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International Automotive Technicians Network
Re: 4-Runner, codes 25 and 26
Posted to Technical Discussion Forum on 11/8/2000

Hi Aaron,

To add what has been already said, look for ignition system problems, as the O2 sensors "see" raw fuel from any condition that will send raw HC down the pipe. Common faults on carbureted Toyotas that came up with these two codes together, was a vac... Login to read more.