spirou Posted September 21, 2018 Share Posted September 21, 2018 Another thread below reminded me of our "little" problem that's been on hold since winter and has left me and the garage confused so far. It's a standard PSA 2.2 liter 130bhp engine from late 2013 with some 130000km/80000 miles behind it. The symptoms are simple and I've only noticed them since Greece this winter. The engine never warms up to normal working temperature once the outside temperatures are below about 10°C unless you drive uphill or on a motorway for a long time. Even on a motorway, if you take your foot off and coast for a minute or so (at toll stations etc.) or drive downhill, the needle will drop by a quarter or even all the way. On flat regional roads at speeds below 50-60 mph the needle eventually goes up to quarter mark, often going lower if there are many turns and you obviously switch between brake, coast, accelerate constantly. Getting to that quarter mark takes forever when temperatures are below freezing. The engine otherwise seems to work fine and there are no other apparent issues. My scan tool didn't give me any obvious clues (other than low engine temp) and there were no engine fault codes. In essence, the cooling pump seems to work excessively in colder temperatures. No such problems when it's warmer. At least not apparent. We've taken it to a Citroen pro garage and they've had a look and found no issues. Pump and fan work normally. The problem is that they had it when temperature was around 20. Obviously I plan on taking it back when it's around freezing but I'd be interested to hear opinions. Euroserv? Link to comment Share on other sites More sharing options...
Grumblewagon Posted September 21, 2018 Share Posted September 21, 2018 Sounds like the thermostat is stuck open. This happened with OH's car and the garage swore it was OK, because they tested it in a heated workshop. As soon as it went outside, the temp fell. Or, it could be that it is warming up, but the temp sender is duff. Link to comment Share on other sites More sharing options...
Robinhood Posted September 21, 2018 Share Posted September 21, 2018 I would have thought that the obvious first point of call would be a faulty thermostat, but I would be surprised (or possibly not) if the Citroen garage hadn't checked that out as the prime suspect. (posted in parallel with the above) Link to comment Share on other sites More sharing options...
747 Posted September 22, 2018 Share Posted September 22, 2018 I am certainly no expert but I have had a couple of problems with motor cars which were down to the failure of things like oil pressure switches and a temperature sensor. My car is a Skoda (therefore part of the VW Group) and my mechanic told me he had changed a number of these. This problem was not solely a VW one but occurred with various car makers. Link to comment Share on other sites More sharing options...
Kennyd Posted September 22, 2018 Share Posted September 22, 2018 Having changed a few over the years , It Sounds like the thermostat to me Link to comment Share on other sites More sharing options...
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