Hello all, was wondering if anyone here ever had a lean code (P0171) issue. My truck has had it for a couple months and I have thrown many parts at it, but it won't give me a break. Any suggestions?
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Lean Code, P0171
- Thread starter GuyWithMazda
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- Jul 23, 2009
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- 2004
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- 4.0 V6
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- Automatic
What parts?
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- 13,864
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- 2.9 V6
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- Manual
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Lean codes are usually a result of a vacuum leak.
I have replaced the IAC, the exhaust manifold gasket, fuel filter, PCM, O2 sensors, temp sensor, previous owner replaced some of the emissions parts, timing belt, and PCV valve. I have taken it to a shop, and they said it has no vacuum leaks. I will be replacing the fuel injectors soon.
White_4x4Ranger
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- Dec 16, 2023
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- Wenatchee, WA
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- 2003
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- 4.0 V6
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- Manual
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- 31”
maybe do a fog test.
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