P1519
System
Powertrain (Air Intake)
Scanner required
Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

Intake Manifold Runner Control Stuck Closed (Bank 1)

Understand P1519, common causes, and the right SEAFLO pump to diagnose it.

IMRC flap stuck closed — reduces low-RPM torque on V6/V8 with variable intake.

Common symptoms

  • Rough low-speed running
  • Reduced power below 3000 RPM
  • Check engine light

Typical causes

  • Failed IMRC actuator
  • Carbon binding flap
  • Vacuum supply leak to actuator

What scanner do you need?

Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

Use live data and freeze frame to confirm the fault before replacing parts. ABS, SRS, and network U-codes usually require a full-system scanner.

Diagnostic tips

  • Record freeze frame data when the code first sets
  • Clear the code only after fixing the root cause
  • Check for related pending codes that point to a common issue
  • Verify battery voltage is above 12.4V before chasing sensor codes

Frequently asked questions

Can I diagnose P1519 with a basic code reader?
P1519 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Is it safe to drive with P1519?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.