was driving down the highway today my check engine light came on flashig, battery appeared in the center and vehicle had no power. sounded like it was missing on a couple of cylinders. could a bad battery cause this
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2004 GMC Canyon Question: mil light flashing, battery light on and no power
Answer #1DaveJHM December 27, 2010, 00:57Master
Bad batteries typically do not cause misfires. In this case, though, you have a charging system issue - as that is why the battery light comes on.
Repair the charging system issue first (alternator? wiring?....) and then recheck for the check engine light. On occasion I have seen where a faulty alternator can send off electrical frequencies locally under the hood that can hamper ignition system or computer operation. Best to eliminate this variable first, before going onto other things like plugs, etc.