What causes a Toyota Camry to run loud at startup?

Depends on the type of noise you're hearing. But as mentioned, cars are programmed to idle high on initial startup, for several reasons. One, to rapidly build oil pressure. Two, to heat the catalytic converter and oxygen sensors up to normal operating temperature as quickly as possible for emissions and efficiency. read more

Depends on the type of noise you're hearing. But as mentioned, cars are programmed to idle high on initial startup, for several reasons. One, to rapidly build oil pressure. read more

Toyota Camry owners have reported 34 problems related to loud engine noise (under the engine and engine cooling category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Toyota Camry based on all problems reported for the Camry. read more