I have a 2013 C3 Picasso Exclusive with the 1.6VTi 120 engine and EGS6 gearbox. Recently, I've noticed the cabin heating is....pathetic..... with lukewarm air coming from the vents with the knob set to "Hi" , the blue engine temperature warning lamp takes about 8 times as far to go out as it used to (12miles as opposed to 1.5) and the Mpg figure has dropped from a lousy 43mpg to a catastrophic 38mpg. I believe the engine is not getting to the correct temperature and the engine is running rich as a result, the cabin heater isn't being fed with water hot enough. This suggests a problem with the