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2003 Chrysler Town & Country Question: Disconnect bcm to get better mileage?

 

Question

hangupz, Stuart, FL, November 07, 2009, 06:26
 Rookie

A mechanic told me if I disconnect the negative battery cable for 15-30 minutes the bcm will re-set and I should get improved gas mileage. Would this cause any problems?

SORRY, shouldn't have said bcm. Could it be ECM or PCM?

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  • Answer #1

    Bret Bodas from RepairPal Test Shop, November 07, 2009, 06:58
     Master

    I would like to know what the thinking is behind this. If you are getting poor mileage, there is an issue with the fuel/ignition system that needs to be resolved, and resetting the BCM is not a solution.
    Is your T&C getting poor mileage or do you just want better mileage?

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  • Medium-star Best Answer
    sinautoscan.com November 07, 2009, 08:18
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     Master

    No this may cause your car to loose its programing and this will be expensive to fix you want better milage check your tire psi, change the oil and get a tune up

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    hangupz, November 07, 2009, 09:07
     Rookie

    Thanks, that's what I thought. Tire pressure OK. Air filter new. Oil changed before I bought it. Need to get plugs changed.

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    hangupz, November 07, 2009, 09:16
     Rookie

    I just bought this car. Dealer told me oil and filter changed. Air filter changed. I've checked tire pressure. Need to get plugs and fuel filter changed. But it is getting only 14 mpg and I can't see how that will increase it that much. It has 91,000 miles on it. I filled it when I got it, drove 225 miles, filled it again (16.1 gal).

    The mechanic said disconnecting the bcm would cause it to re-set to our driving habits within the next 100 miles or so. I have researched this on the internet and have not found any information on this.

    I would say 14mpg is poor mileage.

    Thanks all for replies.

    Ron

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