W203 220 CDI - Engine Temperature

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Wully

Active Member
Joined
Jul 2, 2004
Messages
502
Location
Glasgow
Car
2002 W203 C220 CDI Avantgarde SE Auto
All

A while ago I replaced the thermostat due to low engine temperatures and as a result I saw around approx 90 degrees at full heat.

However with the recent cold snap I can't seem to get the temperature to rise above approx 70 degrees and I'm thinking surely the stat can't fail in such a small period of time.

So to see if there was anything going on I stuck in on DAS and I have a current and stored fault as follows:-

B1003 Component M13 (Heating water circulation pump) or the line to the
component has a short circuit to ground or open circuit. Component
M13 (Heating water circulation pump) is not installed. Ignore fault
code if it nevertheless occurs.


I ran through an activation test and the pump is coming on when prompted.

Could this be related to the low temperatures I'm seeing?
 
70c sounds fine in this weather. My 320 just about gets to 80c in my 12 mile run to work in the morning!
 

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