Possible Causes

• Wiring from/to Intake Manifold Valve (N156) faulty
• Intake Manifold Valve (N156) faulty

Possible Solutions

• Open (sig) Check the wiring Check funtkmallty In diagnosis mode
• Check/Replace Intake Manifold Valve (N156)
  • Perform Output Test.
  • Use Scope to check Activation Signal while performing an Output Test.