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Ask Juan Crespo Your Own Question
Juan Crespo
Juan Crespo, ASE Certified Technician
Category: Chevy
Satisfied Customers: 1526
Experience:  A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
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2004 Malibu maxx. Ran yesterday no issues. Interstate

Customer Question

Customer: ***** *****. 2004 Malibu maxx. Ran yesterday no issues. Interstate battery new 12/14. Today, no electric at all when ignition switch turned (no dash, no lights, nothing). Put charger on it....electric wakes up. Fault code P1518 comes up on meter (maybe false because of power situation??). Does this point at anything besides battery??
JA: Thanks. Can you give me any more details about your issue?
Customer: What kind of details.
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Customer: Ya, no rush....AAA is on the way and they will confirm the battery...just not a patient person :)
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Submitted: 1 year ago.
Category: Chevy
Expert:  Juan Crespo replied 1 year ago.

Hi there. Welcome to our site!

I agree with you on P1518 probably being caused by lack of electrical power.

I suggest recharging the battery so it reads a full 12.6 volts after after a load test. Start the engine and rev it to 2000 RPM. Turn on hi beams and A/C. Then measure voltage across battery negative post and alternator pole (where the big Red wire goes). Record that voltage and then measure across battery positive post and engine block. Both voltages should be above 13. If not, there is a charging system problem that needs further diagnosis.

Please let me know if you have any other questions.

Best Regards.