • 26 Answers
  • Posted on Jan 14, 2009

SOURCE: fob will not unlock/lock doors 2007 dodge ram,

fob broken or bad, or fob battery bad, key problem not reading key code

Anonymous

  • 1 Answer
  • Posted on Apr 24, 2009

SOURCE: 2007 yukon xl battery dead recharged battery will

We had the same issue with our 2007 Yukon Denali XL. Died on us twice after sitting for short periods of time; once we watched a DVD with the engine off and battery died within 10 minutes. The dealership kept it overnight to troubleshoot why the battery died so quickly. They said the radio was "pulling" too much from the battery. (They supposably fixed it) But again a few days later the battery died again after sitting overnight. We brought it back to the dealership and they brought in a GMC "expert" to replace the entire DVD/CD/Navigation system. They also replaced our battery with a much larger battery, similar to the ones that GMC puts in there diesel trucks. They had our Denali for 5 days, but it appears to be fixed now.
Getting it fixed correctly wasn't without headaches, but it was all covered under warranty, including the battery. And they are updating the nav w/ the new edition disc as well for no charge.

Anonymous

  • 24 Answers
  • Posted on May 30, 2009

SOURCE: Aztek won't start,key locked in ignition, service engine light on

It is the security chips in the keys. Has this car been wrecked? Was this car made in Mexico? GM had the bright Idea of creating a security system that would do exactly this, I know on cars made in Mexico (like the HHR) You can reset the power and get the key back out, but vehicle will have to be reprogrammed with the master key. This involves turning the key from off to run position without ever going past run (i.e. start position) leave key in this position for 30 minutes. Turn key back to off for 30 seconds then back to run for 30 minutes. repeat this step three times. the last time, after 3rd 30 minute period, turn key off for 30 seconds and then try to crank. Please note this only works if the original master key is being used. You can then reprogram the second key following a similar sequence, only master key that is working has to be inserted to let alarm system know that vehicle is not being stolen only that you are trying to reprogram a key. If original master key is not being used then vehicle has to be taken to the GM dealership to program keys and possible key module replacement.

Anonymous

  • 90 Answers
  • Posted on May 31, 2009

SOURCE: Loses power and starts chugging

i think its your computer. but first chek your alternator

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0helpful
1answer

I just replaced the battery in my 2007 Mazda CX7. The only thing working is the wipers. Nothing else is getting power and there's no lights on the dash. Any suggestions as to what may be wrong?

My first thought is did the wiper work before you changed the battery.
The fact your windshield wipers work and nothing else makes it a headscratcher.
I think you will have to do the basics
Make sure your battery is good, Positive cables are good and negative to ground cables are good. If you have no power to fuse box or any fuses you could have bad battery cables or grounds.
I put a few links and the last one is a video.
Below I have owners manual with fuse box diagram, fuse box diagram for 09-12, electrical manual and video with some basic electrical checks. I think you need to start checking at the battery and work out from there to find where the power is lost.

https://www.mazdausa.com/siteassets/pdf/owners-optimized/2007/cx7/2007-cx-7-owners-manual.pdf

https://www.carknowledge.info/mazda-cx-7-2009-2012-fuse-box-diagram/

http://www.cheavens.com/Mazda/CX-7/CX-7%20WD.pdf

https://www.youtube.com/watch?v=DfLyh43iihM
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My 2010 Mazda CX& has been sitting for 1 year and a half I replaced the battery lights go on but no sound of turning over? no tiock nothing...please help

Could be the security system is preventing the engine from cranking/starting.

I suggest you read the vehicle handbook to discover more about this.
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2007 Mazda CX-7 eats batteries. I've only owned this car a couple of years & have had the battery replaced 3x's. Also a new alternator.

hi i'm a part time mechanic
I use few manuals for help in self repairing, so you can try this link I've attached..
you'll get a lot of information here
Hope this helps

https://big-manuals.com/products/mazda-cx7-cx-7-2007-2009-workshop-service-repair-manual

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2007 Mazda CX7. I need torque specs for it.

The torque the engine produces, or a bolt torque?

year make model engine torque
year make model (the part) torque specs

https://www.google.com/search?q=2007+mazda+cx7+engine+torque+specs

..
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Does Low Oil Pressure=new engine?

Your oil pressure should be between 10 and 20 psi. And if it is low or you don't have Amy oil pressure change the pump. But no you don't need a new engine if you fix the problem in time
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My 2007 Mazda cx-7 completely dead for no reason on and off

hi
cam shaft sensor got nothing to do with your oil change.
Cam runs on your timing belt. it's a possibility that it may be faulty as its only a sensor.
change the sensor
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How do i know if my battery is going out

I assume you are talking about the lead-acid starting battery here.

1) The battery voltage at rest will read less than 12.5 volts.
2) With the headlights turned on try starting the car. If they dim considerably when cranking then the battery is likely almost useless.
3) When cranking the car the engine will sound as if it is being turned very slowly.
4) When almost completely dead the engine won't crank when starting and you may hear a clicking sound under the hood/bonnet.
5) When completely dead, even the dashboard lights will not illuminate with the side-lights turned on.
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I have a 2007 Mazda CX-7. It has been driving just fine (after a timing chain replacement and a turbo replacement in. The last 7 months. Last night (Friday) my check engine light came on. The guy at...

Here's what it says Heather,
  • The crankshaft position sensor identifies position of the crankshaft to the ignition control module (ICM), engine control module (ECM) or powertrain control module (PCM)
  • When not replaced, vehicle could experience no- or hard start, long crank time, misfire, lack of power, excessive hydrocarbons in oil, spark plug fouling, catalytic converter failure, poor fuel economy, CEL/MIL illumination or intermittent shutdown.I would say,go for it.
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