One problem related to diesel engine has been reported for the 2010 Toyota Camry. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2010 Toyota Camry based on all problems reported for the 2010 Camry.
A knock or rattle noise, coming from engine compartment, is heard during a cold startup, sounds like a diesel engine. I have taken it in for every oil change when it is due, and no different. It has been this way ever since I bought it.