What does it mean?
P0510 is a generic code trouble code with the definition “Closed Throttle Position (CTP) switch – circuit malfunction.” Typically, P0510 is triggered by an open or short in the CTP sensor or a closed throttle position switch that does not engage when the vehicle is in motion. The effect is that when there is a failure of the throttle to engage, the PCM cannot tell the exact position of the throttle and may assume that it is wide open.
This will cause the sensor to send the wrong air/ratio to the PCM, triggering the code. The throttle is located between the air intake system and intake manifold. It monitors and controls airflow into the engine cylinder. Its body works like a valve and regulates airflow by opening when air is needed and closing when it is not required. For combustion, the engine has to mix fuel with air properly. The more air that goes into the engine system; the more power produced by the engine.
The driver can control the airflow into the engine through the gas pedal. A closed throttle occurs with a partial or fully closed throttle valve. This allows for a drop in the airflow going into the engine, reducing the engine’s power before the throttle valve is closed completely. To properly troubleshoot this trouble code, begin by checking for openings in the harness or ECM. Make sure that there is a good connection to the sensor.
If it’s good, the problem may be the sensor, and it will need to be replaced. Next check the wiring connection between the TPS and the ECM, inspect the wiring properly and repair all broken connections. The ECM may be damaged and need replacement and reprogramming in worse cases.