Archives: DTC Codes

What Does Code P1508 Mean? The diagnostic trouble code P1508 signifies that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected an “open circuit” within the electrical control pathway of the Idle Control System. This code specifically points to an issue where the ECM is unable to establish proper electrical communication or […]

What Does Code P1509 Mean? Diagnostic Trouble Code (DTC) P1509 indicates that the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), has detected an electrical short circuit within the Idle Air Control (IAC) system’s circuit. The IAC system is crucial for regulating engine idle speed by precisely controlling the amount of […]

What Does Code P1510 Mean? DTC P1510 signifies an “Idle Signal Circuit Malfunction.” This code indicates that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected an electrical anomaly or an inability to properly control the engine’s idle speed. The “idle signal” refers to the ECM’s command and feedback loop concerning the […]

What Does Code P1513 Mean? DTC P1513 indicates that the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), has detected an anomaly within the Intake Manifold Runner Control (IMRC) system for Bank 2, specifically indicating that the intake manifold runner flaps are stuck in the closed position. The IMRC system is […]

What Does Code P1515 Mean? DTC P1515, commonly interpreted as “Electric Current Circuit Malfunction,” indicates that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected an irregular or unexpected current draw within a specific monitored electrical circuit. While the exact circuit can vary by manufacturer and vehicle model, for many applications, particularly […]

What Does Code P1533 Mean? DTC P1533 indicates an “Air Assist Injection (AAI) System Circuit Malfunction.” This code signifies that the Powertrain Control Module (PCM), also commonly referred to as the Engine Control Module (ECM), has detected an electrical fault within the circuit controlling the Air Assist Injection system. The AAI system is employed in […]

What Does Code P1537 Mean? DTC P1537 indicates that the Engine Control Module (ECM), often referred to as the Powertrain Control Module (PCM), has detected an anomaly in the operation of the Intake Manifold Runner Control (IMRC) system for Bank 1, specifically identifying that the runners are “Stuck Open.” The IMRC system is an electro-mechanical […]

What Does Code P1565 Mean? DTC P1565, or “Speed Control Command Switch Out of Range High,” indicates that the Powertrain Control Module (PCM) or Engine Control Module (ECM) has detected an anomalous electrical signal from the vehicle’s cruise control command switch circuit. The cruise control system typically operates by sending varying voltage signals to the […]