Code P0201 on the 2024 Hyundai Tucson indicates a malfunction in the fuel injector circuit for cylinder 1. This electrical fault prevents proper fuel delivery to that cylinder, causing misfire-like symptoms and affecting engine performance.
Fuel Injector Operation
Each cylinder has a dedicated fuel injector controlled by the ECM. The ECM provides ground pulses to open the injector for precisely calculated durations. When the circuit has issues - open, shorted, or high resistance - the injector cannot deliver proper fuel amounts.
P0201 Symptoms
With cylinder 1 not receiving proper fuel, expect symptoms similar to a misfire: rough idle, hesitation, reduced power, and possible shaking at idle. The check engine light illuminates, and you may notice a companion P0301 misfire code since the cylinder cannot fire properly without fuel.
Common Causes
Faulty fuel injector (open or shorted coil) is common. Damaged wiring to the injector from heat exposure or physical damage affects circuit integrity. Connector corrosion or loose connection prevents proper signal. ECM driver circuit failure is less common but possible.
Diagnostic Approach
Test injector resistance and compare to specification. Check for power at the injector connector and verify ECM ground pulse. Inspect wiring from ECM to injector. Swap injector with another cylinder to determine if the problem follows the injector or stays at cylinder 1.