Question about Peugeot 405

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I have an overheating problem with my Peugeot 307, 2001 model (1.6 litre petrol). When I'm on the highway the temperature gauge reads between 70 & 90. But when I'm caught in traffic it reads that the "engine coolant temperature is too high". As soon as I;m out of traffic and I am travelling at a good speed, the temperature goes down. Is this linked to the A/C because the A/C is very "moody", sometimes it works sometimes it doesn't. Please help.

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  • 252 Answers

Hi

check the coolant in the radiator. Once the car is up to temp (engine running), squeeze the top radiator hose, if it is cold, then you have an airlock. Let the engine cool, remove radiator cap and run the engine for 20 minutes, topping up the coolant when it lowers.

The AC might need recharged at the same time with Freon.

Hope this helps.

Posted on Sep 02, 2010

  • xxxx Sep 03, 2010

    Hi, I tried doing what you said but the coolant boiled out. I replaced the lost coolant and we were back to square one with the car overheating when idling or in traffic but cooling back down in the highway. Any suggestions because I dread going to my local deal because they are ridiculously expensive... I'm in Zimbabwe (Africa)!!!

  • Dan Martin
    Dan Martin Sep 04, 2010

    Hi,

    When idling or in traffic does the fan (on the radiator) work? Check the operation of the fan first, if it is OK it sounds like your water pump is not working properly and needs replaced. It's not a difficult job but you do need to get your hands dirty and you might as well replace the cambelt while the pump is off.

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1 Answer

Temperature gauge on my Peugeot 207 keeps going from normal to 0 and staying there no leaks visible no coolant lose


Normal to COLD?
You would only lose coolant if the engine was overheating - or, as you say - a leak.

It's probably a faulty temperature sending unit - these are common failures. You actually have nothing to worry about. The unit sends a signal from the engine to your temperature gauge in the car. Even if the unit is faulty the engine is still operating at the correct temperature - it's the signal to the temperature gauge that is wrong.

Your temperature sensor will look something like in the image below:
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I read your question about the car heater.. No, the sensor wouldn't cause the heater to blow cold air. That fault is either air in the cooling system/heater system, or a blocked heater matrix.

Remove your radiator cap/coolant bottle cap. Open the heater controls to HOT and set on maximum. Start the engine and let it tick over - see if it forces any air out of the system when the heater should begin blowing hot.

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Perfomance data for peugeot engine code 1cw7p


what country sold? lots of 405s' world wide and diffr.
engine performance ?(on an engine stand?)
or the driving wheels to road performance.?
please say exactly what you want or post symptoms. or?
engine codes are very hard to find here. (USA)
ah, but are here.
http://www.scribd.com/doc/25423642/Peugeot-Engine-Code-Reference-List
XU5 or XU9 something are the engine, codes.

wiki: ,see bold , I added.
The 405 was available as a 4-door only. Four-cylinder petrol engines included 65, 92, 110, 125, and 160 hp (48, 69, 82, 93, and 119 kW) units. A 1.8-litre diesel engine, with or without a turbo (70 and 90 hp (52 and 67 kW)) was added to the range during 1988 as was the 5-door estate.
the 405 ended in USA in 1991.
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Most likely the ECU (Engine Computer Unit) is responding to some duff sensor / loose cable / whatever ..

All modern engines have more sensors than you can shake a stick at, some positioned in the most inaccessible places, that can cause the most obscure problems imaginable (remember the Oxygen Sensor in the Exhaust manifold that was 'poisioned' by some dufff supermarket petrol ??)

It's a Peugeot garage computerised diagnostics job I'm afraid...

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