Honda 14-03-p1519- ((hot)) | LATEST → |

The most common symptom. The engine RPM will bounce between 500 and 2,000 RPM while you are stopped at a traffic light. This "hunting" idle occurs because the ECM cannot control the amount of air bypassing the throttle plate.

Honda engines are prone to carbon buildup. The IAC valve contains a small air passage and a plunger. Over time, oil vapor and unburned fuel bake into hard carbon deposits, causing the plunger to stick. This is rarely an electrical failure—it’s a mechanical blockage. honda 14-03-p1519-