Question about 2002 Hyundai Santa Fe

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Battery light, brake light and airbag indicator lights on the dash are coming on. Any idea as to what might be the problem?

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  • CAROL
    CAROL Jan 12, 2014

    Did you find a solution. This just started in my 2002 Santa Fe

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  • 149 Answers

Replace the alternator.the batt light and brake light are on the same circuit, and the air bag ecu is seeing low voltage, intermit alt failure

Posted on Oct 08, 2009

  • CAROL
    CAROL Jan 12, 2014

    Battery and alternator check out fine

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The most probable reason for the code is the battery being dead for a while, there is a capacitor in the airbag circuit to make sure the airbag can go off in a collision even if the battery disconnects itself in the process. There is a slim chance it might be something else but either way the shop should be able to tell you what the problem is, and get it fixed; sometimes, scanner reader could helpfull to know exactly what fault code is stored there. keep in mind that this isnt an OBD codes reader, this is more specific for Airbag Systems.

Also, isnt rare to know that the airbag warning light is indicating the airbag(s) may not be functionig. As it says in the manual, "Ignoring the AIRBAG warning light in your instrument panel could mean you won't have the airbags to protect you, (or your passangers), in a collision...have the airbag system checked right away". Always wear your seatbelt. On 2004 there is a light on the passanger grab bar that indicates the passanger airbag is off. This happens when a child is in the seat to protect the child from the sudden force of an airbag. It can also be fooled by a package or briefcase on the seat. This is normal. When an adult sits on the passanger side the light should go off. This information was an addition to the 2004 manual.

Check THIS ARTICLE for additional details.

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START THE CAR, CHECK VOLTAGE AT BATTERY WHILE RUNNING AT HIGH IDLE. VOLTAGE SHOULD BE SOMEWHERE BETWEEN 13.80 TO 14.80 OVER 14 IS BETTER. IF THAT IS OK THERE MAY BE A BATTERY DRAIN. TO CHECK FOR A DRAIN, TURN OFF ALL SWITCHES, CLOSE ALL DOORS , INCLUDING GLOVE COMP. DISCONNECT NEG. BATT. CABLE, PUT 12 VOLT CIRCUIT TESTER ONE END ON NEG. BATT TERM. THE OTHER END ON THE NEG CABLE. IF THE LIGHT COMES ON THERE IS A DRAIN. NO LIGHT - NO DRAIN. IF NO DRAIN HAVE THE BATTERY TESTED AT A CERTIFIED ELECTRICAL SHOP

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