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Old 04-03-2019, 04:24 PM
Fred_Man Fred_Man is offline
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Join Date: Apr 2019
Posts: 1
Default Lean Code Bank 1

I have a 2000 ford ranger 4 cylinder 5 speed manual 176,000 miles. I just replaced the exhaust system and catalytic converter along with the 2 o2 sensors. ever since ive been getting a lean code there are no exhaust leaks or vacuum leaks. but on the muffler to intermediate pipe connection where the u bolt is there is been a little bit of black soot coming out would that cause cold air to go upstream and cause a lean code? had no engine codes before the work
2000 ford ranger 4 Banger 5 speed manual
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Old 04-10-2019, 05:57 PM
bjurke bjurke is offline
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Join Date: Jul 2011
Posts: 339
Default Re: Lean Code Bank 1

one other possibility. i have a 2010 ranger. wiring harness was resting on top of motor and egr valve wiring was burnt through so egr valve was not working. after i elevated harness and replaced bad wiring problem solved.
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exhaust, lean code, muffler

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