Question posted by Onthenodd619 on June 20th, 2022

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p2120 code on my 2006 grand prix and p200 misfire multiple cylinders. Changes the plugs wires

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Answer #1: Posted by SonuKumar on June 20th, 2022 9:34 PM
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SonuKumar

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Code P2120 is an indication that the ECM detects a major throttle position failure and is in failure management mode. This has limited the RPM that the engine can go since the throttle control actuator system depends on the pedal position sensor for proper control of the throttle.

https://www.yourmechanic.com/article/p2120-obd-ii-trouble-code-throttle-pedal-position-sensor-switch-d-circuit-by-jay-safford#:~:text=Code%20P2120%20is%20an%20indication,proper%20control%20of%20the%20throttle.

Please respond to my effort to provide you with the best possible solution by using the "Acceptable Solution" and/or the "Helpful" buttons when the answer has proven to be helpful.

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Sonu
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