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Discussion Starter #1
Hey, i have a 2003 model 406 with automatic transmission. Sometimes when i shift from P to D, i get a flashing light on the dash beside the R (on the graph shownig gears P R N D...) and the car behaves unnormally. In addition, when i shift from P to R, it takes about 2 seconds to engage the reverse.. I scanned the car with obd2 scanner but got no codes related to the transmission. Any help is appreciated
 

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Hi welcome to the forum

I don’t know your particular question although on 2 automatic cars i have owned when the gears played up i found topping the auto oil up fixed the problem

Could the light you see be low transmission oil level

Sorry cant be more helpful :thumb:
 

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Yep check/change the oil it has probably never been changed due to it being sealed for life as the dealers call it but they do use oil over time leading to rough changes and locking out of top gear
 

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Discussion Starter #4
Sealed transmission are money traps from the dealers..
Thanks guys, will check the oil and post a reply for any update
 

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Hi & welcome.

First things first: change the oil.

Peugeot say it's sealed for life but this is a vicious lie.

It's crucial to use the correct oil: Esso LT71141.

If that doesn't improve it then you're probably looking at a new set of solenoids (and ideally software update too) for the valve block.
 

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Discussion Starter #6
UPDATE: So i changed the transmission oil yesterday, it was so black. Then i tried the car and the problem is still there.
 

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406 uses AL4 and ZF4HP depends on what engine is fitted but i have found sometimes once oil is changed it will gradually improve my C4 with al4 had lock out issues when cold but is fine now after 2 oil changes and a bit of use
 

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The problem is that i bought this car with no user manual, and the informations about the car are not known for me (HDI, Al4 or zf4hp...). So i am working my way through VINs and stuff to know my car.. The following image contains some infos, the transmission type is not included, but as my friend reliable_406 said the transmission can be known from the engine type.. So here is some infos i found from my VIN. And, is there a way to know my transmission type myself?


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I think those details are highly suspect. I've consulted the Service Box and Wikipedia, and neither show a 406 with XU9J4 1.9 gasoline engine.

According to Wikipedia, the XU9J4 was used in the 405, but not 406.
 

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Discussion Starter #15
And the answer is:



So that information you found shows the wrong engine, but it does have an AL4 gearbox.

This pdf may be of interest.
Thank you very much buddy :) that helped me. May i know what site have you entered to get the infos? For future reference

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Service Box

That will give you access to the Service Box, if you register as an "Independent Operator". You will get access to parts information, but repair procedures are pay-to-view.

I have it all on PC, plus the SEDRE (wiring information) from here. DO NOT click the blue rectangles - that leads to the expensive stuff. Scroll down and click any £9.99 offer - you will get the full databases for ALL the listed models.
 

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Discussion Starter #17
Service Box

That will give you access to the Service Box, if you register as an "Independent Operator". You will get access to parts information, but repair procedures are pay-to-view.

I have it all on PC, plus the SEDRE (wiring information) from here. DO NOT click the blue rectangles - that leads to the expensive stuff. Scroll down and click any £9.99 offer - you will get the full databases for ALL the listed models.
Thanks for your help mate! Wish you all the luck :)

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