Question about 1991 Peugeot 405

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Peugeot 406 2001 automatic transmission problem

I have a Peugeot 406 year 2001, familiale(SW). The car has a problem in the automatic transmission. Every morning, when I leave to work, after a couple of miles the transmission skips the gear and goes to a "SAFETY MODE" state. The leds for snow and sport start flashing. I turn of the engine and turn it on again and the transmission goes back to normal. This happens up to three times in a row. After that it does not happen again until the end of the day, after some 8 hours on the parking lot.
Wat is wrong? Can somebody give me some tips to fiz this problem?

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  • oberyuz Dec 30, 2008

    I have 2005 peugeot 206 automatic (tiptronic) car. I've the exact same problem. When I checked on some forums I saw lots of people having the exact same situation. I think those transmissions has a production or design malfunction. I took the car to authorised dealer they instantly recognized the problem and said complete transmission (hydraulics) block maybe replaced. After diagnosis they said we've updated your ECU it must be ok now but problem reoccured just after one day and now it happens often.

  • BIGGARthanU Jan 03, 2009

    I've got EXACTLY the same problem!! I have a V(1999) reg auto peugeot 406. Dealers and specialists that I've spoken to have been no help at all. Got so used to it now I take a biscuit (or too) with me for when I have to pull over to re-start.

  • palitha_yagg
    palitha_yagg Dec 31, 2012

    Well I have the same problem and it developed in to a situation where now the reverse gear does not work. the repair man was on the opinion that I have to replace the whole thing.


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Possible causes are; Low fluid level, bad pump, bad control valving, or a bad torque converter....accordianman

Posted on Dec 15, 2008

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Hi , i am wael hammami from jordan .
for the problem in gearbox at morning or cold just you have to change to main pressure regulatornd and every things will be ok
i have special center for peugeot and ciroen services

Posted on Jan 22, 2010

  • John SEIPP Dec 12, 2010

    Thank you ,
    Do you suggest it is fairly simple


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The problem is not on the gearbox, it is on the car's earth system. Peugeot fits the earth wires in the engine bay very badly. They do not properly remove the car paint from the earthing points before fitting the earth wire. So the solenoid in the gearbox discontinue circuit intermittantly and then return to safety mode. My solution is to clean up all the relevant earth points and to add in extra high quality aftermarket ground wires together with a Suntune Electrical stabilizer. Additionally, I also check up all the senors connection of both two ECU. If you do the job properly, your box shall run very smoothly and response quickly as it should be.

Posted on Aug 14, 2013

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Where can i fix my transsmation car 406 in egypt (automatic) i want the program that show the prodlem car

Posted on Dec 03, 2011

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If this car has the dpo transmission, this is easy to check. Open the bonnet look down the front of the transmission (right hand side) if there is a square black sump pan it is a dpo. it is most likely a sensor or a solonoid fault. You will have to have the transmission scanned by a specialist. Let us know where you are and we can point you in the right direction.

Posted on Dec 19, 2008

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Peogot 2002 406 2.0 deisel automatic gear box oil is leaking from the bottom can anyone help thanks

Posted on Apr 20, 2011

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I had exactly the same problem and added a bottle of Translube RED ($10) to the fluid. It suppost to free sticking valves. It helped and now the problem only occurs half as often.

Posted on Sep 29, 2009

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