Peugot 406 Engine Temp Too High

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softdev

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Help!
I recently bought a 1999 Peugot 406 3.0 V6 with 82,000 miles on the clock. After sarting the engine and driving about 10 miles, the Stop light on the centre console comes on, the screen reads Engine Temp Too High and the fan comes on at maximum. Both temperature guages read normal. The Peugeot dealer has checked it with their diagnostic tools and tell me there is nothing wrong. My local garage is also unable to identify the problem. Since buying the car, the computer has been reset, I have had a new radiator and a new temperature sensor cluster fitted as well as a new timing belt. I would be most grateful for any ideas as I am worried that by just ignoring the message may be doing damage for which I will pay dearly for in the future.
 
If you recently bought it, then take it back.....

Or was it a private sale.

Andy
 
Sorry, by recently I meant several months ago. The guarantee period is long since over.
 
If purchased in the UK you have an automatic 1 year guarantee anyway, no matter what the dealer says.

If he refuses to sort it, take him to small claims.

Andy
 
Stolen from another forum.....

Today I took the family to my brother inlaws in Mountain Lakes NJ (about 85
miles). The pug was running just a little hot on the highway but when I started to climb the hills to his house the temp climbed too. I was about 2 needles shy of the top white mark when I pulled into his driveway and coolant was overflowing. I let the car continue to idle and the temp came back down to normal before I shut her down. Later in the day we were talking about my new Pug (he owned a 505 V6 which he loved) and I told him that I think my pressure cap must be bad keeping the system at too low pressure causing the overheats because I had been though everything else in the car. I told him that if it were a normal cap that I could purchase in a store, I would have purchased it just for the sake of changing it. He reaches over and unscrews the cap to look at it. He turns it over and shows me a 5mm gap in the rubber washer that is on the bottom of the threads inside the cap. He says hold on a minute and he takes the cap into the garage. When he comes out there is a perfect new gasket in the bottom of the cap. I asked where did you get that? He said, "I cut it out of an old rubber inner tube." Ok MacGyver, I'll try it.
Click to expand...

Andy
 
Thanks for that, I'll have a check. However, the problem isn't that it is overheating, more that it's telling me it's overheating. I'll see where I stand about the guarantee, but I always thought it was 3 months and then you had to pay.
 
softdev said:
Thanks for that, I'll have a check. However, the problem isn't that it is overheating, more that it's telling me it's overheating. I'll see where I stand about the guarantee, but I always thought it was 3 months and then you had to pay.
Click to expand...

Maybe in some states of America........ not in sunny england unless it was sold as seen...

Andy
 
We had this problem early on - turned out to be a temperature sensor problem and the normal diagnostics seemed to pick it up without any difficulty.

A search under temperature in this group would turn up a mass of information on this problem - don't limit it to 406.
 
You say the fan comes on at full speed. On Peugeots fitted with two fans they should both come on at the same either at slow speed or high speed. If you only have one fan working the cause of this is your problem.
 
Thanks, a faulty fan sounds like the problem as it happens with or without the aircon on. I'll have a check and let you know.
 
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