Archives: DTC Codes

What Does Code C1140 Mean? DTC C1140, generally designated as “Hydraulic Base Brake Failure,” indicates a critical malfunction within the vehicle’s Anti-lock Braking System (ABS), Vehicle Stability Control (VSC), or Traction Control System (TCS) hydraulic control unit (HCU). This code is manufacturer-specific, typically found in chassis (C-series) codes, and points to a failure of the […]

What Does Code C1141 Mean? DTC C1141 indicates a specific fault within the Anti-lock Brake System (ABS) module’s monitoring of the Left Front (LF) wheel speed sensor signal. Specifically, it signifies a “Wheel Speed Sensor LF Tone Ring Tooth Missing Fault.” The ABS control module (often integrated into the Electronic Brake Control Module, EBCM, or […]

What Does Code C1142 Mean? DTC C1142 signifies a detected fault with the Right Front (RF) Wheel Speed Sensor (WSS) tone ring, specifically indicating a “tooth missing” or an equivalent anomaly in the signal pattern generated by the tone ring. The Engine Control Module (ECM), or more precisely, the Electronic Brake Control Module (EBCM) / […]

What Does Code C1143 Mean? Diagnostic Trouble Code C1143 indicates a detected fault within the Left Rear (LR) Wheel Speed Sensor Tone Ring system, specifically identifying a “Tooth Missing” condition. The Anti-lock Braking System (ABS) control module, or the integrated Vehicle Dynamics Control (VDC) module, constantly monitors the rotational speed of each wheel via inductive […]

What Does Code C1144 Mean? DTC C1144 is a manufacturer-specific diagnostic trouble code primarily indicating a fault detected within the Anti-lock Braking System (ABS) related to the rear right (RR) wheel speed sensor tone ring. The ABS control module, often integrated with the Powertrain Control Module (PCM) or a standalone ABS module, continuously monitors the […]

What Does Code C1145 Mean? The diagnostic trouble code C1145 signifies a malfunction within the input circuit for the Right Front (RF) wheel speed sensor. This code is typically set by the Anti-lock Braking System (ABS) control module, which serves as the primary processing unit for wheel speed sensor data. The ABS module continuously monitors […]

What Does Code C1146 Mean? DTC C1146 signifies an detected open circuit within the electrical pathway of the Right Front (RF) Wheel Speed Sensor. This code is typically set by the Anti-lock Braking System (ABS) control module, which continuously monitors the electrical integrity and signal output of each wheel speed sensor. An open circuit implies […]

What Does Code C1148 Mean? DTC C1148 signifies a Right Front (RF) Wheel Speed Sensor Coherency Fault detected by the Anti-lock Braking System (ABS) control module. This code indicates that the signal received from the right front wheel speed sensor is inconsistent, erratic, or implausible when compared to expected values or other system inputs. The […]

What Does Code C1149 Mean? Diagnostic Trouble Code C1149 signifies a detected malfunction within the vehicle’s hydraulic fluid pressure and/or flow control circuit. This code is typically associated with the Anti-lock Braking System (ABS), Traction Control System (TCS), or Electronic Stability Program (ESP) modules. The primary control module responsible for monitoring these systems (often the […]

What Does Code C1150 Mean? DTC C1150 signifies a detected fault within the Two Speed Rear Axle Input Switch Circuit, specifically indicating a Short to Vbatt (Vehicle Battery Voltage). This code is primarily relevant in vehicles equipped with a two-speed rear axle system, commonly found in commercial vehicles, medium-duty trucks, or specialized heavy-duty applications. The […]