Do throttle body normally make noise?

I have a 2007 Mazda 6 with 150k miles.

It gives  me a code P0506 Idle control system rpm lower than expected.

My car has a electronic throttle body and it makes a buzzing noise for a few seconds after the engine is shut down. Also when I let go the gas pedal while driving it feels a heavy pull back.

What should I check first and potentially replace? Thanks.

1 Answer

  • Anonymous
    1 month ago

    Do a tug test on the wires to the connectors to the throttle body.  Repair the wires or replace the connectors if wires are loose  If wires are ok, check connectors for corrosion and bent pins.  Replace if required.  Reset trouble codes and go for a test drive.

    If everything looks good on inspection, replace throttle body.

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