Archives: DTC Codes

What Does Code P1189 Mean? DTC P1189 signifies a detected fault in the “Pump Speed Signal,” indicating that the Engine Control Module (ECM), often referred to as the Powertrain Control Module (PCM), has identified an anomaly in the feedback or expected operational parameters of a critical pump within the vehicle system. While the specific pump […]

What Does Code P1190 Mean? The diagnostic trouble code P1190, “Calibration Resistor Out Of Range,” indicates that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected an electrical resistance value from a specific calibration resistor that falls outside its pre-programmed operational parameters. This calibration resistor is typically a fixed-value component integrated into […]

What Does Code P1191 Mean? DTC P1191 is a manufacturer-specific diagnostic trouble code indicating an improper voltage level detected by the Powertrain Control Module (PCM), also commonly referred to as the Engine Control Module (ECM), on a specific circuit designated as the “Key Line Voltage.” This code does not refer to the battery voltage supplied […]

What Does Code P1192 Mean? DTC P1192 is a manufacturer-specific diagnostic trouble code that typically indicates an issue with the voltage signal from an external sensor circuit, most commonly the Fuel Pressure Sensor Circuit Low Input. The Engine Control Module (ECM) or Powertrain Control Module (PCM) monitors the voltage signal from the fuel pressure sensor, […]

What Does Code P1193 Mean? DTC P1193 signifies an EGR Drive Overcurrent condition within the Exhaust Gas Recirculation (EGR) system circuit. This is a manufacturer-specific code, but its interpretation consistently points to an electrical fault in the control circuit of the EGR valve. The Engine Control Module (ECM) or Powertrain Control Module (PCM) is designed […]

What Does Code P1194 Mean? DTC P1194 indicates an internal malfunction of the Engine Control Unit (ECU) or Powertrain Control Module (PCM) related to its Analog-to-Digital (A/D) converter. The A/D converter is a critical component within the ECU responsible for transforming the continuous analog voltage signals received from various engine sensors (such as the Manifold […]

What Does Code P1195 Mean? DTC P1195 indicates that the Powertrain Control Module (PCM), also known as the Engine Control Module (ECM) in some architectures, has detected a failure in the initialization or communication with a specific module identified as the Hybrid Body Controller Communication (HBCC) module over the Standard Corporate Protocol (SCP) data bus. […]

What Does Code P1196 Mean? Diagnostic Trouble Code (DTC) P1196 signifies that the Powertrain Control Module (PCM), also known as the Engine Control Module (ECM), has detected an abnormally high voltage condition on a specific circuit when the ignition key is in the “OFF” position. This “Key Off Voltage High” condition typically indicates that a […]

What Does Code P1197 Mean? DTC P1197 signifies that the Powertrain Control Module (PCM), or in some cases the Engine Control Module (ECM), has detected a voltage level lower than a specified calibrated threshold when the ignition is in the “OFF” position. This code, often manufacturer-specific, indicates a condition where the critical continuous battery voltage […]

What Does Code P1198 Mean? DTC P1198, identified as “Pump Rotor Control Underfueling,” indicates that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected a critical discrepancy in the commanded versus actual fuel delivery from the high-pressure fuel injection pump. This code is most commonly associated with diesel engines utilizing a common […]