Archives: DTC Codes

What Does Code C1849 Mean? The diagnostic trouble code C1849 signifies a detected fault within the master cylinder pressure circuit, specifically indicating that the reported pressure value is “out of range.” This code is set when the Anti-lock Brake System (ABS) module, or sometimes the Powertrain Control Module (PCM) or other related control unit, receives […]

What Does Code C1850 Mean? DTC C1850 indicates an electrical malfunction within the circuit responsible for illuminating the Air Suspension Warning Lamp on the vehicle’s instrument cluster. This code is typically set by the Air Suspension Control Module (ASCM) or a Body Control Module (BCM) that manages the air suspension system. The control module continuously […]

What Does Code C1851 Mean? DTC C1851 signifies an detected open circuit within the electrical pathway responsible for illuminating the air suspension system’s dedicated warning lamp. The Air Suspension Control Module (ASCM) or Suspension Control Module (SCM), depending on the vehicle manufacturer, is the primary electronic control unit (ECU) responsible for managing the air suspension […]

What Does Code C1852 Mean? DTC C1852 signifies a detected short circuit to battery voltage within the air suspension warning lamp circuit. In essence, the Air Suspension Control Module (ASCM) or Suspension Control Module (SCM) is monitoring the electrical path for the dashboard warning lamp dedicated to the air suspension system. When the ASCM/SCM expects […]

What Does Code C1853 Mean? Diagnostic Trouble Code (DTC) C1853 indicates that the vehicle’s Air Suspension Control Module (ASCM), or in some integrated systems, the Body Control Module (BCM) or Powertrain Control Module (PCM), has detected an electrical short circuit to ground within the dedicated circuit controlling the air suspension system’s warning lamp in the […]

What Does Code C1854 Mean? DTC C1854 is a chassis diagnostic trouble code (DTC) specifically indicating an “Out of Range” condition for an electric motor’s temperature sensor. While the exact motor can vary by manufacturer and vehicle application, in many modern vehicles, this code frequently pertains to the Electric Power Steering (EPS) motor or, in […]

What Does Code C1855 Mean? The diagnostic trouble code C1855 signifies an “Acceleration Position Sensor Conflict” detected by the vehicle’s Powertrain Control Module (PCM), Engine Control Module (ECM), or an integrated module responsible for driver input interpretation. In modern drive-by-wire (DBW) systems, the Accelerator Pedal Position (APP) sensor assembly is a critical component that translates […]

What Does Code C1856 Mean? The diagnostic trouble code C1856, “Traction Motor Encoder Circuit Failure,” specifically indicates a detected malfunction within the electrical circuit of the traction motor encoder. In hybrid and electric vehicles, the traction motor encoder, often a resolver or a Hall-effect sensor, is a critical component responsible for accurately measuring the rotational […]

What Does Code C1859 Mean? The C1859 diagnostic trouble code indicates that the Powertrain Control Module (PCM) or Transmission Control Module (TCM) has detected an electrical malfunction within the circuit for the secondary PRNDL (Park, Reverse, Neutral, Drive, Low) input signal. Unlike a primary PRNDL input, “Input #2” often refers to a redundant signal path, […]

What Does Code C1860 Mean? The diagnostic trouble code C1860, “PRNDL Input #3 Circuit Failure,” indicates that the Powertrain Control Module (PCM) or Transmission Control Module (TCM) has detected an electrical fault within a specific circuit associated with the transmission range sensor (also commonly referred to as the neutral safety switch or PRNDL switch). The […]