P100B – VVEL 2 Response Malfunction Bank

P100B Code Description

• The VVEL (Variable Valve Event & Lift) system controls the lift and opening of the intake valves.
• It uses a drive shaft, eccentric cams, rocker arms, and linkages to modify valve lift.
• The Engine Control Module (ECM) adjusts the valve lift based on driving conditions.
• The VVEL control module controls the rotation of the control shaft using the VVEL actuator motor.
• The goal is to optimize engine power and response.

Possible Symptoms

• Check Engine light illuminated.

Possible Causes

• Faulty VVEL actuator motor.
• VVEL actuator motor wiring harness open or shorted.
• Poor electrical connection in the VVEL actuator motor circuit.
• Faulty VVEL actuator assembly.
• Faulty VVEL ladder assembly.
• Faulty VVEL control module.

Repair Procedure

1. Visual Inspection:
   • Check the cables and connectors associated with the VVEL actuator motor.
   • Look for signs of damage: frayed wires, corroded connectors, bent or broken pins.
2. Component Verification:
   • If the visual inspection reveals no issues, test the VVEL actuator motor.
   • Check the VVEL actuator assembly.
   • Check the VVEL ladder assembly.
   • Check the VVEL control module.
   • If possible, test wire continuity.