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Nissan 200SX

Why would a 1997 200SX SE-R temperature gauge drop to zero with the car in motion and the heater fan on low?


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Wiki User
2006-08-31 08:40:46
2006-08-31 08:40:46

It could be a short on the guage pod, a blown fuse all by itself... Could also be a bad temperature sending unit (burnt out or lost contact) Could also be an ECU problem... I would have it diagnosed by the dealer or buy/find a Factory Service Manual and attempt to check the wiring via the wiring diagram in the FSM. I had my guages go dead when someone installed a new header of all things.... it was a fuse. Hope that helps a little....

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Temperature gauge may drop when heater turned on because additional coolant from heater core is introduced to cooling system - usually this coolant is cooler than what is currently circulating

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My Altima had that problem and it was the water pump going out. It started with temperature gauge was moving, but then it started leaking and finally the heater stopped being warm at idle.

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I own a 95 200SX SE and it sits around cool range. Below half on the guage. I would say its either the thermostat, Rad has a plug somewhere, or the water pump is weak.


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