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2005 Nissan Sentra Question: check engine code reads Catalytic running too cold and engine running too cold.



Denster1, San Dimas, CA, August 15, 2013, 18:10

my mechanic says it might be that since the thermostat may be stuck in open position, the catalytic converter may not be registering hot enough to work effectively. Is this possible??

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  • Answer #1

    Justin Case Auto from Justin Case Automotive Repair, Inc., August 16, 2013, 07:27

    90% it's a stuck open thermostat. Have the mechanic plug in the scanner and see what the coolant temperature is getting up to. Should be above 190 degrees while driving.

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    Denster1, August 16, 2013, 12:49

    Thank you! I'll have him check it and let you know! Thanks, again. ~ Dennis

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