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What should I replace? I got the engine code P0121 on my 2008 Chevrolet Malibu 2.4L

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What should I replace? I got the engine code P0121 on my 2008 Chevrolet Malibu 2.4L

Vehicle: 2008 Chevrolet Malibu 2.4L

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P0121 Throttle position sensor 1 performance

Check the MAF (mass airflow) especially the air duct for the MAF or any vacuum leaks that affects the perfromance of the MAF.

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P0121 CHEVROLET Code - Throttle Position Sensor 1 Performance
Read more: https://www.autocodes.com/p0121_chevrolet.html

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