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Ask Jared D Your Own Question
Jared D
Jared D, ASE Certified Technician
Category: Ford
Satisfied Customers: 1444
Experience:  Shop Supervisor at County Fleet
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My 2003 ford f150 the truck just started running very rough

Customer Question

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: 11 months ago.
Category: Ford
Expert:  Jared D replied 11 months ago.

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: replied 11 months ago.
thx for quik response
Expert:  Jared D replied 11 months ago.

Do you need any additional info?

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

Customer: replied 11 months ago.
truck fixed inspected wiring found all faults in same circuit. poor connection at battery jct box. replaced D fuse. no more faults
Expert:  Jared D replied 11 months ago.

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