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Q:

what is code po 446 and po115 on 1999 Toyota Camry

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
engine light on
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Check, http://www.obd-codes.com/p0446
P0446 is Evaporative Emmission Control System Vent Control Circuit
P0115 Engine Coolant Temperature Circuit Malfunction Trouble, check the coolant level but it could be a bad coolant temperature switch that reports engine coolant temperature to the computer or its associated wiring.
For more detailed tests there is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online