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Old 13 Oct 2007, 11:03 am
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Default How long should I leave the negative battery cable disconected to reset the ecm engine

light.1996 honda accord
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Old 13 Oct 2007, 11:06 am
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at least 5 minutes sir
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Old 13 Oct 2007, 11:10 am
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See the reference below for the full article this excerpt is from:Q: Will disconnecting the battery reset the "Check Engine" light?A: Disconnecting the battery might reset the check engine light on some cars. However, instead of doing so, I'd recommend to bring your car to a dealer or a mechanic for proper diagnostic, and here is why:- not all cars will clear the code after disconnecting the battery- often, the problem may be actually covered by the warranty and repaired free of charge by your dealer. For example, if you have the code P0420 - Catalyst System Efficiency Below Threshold it's very possible that your catalytic converter is still covered by the original emission warranty and might be replaced free of charge (would cost you close to $1000 otherwise). - some problems, if not repaired in time may cause a serious damage and more costly repair. - disconnecting the battery will cause basic settings of the vehicle's computer to be erased (e.g. idle settings, fuel trim settings, transmission shift points, etc.) - the Readiness code will be erased, which may prevent your car from completing an emissions test. (Readiness code is an indication that certain emission control components of your car have been self-tested)- the radio, if code-protected, may be locked after disconnecting the battery - the "check engine" light will come back anyway if the problem still exist.































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Old 13 Oct 2007, 11:12 am
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10 to 15 minutes
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Old 13 Oct 2007, 11:16 am
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disconnect both terminals and touch them together for 10 seconds
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Old 13 Oct 2007, 11:18 am
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Under the hood in the engine fuse box, you will see a black 7.5 amp fuse that will be labeled ecu backup, or memory etc. Simply take it out and put in back in.
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Old 13 Oct 2007, 11:21 am
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10 mins would be the key lol
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