Question about 1995 Nissan Maxima
Check the temperature of the hose on both sides of the heater control valve if it is the same than the heater control valve is working. You could check the hose going in and the one coming out to see if the temperature feels the same. If one is hot and the other is cold than you have a clogged heater core and you need to flush the cooling system. Also a bad radiator cap could keep the heat from being wrong. Let the car run for awhile and squeeze the top radiator hose and see if the hose is tight, In other words you can't squeeze the hose together. If you can squeeze it than replace the cap.
Posted on Jan 02, 2011
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Posted on Jan 02, 2017
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HO2S-12 (Bank 1 Sensor 2) Heater Circuit Malfunction
HO2S heater control circuit is open or shorted to ground.HO2S heater control circuit is shorted to power.HO2S heater is damaged or has failed.PCM has failed.
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