Archives: DTC Codes

What Does Code P1440 Mean? Diagnostic Trouble Code (DTC) P1440 signifies an issue within the Evaporative Emission Control (EVAP) system, specifically indicating that the EVAP Purge Solenoid Valve is stuck in the open position. The Engine Control Module (ECM) or Powertrain Control Module (PCM) detects this condition by monitoring system pressure/vacuum via the Fuel Tank […]

What Does Code P1441 Mean? DTC P1441 specifically indicates an issue within the Evaporative Emission (EVAP) system related to uncommanded vapor flow during non-purge conditions. This code is unique to General Motors (Chevrolet) vehicles. The Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), monitors the EVAP system to prevent fuel vapors […]

What Does Code P1442 Mean? DTC P1442 signifies an issue within the Evaporative Emission Control System (EVAP) where the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected a leak. Specifically, this code typically points to a small leak, often defined as a leak orifice between 0.020 and 0.040 inches in diameter, depending […]

What Does Code P1443 Mean? The diagnostic trouble code P1443 signifies a detected malfunction within the Evaporative Emission Control (EVAP) System’s Control Valve circuit. This code is typically manufacturer-specific but commonly points to an issue with the EVAP Canister Vent Control Solenoid valve or a similar electrically actuated valve responsible for managing vapor flow or […]

What Does Code P1444 Mean? DTC P1444 signifies a detected “Purge Flow Sensor Circuit Low Input” within the Evaporative Emission Control (EVAP) system. This code indicates that the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), has registered a voltage signal from the EVAP purge flow sensor that is consistently below […]

What Does Code P1445 Mean? DTC P1445, defined as “Purge Flow Sensor Circuit High Input,” indicates that the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), has detected a voltage signal from the Evaporative Emission Control (EVAP) system’s Purge Flow Sensor that is above its expected operating range or a calibrated […]

What Does Code P1446 Mean? The OBD-II diagnostic trouble code P1446 indicates an electrical malfunction within the circuit controlling the Evaporative Emission (EVAP) system’s Vacuum Switching Valve (VSV) or Purge Volume Control Solenoid. This code is typically set when the Engine Control Module (ECM) or Powertrain Control Module (PCM) detects an unexpected electrical condition in […]

What Does Code P1447 Mean? DTC P1447 signifies an Evaporative Loss Control (ELC) System Closure Valve Flow Fault. This code is triggered when the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), detects an anomaly in the expected vapor flow through or past the EVAP system’s closure valve during specific self-diagnostic […]

What Does Code P1448 Mean? The OBD-II diagnostic trouble code P1448 signifies an “EVAP Canister Vent Control Valve (CVCV) System 2 Fault” or similar manufacturer-specific interpretation related to the evaporative emissions control (EVAP) system. In essence, the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), has detected an electrical malfunction or […]

What Does Code P1449 Mean? DTC P1449 indicates an “Evaporative Check Solenoid Circuit Malfunction.” This code is set by the Engine Control Module (ECM) or Powertrain Control Module (PCM) when it detects an electrical fault within the circuit controlling the evaporative check solenoid valve. The ECM/PCM typically monitors the voltage and current draw across the […]