CRV Engine Light - Started Blinking (81,000 Miles)

Discussion in 'CR-V' started by nybaseball22, Nov 27, 2007.

  1. nybaseball22

    nybaseball22 Guest

    Hello All. Just wanted to post something in case anyone has a similar
    problem. Recently, the engine light came on in my 2001 Honda CRV (4
    cylinder, 5 speed manual). I noticed a slow drop in fuel economy,
    from an average of 26.5, slowly down to around 21.5 over the course of
    about 1 month and the engine began to idle harder than normal, with a
    slight jump. I took it to a Honda Dealership and they told me it
    coded for a misfire in cycliner 1. They said it could be spark plugs,
    coils, or fuel injection. About 2 weeks later, the engine light began
    flashing when I sat at idle for about 30 seconds. I immediately
    called another Honda dealership and took it in. Analysis said it was
    actually a misfire in all 4 cylinders. Apparently there was a tech
    bulletin that this model had shown a tendancy to build up carbon on
    the head gaskets and "gunk" in the valves. This lead to the misfires
    and loss of fuel economy. Honda changed the spark plugs, cleaned and
    adjusted the valves, and performed a top end cleaning of the gaskets.
    Problem solved. Idle was back to normal, gas mileage was back to
    normal. The entire job cost about $250.

    I searched this group for answers when I had the problem and found
    some useful information. I just wanted to help out any of you who
    might have this issue in the future.

    Good luck.
    nybaseball22, Nov 27, 2007
  2. nybaseball22

    Tegger Guest

    You had a DTC P0301...

    You had DTCs P0301, 302, 303 and 304 all at the same time?

    You sure that's it? Was the TSB number 03-038?

    Are you sure they didn't in fact replace the head under a goodwill

    TSB 03-038 has to do with exhaust valves receding into the head. If you
    had the issue listed in 03-038, your problem will eventually come back.
    Tegger, Nov 27, 2007
  3. nybaseball22

    nybaseball22 Guest

    Thanks Tegger. The original code was P0301. The codes listed at the
    Dealership that did the repair was P0301, P0302, P0303, P0304.

    Does this sound correct? It looks like they replaced the gasket head
    cover, but there is no indication the head was replaced, nor did they
    mention that.
    nybaseball22, Nov 27, 2007
  4. nybaseball22

    Tegger Guest

    According to TSB 03-038, the problem is due to one or more exhaust valves
    receding (sinking) into their respective seats. Valve recession is usually
    the effect of valve seats that are insufficiently hardened, which is a
    quality defect.

    If the valves recede, the valve/lifter clearance closes up, which
    eventually results in misfires and burnt valves. Evidently the dealer
    determined your valves were not burnt, so they simply readjusted them to
    account for the recession.

    The danger here is that if your valves receded so as to cause the trouble
    in the first place, then they may recede more over time, and the problem
    may recur. And eventually you'll run out of adjustment in the adjustment
    mechanism and need to replace the entire head ($$$!).

    The dealer may have done this quickie fix because you're well out of the
    official warranty and they don't see any chance of being able to claim any
    kind of reimbursement from Honda for a proper repair. And maybe they've had
    success simply adjusting the valves in other cars with this problem. Maybe
    the valve seats work-harden to the point where recession lessens over time.

    If I were you, I'd have the valves checked every year, and ask the tech to
    note the initial clearances before he adjusts them. This way you can have a
    running record and can note any changes over time. Normal valves don't
    change more than a thou or two over many years, so a defective seat will be
    very obvious.
    Tegger, Nov 27, 2007
  5. nybaseball22

    motsco_ Guest


    Your dealer is:

    A - Trying to spare you a bunch of info he doesn't think you'll understand.
    B - Unaware of the reality of the Gen 1 CR-V engine.

    C - Likely both of the above.

    Read this and resign yourself to finding an independent mechanic who
    will give you good (loose) valve adjustments every 30,000 Miles, for a
    reasonable price. Take him a bottle of Dual Pump Fluid at the same time,
    or learn to change it yourself.

    motsco_, Nov 28, 2007
  6. nybaseball22

    nybaseball22 Guest

    To both Curly and Tegger, I thank you very much for the advice. I
    will note it and make sure to have this work done. It is folks like
    you that make this type of site and chat board helpful and useful for
    everyone. I am glad I posted this.
    nybaseball22, Nov 28, 2007
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