The P0510 code indicates that the engine control module (ECM) has detected a malfunction in the closed throttle position switch. This means the computer is not receiving the expected signal that the throttle valve is fully closed during idling or deceleration.
The internal circuitry of the sensor or the specific closed-position switch has failed and no longer sends a signal.
Carbon buildup or debris prevents the throttle plate from closing completely, stopping the switch from triggering.
Frayed, broken, or shorted wires in the sensor harness prevent the signal from reaching the ECM.
Moisture or corrosion at the sensor plug creates high resistance or an open circuit.
An internal fault in the engine control module prevents it from processing the switch signal.
Yes, if carbon deposits prevent the butterfly valve from seating fully against the bore, the closed-position switch may not be activated.
No, it is very rare for the PCM to be the cause. Most cases are resolved by cleaning the throttle body or replacing the sensor and repairing wiring.
Generally yes, but the vehicle may exhibit poor idle quality or enter a reduced-power mode to protect the engine.