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My 2003 ford f150 the truck just started running very rough…

Customer Question
My 2003 ford f150...
My 2003 ford f150 the truck just started running very rough the computer says it has 17 faults, example says Battery is faulty the battery test fine, says the o2 sensor heaters are not working several other faults????? HELP
Submitted: 2 years ago.Category: Ford
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Answered in 36 minutes by:
1/25/2016
Ford Mechanic: Jared D, ASE Certified Technician replied 2 years ago
Jared D
Jared D, ASE Certified Technician
Category: Ford
Satisfied Customers: 2,314
Experience: Shop Supervisor at County Fleet
Verified

With that many faults the most likely cause is a voltage problem.

Do you have a multi-meter to check alternator output?

When you say the battery tests fine, what is the amperage rating?

What are the codes that are displayed?

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Customer reply replied 2 years ago
thx for quik response
Ford Mechanic: Jared D, ASE Certified Technician replied 2 years ago

Do you need any additional info?

I'd love to help you get this one sorted out.

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Customer reply replied 2 years ago
truck fixed inspected wiring found all faults in same circuit. poor connection at battery jct box. replaced D fuse. no more faults
Ford Mechanic: Jared D, ASE Certified Technician replied 2 years ago

Oh ok. Please let me know if you need help in the future.

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