CEL after dead battery - Mazda 6 Forums : Mazda 6 / Mazda Atenza Forum

hypnoticblazze · 08-26-2009, 11:48 AM

So two weeks ago right before going on vacation I noted that my car was struggling to start. I knew it was the battery slowly but surely not holding too much of a charge.

Anyhow I decided to get a new one because its been 4 1/2 years wihtout a battery replacement and that is a long time on a stock battery. The day I got up to go get the new battery the start car wouldnt start. Got the normal clicking you always get when there is a dead battery on start up.

My neighbor came out with one of those portable battery charging things, and my car started up right away. However I got a CEL.

I went got the battery did a couple of errands and eventually the CEL turned off after I started the car again (before the new battery). I changed the battery the next day.

To this day the CEL hasnt come back, what do you guys think happened?

lacuna · 08-26-2009, 11:52 AM

It's hard to tell what it was without an actual code. Did you ever have it scanned? Either way if you've been driving on it with no issues, it was probably just a fluke thing.

hypnoticblazze · 08-26-2009, 11:58 AM

QUOTE (lacuna @ Aug 26 2009, 11:52 AM)

Quote:

It's hard to tell what it was without an actual code. Did you ever have it scanned? Either way if you've been driving on it with no issues, it was probably just a fluke thing.[/b]

Your right, I just figured i'd postthe issue to see if anyone else went through the same thing since I didnt have it scanned. Will that code stay registered in the computer? Or only when the CEL is on?

lacuna · 08-26-2009, 12:09 PM

I am fairly sure that our ECU stores previous codes.

wngnt · 10-26-2009, 11:57 AM

Just did a search for 'cel' and ran across this thread while looking for this exact issue. I had to boost my 2005 wagon this morning (from my wife's M3) because of a low battery. Positive terminal connector was really loose and I'm supposing that the battery just wasn't being charged correctly. The car jump started fine but I now have the CEL on. Its likely time for a new battery anyway and I'm going to ignore the CEL for now since it probably is because of the jump start (I hope).

08-26-2009, 11:48 AM	#1 (permalink)
hypnoticblazze Track Racer Join Date: Oct 2006 Location: Long Island, NY Posts: 523 Thanks: 0 Thanked 0 Times in 0 Posts Groans: 0 Groaned at 0 Times in 0 Posts iTrader: 0 reviews	So two weeks ago right before going on vacation I noted that my car was struggling to start. I knew it was the battery slowly but surely not holding too much of a charge. Anyhow I decided to get a new one because its been 4 1/2 years wihtout a battery replacement and that is a long time on a stock battery. The day I got up to go get the new battery the start car wouldnt start. Got the normal clicking you always get when there is a dead battery on start up. My neighbor came out with one of those portable battery charging things, and my car started up right away. However I got a CEL. I went got the battery did a couple of errands and eventually the CEL turned off after I started the car again (before the new battery). I changed the battery the next day. To this day the CEL hasnt come back, what do you guys think happened? __________________ 2005 Onxy Black 6s Fujita F5 CAI // Optimized TB // Magnaflow cat-back // 6000k Apexcone 35w HID's in low beams (with glare mod) and integrated fog lights // Piaa clear 194's // Sirius Sporter 5 // Tenzo R's Passion 5 18X7.5 // 225 40 Falken Ziex ZE912 // LED tails // 15% tint all around

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08-26-2009, 11:52 AM	#2 (permalink)
lacuna Track Racer Join Date: Aug 2004 Location: Codumbass Oh Posts: 521 Thanks: 0 Thanked 0 Times in 0 Posts Groans: 0 Groaned at 0 Times in 0 Posts iTrader: 0 reviews	It's hard to tell what it was without an actual code. Did you ever have it scanned? Either way if you've been driving on it with no issues, it was probably just a fluke thing.

08-26-2009, 12:09 PM	#4 (permalink)
lacuna Track Racer Join Date: Aug 2004 Location: Codumbass Oh Posts: 521 Thanks: 0 Thanked 0 Times in 0 Posts Groans: 0 Groaned at 0 Times in 0 Posts iTrader: 0 reviews	I am fairly sure that our ECU stores previous codes.

10-26-2009, 11:57 AM	#5 (permalink)
wngnt Learners License Join Date: Feb 2008 Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts Groans: 0 Groaned at 0 Times in 0 Posts iTrader: 0 reviews	Just did a search for 'cel' and ran across this thread while looking for this exact issue. I had to boost my 2005 wagon this morning (from my wife's M3) because of a low battery. Positive terminal connector was really loose and I'm supposing that the battery just wasn't being charged correctly. The car jump started fine but I now have the CEL on. Its likely time for a new battery anyway and I'm going to ignore the CEL for now since it probably is because of the jump start (I hope).