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Old 07-18-2023, 11:26 AM #1
CO4x499 CO4x499 is offline
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CO4x499 CO4x499 is offline
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Join Date: Sep 2014
Location: Denver
Posts: 49
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Red face P0171/P0101/P0138 after installing new battery. I've replaced the MAF and gas cap.
Yup, dreaded P0171.

After putting a new battery in the car a month ago, the CEL/VSC/traction lights came on. Nothing else was done to the truck and the lights were not on before changing th battery - they come on after.

I had it scanned at AZ. Gave me P0171. I replaced the MAF (Denso off Amazon) and have tried two new gas caps (pretty sure they're both OEM/genuine the description said so).

The printout says, "secondary DTCs: P0101 and P0138". Does that mean my car is also throwing those codes? The guy did not know.

What should I do next?
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battery , car , gas , lights , p0171

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