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Fault Code 17 - Engine is cold too long
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Code 17 means that the engine temperature was still below 174 degrees after 8 minutes of operation. This could occur when the outside air temperature is very low, or if the thermostat is sticking open. A 180° thermostat, installed by many to reduce engine ping, can set this code if the is driven without a load in cool weather. Sometimes, a different sensor will have a resistance on the lower side of the acceptable resistance range, preventing a fault code with a 180° thermostat.

If the engine cooling system is functioning properly, the coolant temperature sensor may be out of range. As the temperature of the sensor increases, the resistance of the sensor should decrease. Typical vales for the sensor resistance are:

Temperature Resistance (Ohms)
°C °F Min Max
-40 -40 291.5k 381.7k
-20 -4 85.8k 108.4k
-10 14 49.3k 61.4k
0 32 29.3k 36.0k
10 50 18.0k 21.8k
20 68 11.3k 13.6k
25 77 9120 10.9k
30 86 7370 8570
40 104 4900 5750
50 122 3330 3880
60 140 2310 2670
70 158 1630 1870
80 176 1170 1340
90 194 860 970
100 212 640 720
110 230 480 540
120 248 370 410

 


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Last Update: August 8, 2001