Why is my battery light on when I start my car and why is my check engine light blinking


Asked by Aug 22, 2014 at 03:41 PM about the 2003 Nissan Sentra SE-R Spec V

Question type: General

2 Answers


If the battery light is on while the engine is running, the battery is not being re-charged. Could be failed/weak alternator. To find out why your CEL is on get an OBD scan at a large parts house, they will give you a code P followed by four numbers. bring the codes back here or got to OBDcodes.com and look for cause and fix

3 out of 3 people think this is helpful.

PS usually a blinking CEL is indicative of a more serious fault than a steady light. I suggest getting the scan post haste

3 out of 3 people think this is helpful.

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