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1998 Pontiac Sunfire

Tiny
TOMB331
  • MEMBER
  • 1998 PONTIAC SUNFIRE
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 185,000 MILES
I took my car to be inspected and it failed emissions. The code they gave me came up as the coolant temp sensor, which I replaced. My check engine light is still one. I disconnected the battery to see if that would resolve it, which it did not. I let the car idle for 30 minutes, still no change. When I turn the car on, immediately the fan comes on. The gauge on the dash also has not risen at all. I have plenty of coolant.
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Saturday, May 29th, 2010 AT 8:46 AM

1 Reply

Tiny
INTERNETMECHANIC
  • MECHANIC
  • 700 POSTS
I don't know the actual code? Check the circuits at connector, cts. Ref voltage and ground, ref voltage should be 5 volts, use a digital voltmeter. Check ground also. Maybe a problem with wiring circuit? If you use the digital multimeter between the two terminals at the connector, key on, what does it read?
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Saturday, May 29th, 2010 AT 9:53 AM

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