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Possible issue with Hewittech Bypass.

Discussion in '2nd Gen Tundras (2007-2013)' started by Landshark, Aug 28, 2025.

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Aug 28, 2025 at 10:00 AM

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Landshark [OP] New Member

Joined:

Dec 12, 2021

Member:

#71702

Messages:

8

Been chasing an issue with my 2007 Tundra 4.7 220k with the Hewitttech by pass installed. Keep getting a check engine light on with P0101 and P0172. Have replaced the MAF toyota part and this kept the codes clear for about two weeks then this morning the codes returned. This all started when the purple wire came loose about two months ago and I had to limp it home. Been tripping codes since. Bypass has been on the truck for about 8-10 years block plates installed. Every time I unhook the module and reconnect it, I'm good for about two weeks then codes again. Wondering if the Texas heat may have cooked the module? Or I hurt it when the purple wire came loose?

Landshark, Aug 28, 2025

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