Question about 2003 Oldsmobile Alero
Check engine light blinks and check charge system on display
PO 300 codes are cylinder misfires
The 3 at the end of 303 is cylinder nunber 3
On some vehicle systems when a MIL Lamp flashes
it indicates that the misfire is so bad that it could damage
the exhaust converter
So you should not use it until you have it diagnosed
Won't be a spark plug issue
It is an ignition coil problem,but why
you need to find out.
Posted on Jun 09, 2012
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Posted on Jan 02, 2017
Take it to a auto parts store they,ll test it for free and can probaly tell you exactly whats wrong.Probably a sensor or something.
Posted on Oct 16, 2009
The alternator is most likely the problem, it isn't putting out enough of amps to charge the battery, but enough to keep it going which won't last long. Before assuming the battery or alternator, try your battery connections for corrosion or tightness. If you live close to an auto parts store they can check the battery and alternator to see which is the problem. The battery will not hold up long if running lights at night or other power consuming things.
Posted on May 01, 2010
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