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Error code po171, 96 Toyota Tacoma 2.4?

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Old 05 Mar 2011, 10:24 am   #1 (permalink)
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Default Error code po171, 96 Toyota Tacoma 2.4?
Just purchased this vehicle and it is my daily driver, just fixed the o2 sensor( was loose ) and need to get a new thermostat but now Iam getting error code171, what do I need to check in the fuel system?
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Old 05 Mar 2011, 10:39 am   #2 (permalink)
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go to TTORA.com lots of guys there to help
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Old 05 Mar 2011, 10:54 am   #3 (permalink)
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P0171 is a code for lean mixture. The main suspect is a vacuum leak into the intake manifold or throttle body. Start with the large hoses - the PCV and brake booster hoses. If you don't see anything, verify the code is "permanent" by driving a few hours and then clearing the code. Since you just replaced the O2 sensor I wonder if it is finally able to realize the mixture is lean or if it hasn't trimmed itself yet.































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