Archives: DTC Codes

What Does Code P1518 Mean? DTC P1518 stands for Intake Manifold Runner Control (IMRC) System Stuck Open. This code indicates that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected that the intake manifold runner control system’s flaps or valves are in a permanently open position when conditions dictate they should be […]

What Does Code P1519 Mean? DTC P1519 signifies an issue with the Intake Manifold Runner Control (IMRC) system, specifically indicating that the runners are detected as being stuck in the closed position. The IMRC system is a sophisticated component designed to optimize engine performance across various RPM ranges by altering the length of the intake […]

What Does Code P1520 Mean? DTC P1520 signifies an Intake Manifold Runner Control (IMRC) Circuit Malfunction. This code is triggered by the Engine Control Module (ECM) or Powertrain Control Module (PCM) when it detects an electrical fault within the control circuit responsible for operating the intake manifold runner control system. The IMRC system is designed […]

What Does Code P1521 Mean? The diagnostic trouble code P1521 signifies a detected electrical circuit malfunction within the Variable Intake Solenoid #1 system. This system, often referred to as a Variable Resonance Induction System (VRIS), Variable Intake Manifold (VIM), or similar depending on the manufacturer, is designed to optimize engine volumetric efficiency and torque output […]

What Does Code P1522 Mean? DTC P1522 indicates a detected malfunction within the electrical circuit of Variable Intake Solenoid #2. This code is typically set when the Engine Control Module (ECM) or Powertrain Control Module (PCM) monitors the voltage, resistance, or current flow within the control circuit for Variable Intake Solenoid #2 and identifies a […]

What Does Code P1523 Mean? DTC P1523 signifies an Intake Valve Control (IVC) Solenoid Circuit Malfunction. This code indicates that the Engine Control Module (ECM), also referred to as the Powertrain Control Module (PCM), has detected an electrical fault within the circuit controlling the IVC solenoid. The IVC system is typically employed by manufacturers to […]

What Does Code P1524 Mean? The diagnostic trouble code P1524 indicates a malfunction within the Variable Intake Solenoid System. This code is specifically triggered by the Powertrain Control Module (PCM), also referred to as the Engine Control Module (ECM), when it detects an electrical or performance issue related to the solenoid responsible for controlling the […]

What Does Code P1525 Mean? DTC P1525 typically signifies a malfunction within the Air Bypass Valve System. This code is manufacturer-specific, but generally refers to an electronically controlled valve or system designed to regulate secondary airflow paths or modify intake manifold dynamics to optimize engine performance across various operating conditions. In many applications, particularly Nissan, […]

What Does Code P1526 Mean? DTC P1526 signifies a detected malfunction within the vehicle’s Intake Manifold Runner Control (IMRC) system, often generically referred to as the “Air Bypass System” by certain manufacturers. This system is crucial for optimizing engine volumetric efficiency across varying RPM ranges by altering the effective length of the intake manifold runners. […]

What Does Code P1527 Mean? DTC P1527 signifies an detected electrical malfunction within the circuit of the “Accelerate Warmup Solenoid.” While the specific function and nomenclature of this solenoid can vary significantly between manufacturers, its primary purpose is consistent: to expedite the engine’s warm-up process, particularly during cold starts. This accelerated warm-up is crucial for […]