Question about 2001 Honda Odyssey

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Transmission -does fine until it warms up, then does not want to shift correctly, drive begins flashing.

Acts like they used to when mod valve wasn't working.

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  • Donal Grimes
    Donal Grimes Jan 02, 2014

    I have found an unplugged vacuum line clamped to the radiator hose, the other end plugs to transmission, could this be the prob? I can't find any ports close to it,

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  • Honda Master
  • 20,706 Answers

D flash mans, tranny fault
so scan it. us the obd2 scan tool, any and scan it.
the A/T IS VERY complex, do the tests shown in the FSM
guessing dont work
but in general (experience)
wont shift correctly dont cut it. (200 parts, and 50 was to mess up)
????
flare, skips gears, wont up shift, wont down shift, or shifts wrong speed. what gears work, what dont. just a clue and help goes get better
The tranny TCM can go to limphome mode, this mode is very clear.
and covered in the FSM and
one common failure, that happens with high mileage and poor service (not doing a flush at 50k miles)
is stuck in 1st gear, hot. only.
the ATF fluid gets more thin hot and pump output drops
this is usually a vary bad sign.
the Stall test fails.
the pump pressure test fails, hot.
there is no vacuum lines to this electronically shifted trans.
the ended back 1990(about). with old 3speeds.

scan it, could be something slimple like
the PRNDL shift switch fibbing like crazy. (common)
this car has TCM, a transmission brain.
look for OBD2 DTC errors P07xx (trans)
this TCM (part of PCM) function relies on sensor for shifting
they are:
1: TPS
2: engine INPUT rpm
3: tranny output rpm
4: shift selector.
5: ECT (engine temps)
6: ECU part of the PCM calculates load at all times and sends that to the TCM , so that TCM can down shift on hills, or upshift faster on the flat or down hill.
this LOAD feature is what replaced the VACUUM of old days.

The D light , hopefully is just a bad input (cheap)
scan it. and see, its begging for you to do that.

Posted on Jan 02, 2014

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Posted on Jan 02, 2017

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csmock132
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SOURCE: reverse acts as neutral. (auto tranny)

It is hard to say, but as long as all of the forward gears work fine, then it might work for a long time. But without knowing what is wrong, I would at least change the fluid to remove as much metal or clutch material as you can. Don't worry about the filter, you can't change it without disassembling the trans. Just drain the fluid and refill it. This won't fix reverse, but it might prolong further problems. And don't park where you can't pull straight out.

Posted on Mar 09, 2009

  • 8 Answers

SOURCE: 1991 honda accord se the s light is flashing.put

you may need the electrics checked?or fuses an links

Posted on Dec 05, 2009

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