Originally Posted by
john19999
Whatif I keep driving navigator with P0125 code (bad thermostat - temperature low). The heater is working quite fine and gauage shows about 20% above cold. Is there any harm to Engine if I keep driving navigator?
Thanks
John
Yes. The engine will stay in open-loop warm-up mode longer than it should. This will waste fuel, raise emissions, and increase the possibility of damaging the cats from excessive raw fuel.