Engine warning light..please help - Toyota Yaris Forums

finnpoulsen · 12-18-2014, 01:29 PM

The engine yellow/orange warning light in the dashboard on my 2005 1.3 2sz-fe went on today :-(
The car felt normal so I continued driving home. I tried to fasten the gas cap and I also disconnected the negative terminal on the battery to see if the warning light did a reset. It didn't :-(...I noticed that the radiator fan started when I turned the ignition to on (without starting), so i let the engine cool off and gave it another try.The same thing happened, the radiator fan began spinning. It turned off and on with an interval go about a minute, even though the engine was cold. I have a had a minor leak around the water pump for some time, but has not been a problem and I always kept the coolant reservoir full...
Any ideas?
Thanks

tmontague · 12-19-2014, 09:39 AM

first, find out what the code is. Second, get your WP fixed. The code may be something as simple as a sensor gone bad

finnpoulsen · 12-20-2014, 02:22 PM

Thanks..let's hope it's a broken sensor

Sent from my iPad using Tapatalk HD

colj00 · 12-20-2014, 10:54 PM

i believe that your coolant temp sensor has gone bad, its designed in a way that the fan would be on 100% of the time if the sensor failed, instead of 0%.

finnpoulsen · 12-21-2014, 07:16 PM

Thanks...do you know where the coolant temp sensor is located?

12-18-2014, 01:29 PM	#1
finnpoulsen Drives: yaris 2sz-fe Join Date: May 2009 Location: Denmark Posts: 7	Engine warning light..please help The engine yellow/orange warning light in the dashboard on my 2005 1.3 2sz-fe went on today :-( The car felt normal so I continued driving home. I tried to fasten the gas cap and I also disconnected the negative terminal on the battery to see if the warning light did a reset. It didn't :-(...I noticed that the radiator fan started when I turned the ignition to on (without starting), so i let the engine cool off and gave it another try.The same thing happened, the radiator fan began spinning. It turned off and on with an interval go about a minute, even though the engine was cold. I have a had a minor leak around the water pump for some time, but has not been a problem and I always kept the coolant reservoir full... Any ideas? Thanks

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12-19-2014, 09:39 AM	#2
tmontague View User's Garage Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012 Location: Caledonia Ont. Posts: 2,938	first, find out what the code is. Second, get your WP fixed. The code may be something as simple as a sensor gone bad

12-20-2014, 02:22 PM	#3
finnpoulsen Drives: yaris 2sz-fe Join Date: May 2009 Location: Denmark Posts: 7	Thanks..let's hope it's a broken sensor Sent from my iPad using Tapatalk HD

12-20-2014, 10:54 PM	#4
colj00 DIYer Drives: yaris 1.5 MT Join Date: Oct 2014 Location: perth, WA, straya Posts: 22	i believe that your coolant temp sensor has gone bad, its designed in a way that the fan would be on 100% of the time if the sensor failed, instead of 0%.

12-21-2014, 07:16 PM	#5
finnpoulsen Drives: yaris 2sz-fe Join Date: May 2009 Location: Denmark Posts: 7	Thanks...do you know where the coolant temp sensor is located?