89 pickup check engine codes 25 26 51

Asked by evojoe9 Nov 12, 2014 at 12:55 PM about the 1989 Toyota Pickup 2 Dr Deluxe 4WD Extended Cab SB

Question type: Maintenance & Repair

I have an 89 toyota pickup v6 manual transmission. What is the most common fixes if it's
throwing codes 25 26 and 51?

1 Answer
30,540

mikeatpriestlake answered 10 years ago

25 and 26 are opposite codes, lean condition and rich condition. for some reason the computer is confused. I had this problem on a chevy, and the pcv valve was bad. as far as the 51 code, there is a problem in a switch or circuit, maybe a/c or tps.

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