1986 Pontiac Fiero TEMP GAUGE

1986 PONTIAC FIERO
116,000 MILES • 6 CYL • 2WD • AUTOMATIC
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SEASIDESEAHORSE
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I have a problem with the Temp Sensor. I have replaced the temp sender but the tempature guage immediately goes past the red. The engine is not hot and the Temp light does not come on. I get a code 15
when checking the codes. The fan DOES go on when I turn on the A/C. Help!!!
Aug 18, 2010 at 7:26 PM
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RASMATAZ
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How about about the coolant temperature sensor also did you test the wires?
Aug 18, 2010 at 8:11 PM
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SATURNTECH9
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https://images.2carpros.com/forum/automotive_pictures/416332_1986_pontiac_fiero_code_15_part1_1.jpg


https://images.2carpros.com/forum/automotive_pictures/416332_1986_pontiac_fiero_code_15_part2_1.jpg

Code 15 is for high signal voltage in the coolant temp sensor circuit.You most likely have a open from the sensor to the ecm.I posted a wire diagram and what the cause for that code is.Let me know what you find.
Aug 18, 2010 at 8:15 PM
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