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Code P0483

Tiny
SUSANMSULC
  • MEMBER
  • 2003 SUBARU IMPREZA
  • 136,000 MILES
Engine light came on although the car seems to be running okay. I was told by a mechanic that it could be cooling system issue; thermostat, radiator leak, hose leak, cooling fan. There seems to be plenty of coolant in the reservoir, but the radiator is a bit low. Or it could be cooling fan relay connector or possibly flush cooling system and replace water pump.

What do you think?
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Tuesday, March 14th, 2017 AT 4:15 PM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 13,494 POSTS
P0483, cooling fan rationality check malfunction. It means that the cooling fan has been commanded to turn on or off, but the ECM did not detect a voltage change that indicated that the fan actually did turn on or off.

Test the cooling fan relay and its circuit. The usual suspect is a bad relay, but it could be the wiring to it.
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Tuesday, March 14th, 2017 AT 7:34 PM

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