Archives: DTC Codes

What Does Code P1883 Mean? DTC P1883 signifies an electrical fault within the Engine Coolant Level (ECL) switch circuit, as detected by the Generic Electronic Module (GEM) or an integrated Body Control Module (BCM), which then typically reports to the Powertrain Control Module (PCM). This code is manufacturer-specific, commonly found in Ford vehicles. The GEM/BCM […]

What Does Code P1884 Mean? DTC P1884 signifies that the Powertrain Control Module (PCM), or Engine Control Module (ECM) on some vehicle platforms, has detected a persistent electrical short-to-ground condition within the dedicated output circuit responsible for illuminating the Engine Coolant Level Warning Lamp. This warning lamp, typically located within the instrument cluster, is designed […]

What Does Code P1885 Mean? DTC P1885 indicates that the Powertrain Control Module (PCM) or Transfer Case Control Module (TCCM) has detected a short circuit to ground in the electrical circuit for the Transfer Case Disengaged Solenoid. This solenoid is a crucial component within the transfer case system, responsible for electrically engaging or disengaging the […]

What Does Code P1886 Mean? DTC P1886 signifies a 4X4 Initialization Failure, indicating that the vehicle’s Four-Wheel Drive Control Module (4WDCM), often referred to as the Transfer Case Control Module (TCCM), has detected an anomaly during its self-initialization sequence or a commanded mode change. This code is logged when the module fails to verify the […]

What Does Code P1890 Mean? The diagnostic trouble code P1890 signifies a detected fault within the Transmission 4WD Mode Select Return Input Circuit. This code indicates that the Powertrain Control Module (PCM) or a dedicated Transfer Case Control Module (TCCM), responsible for managing the vehicle’s four-wheel-drive (4WD) or all-wheel-drive (AWD) system, has identified an electrical […]

What Does Code P1891 Mean? DTC P1891 signifies a “Transmission Transfer Case Contact Plate Ground Return Open Circuit.” This code indicates that the Powertrain Control Module (PCM) or, more commonly, the Transfer Case Control Module (TCCM), has detected an open circuit condition in the ground return path for the transfer case’s internal contact plate. The […]

What Does Code P1900 Mean? DTC P1900 signifies an intermittent malfunction within the Output Shaft Speed (OSS) sensor circuit. The Output Shaft Speed sensor is a critical inductive or Hall-effect sensor typically located on the transmission’s output shaft, responsible for reporting the rotational speed of the transmission’s output to the Powertrain Control Module (PCM), also […]

What Does Code P1901 Mean? DTC P1901 signifies an intermittent malfunction within the Turbine Speed Sensor (TSS) circuit. The Turbine Speed Sensor, also frequently referred to as the Transmission Input Speed Sensor (TISS) or Input Shaft Speed Sensor (ISS), is a critical component responsible for monitoring the rotational speed of the transmission’s input shaft, which […]

What Does Code P1902 Mean? DTC P1902 signifies an detected intermittent short circuit within the control circuit of Pressure Control Solenoid “B” (PCS “B”) by the Powertrain Control Module (PCM), or in some applications, the Transmission Control Module (TCM). In modern automatic transmissions, Pressure Control Solenoids are electro-hydraulic actuators responsible for regulating transmission line pressure […]

What Does Code P1903 Mean? DTC P1903, in the context of most vehicle manufacturers, signifies a detected electrical short circuit within the control circuit of Pressure Control Solenoid “C”. This is a manufacturer-specific code, meaning its precise interpretation and application may vary slightly between vehicle makes and models, though the fundamental issue remains consistent. In […]