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P1508 – Infiniti DTC

Infiniti DTC P1508 – IAC System RPM Low

DTC P1508 meaning on Infiniti

  1. DTC P1508 indicates that the Idle Air Control (IAC) system RPM is lower than expected on an Infiniti vehicle.
  2. The Engine Control Module (ECM) monitors the IAC system to ensure proper engine idle speed control.

Infiniti DTC P1508 symptoms

  • Engine may idle roughly or stall.
  • Vehicle may experience poor acceleration.
  • Check Engine Light (CEL) may illuminate on the dashboard.

Infiniti DTC P1508 causes

  • Dirty or faulty Idle Air Control (IAC) valve.
  • Vacuum leaks in the intake system.
  • Faulty throttle body.
  • Issues with the ECM.

Infiniti DTC P1508 seriousness

  1. If left unresolved, DTC P1508 can lead to poor engine performance and potential stalling, which may compromise vehicle safety.
  2. It is recommended to address this issue promptly to prevent further damage to engine components.

How to diagnose DTC P1508 on Infiniti

  1. Use a scan tool to retrieve the DTC and freeze frame data.
  2. Inspect the IAC valve for dirt or carbon buildup.
  3. Check for vacuum leaks in the intake system.
  4. Test the throttle body for proper operation.
  5. Verify the ECM functionality.

How to fix DTC P1508 on Infiniti

  1. Clean or replace the Idle Air Control (IAC) valve if dirty or faulty.
  2. Repair any vacuum leaks in the intake system.
  3. Replace the throttle body if found to be defective.
  4. If necessary, reprogram or replace the ECM.

How to erase DTC P1508 on Infiniti

  1. After addressing the root cause of DTC P1508, use a scan tool to clear the code from the ECM memory.
  2. Ensure that the repair has resolved the issue before clearing the code.

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← All Infiniti Diagnostic Trouble Codes

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