Hey guys, just quickly chasing up whether having a faulty coolant temp sensor (ecu unit, not the gauge) would give the car noticeably worse fuel economy like most others...

I know it is the temp sensor because the thermo fans are both going half speed, even when starting the vehicle cold..

Any help would be cool!

Cheers people!

Kaya.

a faulty coolant temp sensor would definitely cause poor fuel economy and would also cause hard starting, i would say there would be a fault code stored if you can get it checked somewhere. If its the Liberty I see as your avatar, they have two senders, one for the gauge and one for the ECU.

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F.B. Racing
01 WRX (STI badged)
2010 XR5 Focus
06 Impreza Hatch 2.0i

thought so!

yeah its got a temp sensor fault code and a cruise cont code too!

cheers for that mate! i'll have to get off my ass and put one in there i think! might save some dosh in the long run too! not to mention get rid of the gay ass engine light!

cheers! kaya.

Yep temp sensor can also make the car feel like it has a missfire but really its running it excessively rich, but its not always the sensor itself... check wiring harness too the sensor before replacing!

check!

i'll do a resistance test to see if the wire is broken somewhere in the line, and yeah all the other tests associated..

cheers for your help guys!

kaya.