Archives: DTC Codes

What Does Code P1863 Mean? DTC P1863 indicates a Transmission Transfer Case Contact Plate Power Open Circuit. This diagnostic trouble code signifies that the Powertrain Control Module (PCM), or in some vehicle architectures, a dedicated Transfer Case Control Module (TCCM), has detected an open circuit condition within the electrical supply path to the transfer case […]

What Does Code P1864 Mean? DTC P1864 signifies a detected condition where the Powertrain Control Module (PCM), or in some applications the Transfer Case Control Module (TCCM), has identified an unintended electrical short to battery voltage within the circuit supplying power to the transmission transfer case contact plate. The transfer case contact plate is typically […]

What Does Code P1865 Mean? DTC P1865 signifies a detected Transmission Transfer Case Contact Plate Power Short To Ground. This diagnostic trouble code specifically indicates that the Powertrain Control Module (PCM), or in some applications, a dedicated Transfer Case Control Module (TCCM), has identified an unintended low-resistance path to chassis ground on the power supply […]

What Does Code P1866 Mean? Diagnostic Trouble Code (DTC) P1866 signifies a detected malfunction within the vehicle’s transfer case control system. Specifically, it generally indicates that the Powertrain Control Module (PCM) or a dedicated Transfer Case Control Module (TCCM) has identified an inconsistent, absent, or out-of-range electrical signal from a component responsible for monitoring or […]

What Does Code P1867 Mean? DTC P1867 signifies a “Transmission Transfer Case Contact Plate General Circuit Failure.” This code is set when the Powertrain Control Module (PCM) or, more commonly, the Transfer Case Control Module (TCCM) detects an electrical anomaly within the circuit associated with the transfer case’s internal contact plate. The contact plate is […]

What Does Code P1868 Mean? The diagnostic trouble code (DTC) P1868 signifies a detected electrical malfunction within the circuit controlling the 4-Wheel Drive (4WD) indicator lamp, typically located in the vehicle’s instrument cluster. This code is set by the Powertrain Control Module (PCM), or in some vehicle architectures, a dedicated Transfer Case Control Module (TCCM) […]

What Does Code P1869 Mean? DTC P1869 indicates a specific electrical fault within the control circuit of the Automatic 4-Wheel Drive (A4WD) indicator lamp. The designation “Short To Battery” signifies that the Powertrain Control Module (PCM) or a dedicated Four-Wheel Drive Control Module (4WDCM) has detected a voltage level on this circuit that is consistently […]

What Does Code P1870 Mean? DTC P1870 signifies a detected malfunction within the transmission system, most commonly indicating an excessive slip condition within the Torque Converter Clutch (TCC) circuit or, in some specific applications, an issue with the Transmission Mechanical Transfer Case 4×4 Switch Circuit. For many domestic vehicles, particularly General Motors applications, P1870 is […]

What Does Code P1871 Mean? DTC P1871 signifies a “Transmission Mechanical Transfer Case 4×4 Switch Circuit Short To Battery.” This code indicates that the Powertrain Control Module (PCM), or in some architectures, the Transfer Case Control Module (TCCM), has detected an anomalous voltage condition on the electrical circuit connected to the mechanical 4×4 transfer case […]

What Does Code P1872 Mean? DTC P1872, defined as “Transmission Mechanical 4-Wheel Drive Axle Lock Lamp Circuit Failure,” indicates an electrical malfunction within the control circuit of the four-wheel drive (4WD) axle lock indicator lamp. This lamp, typically located on the vehicle’s instrument cluster or a dedicated 4WD control panel, is designed to illuminate when […]