Archives: DTC Codes

What Does Code P1833 Mean? DTC P1833 signifies a detected “Transmission Transfer Case Differential Lock-Up Solenoid Open Circuit”. This code is set when the Powertrain Control Module (PCM) or Transmission Control Module (TCM) monitors the electrical circuit for the transfer case differential lock-up solenoid and detects a break in continuity or excessively high resistance, indicating […]

What Does Code P1834 Mean? Diagnostic Trouble Code (DTC) P1834 signifies that the Powertrain Control Module (PCM), or in some specific four-wheel-drive (4WD) applications, the Transfer Case Control Module (TCCM), has detected an electrical short circuit to battery voltage (B+) within the control circuit for the Transmission Transfer Case Differential Lock-Up Solenoid. This solenoid is […]

What Does Code P1835 Mean? DTC P1835 signifies a detected short circuit to ground within the electrical control circuit of the Transmission Transfer Case Differential Lock-Up Solenoid. The Powertrain Control Module (PCM), or in some vehicles, a dedicated Transfer Case Control Module (TCCM), continuously monitors the electrical characteristics of components critical to the transfer case […]

What Does Code P1836 Mean? DTC P1836 signifies a detected malfunction within the circuit of the Transmission Transfer Case Front Shaft Speed Sensor. This specific sensor, often an inductive or Hall-effect type, is responsible for monitoring the rotational speed of the front output shaft of the transfer case. The Engine Control Module (ECM) or Powertrain […]

What Does Code P1837 Mean? DTC P1837 signifies a fault within the circuit of the Transmission Transfer Case Rear Shaft Speed Sensor. This code is specifically triggered when the Powertrain Control Module (PCM) or Transfer Case Control Module (TCCM) detects an electrical anomaly within the sensor’s circuit, implying that the signal it receives is either […]

What Does Code P1838 Mean? DTC P1838 signifies a detected electrical malfunction within the circuit controlling the transfer case shift motor. This code is typically triggered by the Powertrain Control Module (PCM) or, more commonly, the Transfer Case Control Module (TCCM), which monitors the voltage, current, and resistance characteristics of the shift motor circuit. The […]

What Does Code P1839 Mean? DTC P1839 signifies an Open Circuit in the Transmission Transfer Case Shift Motor circuit. This diagnostic trouble code is set when the Powertrain Control Module (PCM) or Transfer Case Control Module (TCCM) detects an interruption in the electrical current path to or through the transfer case shift motor. The transfer […]

What Does Code P1840 Mean? DTC P1840 signifies a detected “Transmission Transfer Case Shift Motor Short Circuit To Battery.” This diagnostic trouble code is set when the Powertrain Control Module (PCM), or more commonly, the dedicated Transfer Case Control Module (TCCM), detects an unexpected and persistent voltage level on the circuit controlling the transfer case […]

What Does Code P1841 Mean? DTC P1841 indicates that the Powertrain Control Module (PCM) or Transfer Case Control Module (TCCM) has detected a short circuit to ground within the electrical circuit of the transfer case shift motor. This code specifically points to an unintended path for electrical current from the shift motor’s power or control […]

What Does Code P1842 Mean? DTC P1842 indicates a detected malfunction within the electrical circuit of the Transmission Transfer Case Differential Lock-Up Feedback Switch. In vehicles equipped with a transfer case for 4-wheel drive (4WD) or all-wheel drive (AWD) systems, a differential lock-up mechanism is often employed to ensure power is distributed equally to both […]