WOMS
P code powertrain Medium severity

P1517 IMRC Input Error (Bank 2)

The OBD2 code P1517 indicates a malfunction in the Intake Manifold Runner Control (IMRC) system for Bank 2, which affects the operation of the intake manifold's variable runner system

Definition

The OBD2 code P1517 indicates a malfunction in the Intake Manifold Runner Control (IMRC) system for Bank 2, which affects the operation of the intake manifold's variable runner system

Common causes

  • Faulty IMRC (Intake Manifold Runner Control) actuator
  • Damaged or disconnected vacuum lines
  • Faulty IMRC position sensor
  • Wiring issues or short circuits in the IMRC circuit
  • Intake manifold issues
  • Engine control module (ECM) malfunction
  • Carbon buildup in the intake manifold
  • Faulty throttle body or related components

Common misdiagnoses

  • Faulty throttle position sensor (TPS)
  • Vacuum leaks
  • Malfunctioning intake manifold runner control (IMRC) actuator
  • Wiring or connector issues
  • Faulty engine control module (ECM)
  • Incorrectly installed or damaged intake manifold
  • Issues with the mass air flow (MAF) sensor
  • Fuel delivery problems
  • Ignition system faults
  • Exhaust gas recirculation (EGR) system issues

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. Addressing any related codes can help in diagnosing the issue

  2. 2. Inspect the IMRC System

    Visual Inspection: Check the intake manifold and the IMRC actuator for any visible damage, disconnections, or loose wiring

  3. 3. Vacuum Leaks

    Inspect for vacuum leaks in the intake manifold and associated hoses, as these can affect the IMRC operation

  4. 4. Test the IMRC Actuator

    Actuator Functionality: Manually test the IMRC actuator to ensure it is functioning correctly. You can do this by applying vacuum or using a scan tool to command the actuator

  5. 5. Resistance Check

    Measure the resistance of the actuator's electrical connector to ensure it is within specifications

  6. 6. Check Electrical Connections

    Inspect the wiring and connectors related to the IMRC system for corrosion, damage, or loose connections. Repair or replace as necessary

  7. 7. Inspect the Throttle Body

    Ensure that the throttle body is clean and functioning properly. A dirty or malfunctioning throttle body can affect the IMRC system

  8. 8. Check the ECM

    If all other components are functioning correctly, the issue may lie with the engine control module (ECM). Check for software updates or reprogramming if necessary

  9. 9. Clear Codes and Test Drive

    After performing repairs or adjustments, clear the trouble codes and take the vehicle for a test drive to see if the code returns

  10. 10. Professional Diagnosis

    If the issue persists after performing the above steps, consider seeking help from a professional mechanic or technician who has experience with your vehicle's make and model. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the P1517 code