code p0456 reduce power engine

2006 CHEVROLET COBALT
135,000 MILES • 2.2L • 4 CYL • 2WD • AUTOMATIC
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CESARR0907
  • MEMBER
  • 1 POST
My problem start when I changed the cigarette light fuse and after that give me the reduce power engine and the code p0456 the throttle body I change it and the pedal throttle sensor too. the problem continues. if some body knows how resolve that problem let me know because I do not know what to do please.
Jun 2, 2020 at 1:51 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good morning,

Did you verify any voltages from the throttle body to the pedal sensor?

I attached a wiring diagram for you to view. We need to do some basic voltage checks for this issue.

https://www.2carpros.com/articles/reduced-power-limp-mode

https://www.2carpros.com/articles/engine-has-low-power-output

I attached wiring diagrams of the throttle body and the pedal sensor. We need to verify the reference and signal voltages being sent to the ECM.

https://www.2carpros.com/articles/how-to-check-wiring

Roy

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Jun 2, 2020 at 2:49 AM
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