P100A Possible Causes
- Faulty VVEL actuator motor
- VVEL actuator motor harness open or shorted
- VVEL actuator motor circuit poor electrical connection
- Faulty VVEL actuator assembly
- Faulty VVEL ladder assembly
- Faulty VVEL control module
How to Fix P100A Code?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
Engine light on (or service engine soon warning light)
P100A Description
VVEL (Variable Valve Event & Lift) is a system that continuously controls valve event and lift. The rotational movement of the drive shaft equipped with an eccentric cam is transmitted to the output cam via the rocker arm and two types of links to push the intake valve. The engine control module (ECM) determines the target valve lift based on driving conditions and sends the control signal to the VVEL control module. The VVEL control module controls the rotation of the control shaft using the VVEL actuator motor and changes the output cam movement by shifting the link support point. As a result, valve lift continuously changes to improve engine power and response.