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Discussion Starter #1
Hi
engine management light came on and antipollution fault on dash and read these codes P0597 thermostat heater control circuit open and also P2231 02 sensor signal circuit shorted to heater circuit bank 1 senso 1 ,Is that the Lamba sensor ?? Car was low on water as my daughter doesnt check enough.

any help appreciated thanks julian
 

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Discussion Starter #2
Hi
engine management light came on and antipollution fault on dash and read these codes P0597 thermostat heater control circuit open and also P2231 02 sensor signal circuit shorted to heater circuit bank 1 senso 1 ,Is that the Lamba sensor ?? Car was low on water as my daughter doesnt check enough.

any help appreciated thanks julian
update also the fan is running constantly any ideas ?Should i try replacing the engine temperature sensor first as the wire looks ok going to it after inspecting it.
 

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P0597 - look at the rear of the thermostat housing and there's a two-pin plug kind of pointing down and towards the bulkhead. That's the thermostat heater connector. See if it's corroded.
 

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Discussion Starter #4
P0597 - look at the rear of the thermostat housing and there's a two-pin plug kind of pointing down and towards the bulkhead. That's the thermostat heater connector. See if it's corroded.
Cheers Equinox i found the 2 pin plug but cant see how it releases to remove plug,when i get it out if it isnt corroded does that mean i would have to buy the complete thermostat housing to replace the switch if its faulty.
thanks for your help
julian
 

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Discussion Starter #5
Cheers Equinox i found the 2 pin plug but cant see how it releases to remove plug,when i get it out if it isnt corroded does that mean i would have to buy the complete thermostat housing to replace the switch if its faulty.
thanks for your help
julian
Also where can i buy this housing as seems so many different ones and some threads mention different wiring loom adapter and cheap ones can break easy
any recommendations please ?
julian
 

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before going any further remove a battery lead and pull main plugs fron ecu and fusebox, check for any water or corrosion.
the o2 sensor is the top and more expensive one so rule out a short first.

have taken apart a thermostat heater before and its just a heating element so guess you can do a resistance check on that.
 

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Cheers Equinox i found the 2 pin plug but cant see how it releases to remove plug,when i get it out if it isnt corroded does that mean i would have to buy the complete thermostat housing to replace the switch if its faulty.
thanks for your help
julian
Engine compartment is full of very similar plugs. For the best clue have a look at the connector on the Exhaust Electrovalve. its at the front of the engine, on the left as you're looking at it, just below the rocker cover, pointing towards the front of the car.

To remove the connector you gently prise upwards on a locking tab with a small screwdriver. Figure out how it works on the electrovalve then try the thermostat heater - but this time the bloody locking tab is UNDERNEATH!!!

Have fun :lol:
 

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Discussion Starter #9
before going any further remove a battery lead and pull main plugs fron ecu and fusebox, check for any water or corrosion.
the o2 sensor is the top and more expensive one so rule out a short first.

have taken apart a thermostat heater before and its just a heating element so guess you can do a resistance check on that.
Many thanks ive checked most connections and all seem good and clean just need get that stupid clip undone on thermostat control switch which i now have good advice on.
cheers for your help
 

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Discussion Starter #10
Engine compartment is full of very similar plugs. For the best clue have a look at the connector on the Exhaust Electrovalve. its at the front of the engine, on the left as you're looking at it, just below the rocker cover, pointing towards the front of the car.

To remove the connector you gently prise upwards on a locking tab with a small screwdriver. Figure out how it works on the electrovalve then try the thermostat heater - but this time the bloody locking tab is UNDERNEATH!!!

Have fun :lol:
Many thanks Equinox i will give it a go when its daylight ,typical its at bottom lol.
 

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Thanks Equinox so would that fit my 1.4 vti 95 2008 and i can deal with the extra hose blank do you know ??

many thanks for your time
julian
Just double checked on Servicebox and they're identical. So what worked for me will work for you too.

Do try to find why you have lost some coolant. Water pump is a favourite.
 

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Just double checked on Servicebox and they're identical. So what worked for me will work for you too.

Do try to find why you have lost some coolant. Water pump is a favourite.
Many thanks Equinox ok i know your link has ended for the sensor unit but do you think this is the same ??
https://www.ebay.co.uk/itm/THERMOSTAT-HOUSING-SENSOR-SEAL-PEUGEOT-207-CC-SW-3008-308-CC-SW-5008-RCZ-1-6-16V/302940904327?fits=Car+Make:Peugeot&hash=item4688af5b87:g:vY8AAOSwNo9b2aC6:rk:1:pf:0

many thanks
julian
 

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Just double checked on Servicebox and they're identical. So what worked for me will work for you too.

Do try to find why you have lost some coolant. Water pump is a favourite.
Many thanks Equinox ok i know your link has ended for the sensor unit but do you think this is the same ??
https://www.ebay.co.uk/itm/THERMOSTAT-HOUSING-SENSOR-SEAL-PEUGEOT-207-CC-SW-3008-308-CC-SW-5008-RCZ-1-6-16V/302940904327?fits=Car+Make:Peugeot&hash=item4688af5b87:g:vY8AAOSwNo9b2aC6:rk:1<img src="http://www.peugeotforums.com/forums/images/smilies/tongue.gif" border="0" alt="" title="Stick Out Tongue" class="inlineimg" />f:0

many thanks
julian
That's the one!
 

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Discussion Starter #16
That's the one!
Many thanks equinox for all your help took me all day change the Thermostat housing and the Lambda Sensor.
Hardest part was that flipping clip at back of engine spent 2 hours to get it back on but all done now and all codes cleared.

Your help was much appreciated.
thanks julian
 

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Oh yes, that clip on the pipe that goes from the thermostat housing to the water pump. Oh how we laughed!

Yeah, after a while I was just going to pour petrol over the whole lot and light it, then walk naked down the middle of the road. But I got it on... Eventually...

Consider yourself initiated into the very exclusive 'clip-at-the-back' club. There should be a badge. And a nursing home for later life.
 
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