1997 - 2003 F-150

service engine soon light

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Old May 21, 2012 | 11:12 PM
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service engine soon light

I have a 2001 f150 4.2L V6, I just turned 130000 miles on it, and the service engine soon light just came on, the truck runs great, and I just replaced the alternater, anyone have any idea what the problem could be?
 
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Old May 21, 2012 | 11:18 PM
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From: Joplin MO
You need to get the OBD2 codes read. Most parts stores will read them at no charge, post back with the exact "P" numbers. If you have to, you can buy your own code scanner for less than 50 bucks.
 
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Old May 21, 2012 | 11:26 PM
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Great, thanks for the info.
 
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Old May 22, 2012 | 10:44 PM
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Problem solved, and fixed, Pcode #P0156, oxygen senser banks2, senser2, 50 bucks at autozone, 10 minute install, just make sure you have the oxygen senser socket tool, and your on the road...
 
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Old Jun 28, 2012 | 08:12 PM
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i have the same codes...has your problem gone away or is has it come back on?..people tell me its the isolator bolts?
 
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Old Jun 29, 2012 | 12:38 AM
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From: Joplin MO
No, a P0156 is a bad O2 sensor or the wiring to it.
 
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