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Re: P1604 on 2015 Tacoma
Posted to Technical Discussion Forum on 5/5/2016 1 Reply

Hi Steven,

This appears to be a pretty vague code to say the least. Appears the PCM knows there is a runability issue with the engine and it will need to be diagnosed. Here is a print screen of the descriptor on Toyota's site.

Also, this should be under wa... Login to read more.

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