P1222 TOYOTA Possible Causes
- Faulty throttle motor
- Throttle motor wiring harness is open or short-circuited
- Poor electrical connection in the throttle motor circuit
- Faulty throttle valve
- Faulty throttle drive gear
How to Fix P1222 TOYOTA Code?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine light on (or engine warning light soon in service)
P1222 TOYOTA Meaning
The throttle control motor is operated by the engine control module (ECM) and it opens and closes the throttle valve. The fully open condition of the throttle valve is detected by the diesel throttle position switch, which is mounted on the throttle body. If this diagnostic trouble code (DTC) is stored, the engine control module cuts power to the throttle control motor.