The Throttle Position Sensor can get out of adjustment due to wear in the throttle body or due to carbon build up. This will cause the idle timing to advance more than 30 degrees which will cause very high HC and NOx emissions. Conversely, the Throttle Position Sensors can wear out and not properly advance the timing which causes a lack of power and poor fuel economy.
Driveability Concerns Due to Throttle Position Sensor Out of Adjustment on Toyota Avalon
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...it picks up speed again. FYI: the check engine light is on and it was diagnose to be due to a knock sensor which I plan to replace as soon as i get money. What might be causing the problem?
just bought the car..engine light come on..code read egr..i think it was #401...enyway i put a...
Sludge can build up in the engine because Toyota did not recommend frequent enough oil changes....
can anyone answer this please,