'04 Taco with intermittent flashing CEL

Discussion in '1995 - 2004 Toyota Tacoma' started by eric weber, Jan 1, 2019.

  1. eric weber

    eric weber New Member

    Hi all,
    We have an '04 SR5 with 61K miles that has an intermittent flashing CEL. Initially, the codes were P0302 and P0305, but the diagnostics showed that all of the engine parameters were good while driving, except for an infrequent misfire. We ended up changing out the #5 coil pack and all the coil wires, new plugs, replaced the fuel filter, had the injectors cleaned and they checked the ECM. The CEL stayed off for a few days, came on (flashing) and shut off 10 minutes later while driving. We took it back to Toyota, they kept the truck for two days and could not find anything wrong after running the diagnostics and driving the truck under load a few times. In addition, no codes were stored. Our son got on the road and the CEL started flashing again, it shut off and stayed off for a 450 mile trip (the truck ran perfect the whole trip). A couple days after he arrived at his destination, it sarted flashing again, and the truck still runs fine.Could this be an electrical issue with the CEL? We are at a total loss for what is going on. Has anyone seen this before?


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  3. OR17TRD

    OR17TRD Well-Known Member

    Welcome to the forum. Gas cap?
    Unplug the battery for 20 min and reset everything?
  4. OP
    eric weber

    eric weber New Member

    That is a good possibility. It has the original gas cap. We will get an OEM cap and see how how things go.
    I will let you know.


    OR17TRD likes this.
  5. OP
    eric weber

    eric weber New Member


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