I am the owner of a Toyota Camry LE 2000 and its been running great but for some minor issues which are addressed from time to time. The mileage is about 140K. I have never failed a SMOG Test and this is the 1st time, I was asked to go to a SMOG Test Only Center. I failed the SMOG Test for the first time. The Functional Check shows FAIL. The OBD Fault Code is “PO128 Coolant Temperature Below Thermostat Rating” and “P1780 Manufacturer specific code”. Does anyone know what this means and what it takes to fix the issue?. I also get a “check engine light” and in general the display is misleading (R will show up when I am driving). My mechanic confirmed its a sensor issue and has nothing to do with the engine.
Now I do have a regular mechanic who works at a SMOG check place (not a SMOG Test place) and he is a very honest person but I am not sure if he is authorized to do this repair and so I am looking for some recommendations. I hate to go to a dealer as you never know what they will charge even if we go for a simple oil change. I am in San Jose, CA. TIA for your time and help.