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.
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
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.
SOURCE: fob will not unlock/lock doors 2007 dodge ram,
fob broken or bad, or fob battery bad, key problem not reading key code
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.
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.
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