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Old 03-17-2010, 06:42 PM   eBay Motors  #1 (permalink)
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code c0055

okay guys lets rally this one....few weeks ago everything cool...was getting 300-330 per tank of fuel....got new tires same size as before (285/75/16) on stock rims and no lift....drove to indiana...mileage went to 250 per tank....no codes nothing....well was driving forty miles and abs and park brake light go on..with service brake system....pulled codes and got c0055. bought a new speed sensor....so do i need a to get abs module rebuilt now....what about the horrible fuel mileage. thanks in advance.

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Old 03-18-2010, 08:02 AM   eBay Motors  #2 (permalink)
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anybody...pleeeze help
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Old 03-19-2010, 06:13 AM   eBay Motors  #3 (permalink)
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pleeeeze....
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Old 03-19-2010, 06:47 AM   eBay Motors  #4 (permalink)
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no isea, unless your parking brake is dragging
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Old 03-19-2010, 09:24 AM   eBay Motors  #5 (permalink)
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nope checked all the easy stuff...this thing is throwing me for a real doozie....was hoping some seasoned veterans would chime in...
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Old 03-19-2010, 09:47 AM   eBay Motors  #6 (permalink)
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speed sensor is the root of all your problems. Computer reads truck speed via speed sensor to tell abs in event of panic stop how much brake force to apply, also speed sensor and air flow and or map sensor to adjust fuel and air ratio. So once you install sensor and clear codes you should go back to normal. Atleast it did with my truck last year. Same problems same symptons.
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Old 03-19-2010, 01:37 PM   eBay Motors  #7 (permalink)
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so when i had the genisys hooked up to it to monitor codes and info..the datastream read that at a standstill all three sensors were reading 3mph...this was with the bullydog program installed...
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Old 03-22-2010, 07:14 AM   eBay Motors  #8 (permalink)
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i changed the rear speed sensor and have checked the hubs.....no better...the speed sensor had some wear marks on the pickup area...maybe a t-case with some slop?
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