Faulty 406 Speedo - no glovebox unit

Discussion in 'Peugeot 406' started by davis.pj, Oct 24, 2007.

  1. davis.pj

    davis.pj Guest

    The speedo on my 2000 (X-reg) 2.0i 406 has suffered from occasionally
    wobbling and temporarily dead symptoms for over a year now - however
    last weekend it seems to have died completely. Phoned my local Peugeot
    dealer to order the Speedo Interface box referred to in other posts
    only to be told that it isn't fitted to my model, only the larger
    petrol engine and diesels. Is that true (haven't had a chance to check
    yet) ? They also told me that on my model there is only one electronic
    speedo unit and its attached to the gearbox housing (cost around £25).
    Does anyone know if this is the likely cause and how tricky it is to
    replace ?

    davis.pj, Oct 24, 2007
  2. davis.pj

    David Hearn Guest

    I had a similar issue with my 1998 306 rev counter. It would keep
    sticking (and only moving upwards), sometimes not working, sometimes
    resetting back to zero etc. In my case I diagnosed it as a dodgy motor
    driving the dial. I swapped the motor over with the speedo one and then
    the speedo one went wrong, with the rev one working. I then swapped
    them back, but didn't re-fit the rev out, rather fitted a blanking bit
    of card behind the dial to block out the hole.

    Lost a rev counter, but cheaper than the £300+ that Peugeot wanted for
    the new instrument cluster.

    David Hearn, Oct 24, 2007
  3. davis.pj

    Bob Minchin Guest

    This sounds like you might have a similar unit to my late model 405. An
    electronic sensor that goes to the ECU and a cable drive to the dash.
    The fault on my was the teeth on the driven pinion in the gear box
    stripped. Only a few quid for a new one and an hour or so to change it.

    Bob Minchin, Oct 24, 2007
  4. davis.pj

    Nigel Guest

    Yes only some models have the unit behind the glovebox. The vehicle
    speed sensor is the next likely reason, and is held in with a 6mm
    allen key. Easy to change but you could lose a bit of oil when it is
    removed so put a container underneath to catch it. I think on the
    petrol models it is reachable from above.
    Nigel, Oct 25, 2007
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