PDA

View Full Version : Can check engine light be battery related?


Armbar4U
07-19-2012, 07:36 AM
Hey Folks,

This is my first posting to the forrum so thanks in advance. I have an 08, 535xi which has 103k miles and original battery. Lately it's been cranking hard when starting, so I am thinking the battery is due for replacement. Recently, the check battery light appeared and I'm wondering if it's possible this might be related to a low battery condition.

The extended warranty/maintenance agreement just expired so I'm flying without a parachute now!

Any advise would be most appreciated.

Chris

bimmerfan52
07-19-2012, 10:05 AM
With BMWs anything is possible with a dying battery.

First things first - Immediately have codes pulled to see what is going on with the check engine light before you potentially damage the engine (local auto store or your repair shop can do this). Battery can be tested in the same visit. If not the battery then it could be alternator not charging the battery.

If you see no codes, replace the battery and the check engine light stays off you are done.

Drive conservative and as little as possible until you find out what is causing the warning light.

2chill
07-19-2012, 10:23 AM
Hey Folks,

This is my first posting to the forrum so thanks in advance. I have an 08, 535xi which has 103k miles and original battery. Lately it's been cranking hard when starting, so I am thinking the battery is due for replacement. Recently, the check battery light appeared and I'm wondering if it's possible this might be related to a low battery condition.

The extended warranty/maintenance agreement just expired so I'm flying without a parachute now!

Any advise would be most appreciated.

Chris
When you say "Cranking hard" what do you mean? Long cranking to turn over or slow cranking? I just replaced the battery in my car. I had no check engine light or slow cranking. What I did notice was my clock was loosing time, about 3 minutes every day and my dash lights started dimming in and out while driving. The dealer said the clock loosing time is the first indication the battery is on the way out. Then one night I went out to clean up my trunk, but never started the car. The trunk light was on for about an hour. The next morning I go out to start the car and the battery is dead. I jumped it with my wife's car and immediately took it to BMW. They tested the battery, said it was bad and would be about $625.00 to replace or about $750.00 to replace with an updated AGM battery. I said "See Ya!" I wasn't charged since BMW had to do the battery cable recall work anyway. I then went to a BMW specialist indy and had an AGM Bosch battery installed for $275. With registration, bill came out to $345. I paid with cash and tax not collected. I have 76K miles on my car now. Bottom line: If you really do need a battery, don't let BMW rip you off.

Armbar4U
07-19-2012, 10:37 AM
When you say "Cranking hard" what do you mean? Long cranking to turn over or slow cranking? I just replaced the battery in my car. I had no check engine light or slow cranking. What I did notice was my clock was loosing time, about 3 minutes every day and my dash lights started dimming in and out while driving. The dealer said the clock loosing time is the first indication the battery is on the way out. Then one night I went out to clean up my trunk, but never started the car. The trunk light was on for about an hour. The next morning I go out to start the car and the battery is dead. I jumped it with my wife's car and immediately took it to BMW. They tested the battery, said it was bad and would be about $625.00 to replace or about $750.00 to replace with an updated AGM battery. I said "See Ya!" I wasn't charged since BMW had to do the battery cable recall work anyway. I then went to a BMW specialist indy and had an AGM Bosch battery installed for $275. With registration, bill came out to $345. I paid with cash and tax not collected. I have 76K miles on my car now. Bottom line: If you really do need a battery, don't let BMW rip you off.

Thanks for the reply. It's taking much longer for the battery to turn the engine over, as opposed to the slow "dead battery" symptom. Given the original battery is ~6 years old, I figured it was on it's way toward replacement anyway. It went from doing this every 10 to 12 times I started the car, to now doing it every 3-4 times the car is started.

Gilgorm
07-19-2012, 12:56 PM
WOW, a 4-5 year old battery. Hard to imagine. You probably need a need a new battery but a CEL wouldn't normally turn on unless the alternator was acting up as well.
Are there any other electrical gremlins popping up; ABS, DTC or the usual time /date reset? They are all indicative of a dying battery.
I would change the battery first and see how it goes. The CEL could just be an electrical gremlin.