What are the symptoms of a faulty electronic throttle body?
2 Answers
Electronic throttle body failure may cause the engine warning light to illuminate, engine idle shaking and unstable idle, stalling at low speeds, and other phenomena. Here is relevant information: 1. Use a computer diagnostic tool to check the engine module. If there are no permanent fault codes, replacement is generally not required. Read the throttle body's data stream to check the two position sensors and throttle opening. If the opening is large, first clean the carbon deposits on the throttle body, then perform throttle initialization. 2. If the throttle position sensor and motor have poor line contact, open circuit, or short circuit, check the throttle wiring harness connector for rust, water ingress, or widened connector tabs in case of poor contact. For open or short circuits, inspect the related throttle wiring by measuring voltage and circuit continuity.
I had an issue with the electronic throttle when driving last year, and it felt really terrible. Right after starting the car, the yellow engine warning light on the dashboard would immediately come on, which always made me nervous. The engine idled roughly, shaking like it was trembling at red lights. Accelerating was especially difficult—I had to press the gas pedal deep before the car responded sluggishly, and it struggled even more on uphill roads. Cold starts often failed, and it almost stalled several times. I finally took it to the repair shop, and the technician said the throttle position sensor was faulty, causing abnormal voltage. I recommend getting it checked as soon as you notice these signs, or it could drag down overall performance and even increase fuel consumption.
