it all started when my check engine light came on. i took it to toyota and they told me its the air fuel ratio sensor. before replacing the sensor, i tried taking one of the battery leads of to reset the code. but after i put the battery lead back on. the car started idling rough like it was going to stall. other than that the car runs perfectly. i changed all the spark plugs,oil change, new air fuel ratio sensor, throttle body clean up snd engine coolant flush
why does my car idle rough in the morning for about 25sec on 2001 Toyota Solara
A very common thing on Toyota is that the Idle Air Control motor wears out. It will cause a rough idle, especially in the morning. Sometimes you can clean them but often they have to be replaced. Who did the Air/Fuel ratio sensor? It is absolutely critical to get just the right one. Toyota has factory updated this part so an after market one is risky.
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Check your egr valve