Archives: DTC Codes

What Does Code P1261 Mean? DTC P1261 signifies a detection by the Powertrain Control Module (PCM) or Engine Control Module (ECM) of a “Cylinder #1 High To Low Side Short” within the fuel injector circuit for cylinder number one. In most modern fuel injection systems, the fuel injectors are supplied with a constant battery voltage […]

What Does Code P1262 Mean? DTC P1262 signifies an electrical fault within the control circuit of the fuel injector for cylinder #2, specifically indicating a “High To Low Side Short.” This means the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), has detected an unintended low-resistance path between the power supply […]

What Does Code P1263 Mean? DTC P1263 signifies that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected an electrical short circuit in the control circuit of the fuel injector for cylinder #3. Specifically, “High To Low Side Short” indicates an unintended low-resistance path between the injector’s power supply (high side) and […]

What Does Code P1264 Mean? The diagnostic trouble code P1264 signifies a detected electrical fault within the fuel injector circuit for cylinder #4, specifically indicating a “High To Low Side Short.” This means the Engine Control Module (ECM) or Powertrain Control Module (PCM) has identified an abnormal electrical path where the high-side driver circuit (typically […]

What Does Code P1265 Mean? DTC P1265 signifies an electrical fault within the fuel injector circuit for Cylinder #5, specifically indicating a “High To Low Side Short.” The Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), is responsible for precisely controlling fuel injector operation by switching the ground path (low side) […]

What Does Code P1266 Mean? DTC P1266 indicates a detected electrical fault within the ignition coil circuit for cylinder #6, specifically identifying a “High To Low Side Short.” This means the Engine Control Module (ECM), also commonly referred to as the Powertrain Control Module (PCM), has identified an unexpected electrical connection or path between the […]

What Does Code P1267 Mean? The diagnostic trouble code (DTC) P1267, “Cylinder #7 High To Low Side Short,” indicates that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected an unintended electrical short circuit between the power supply (high side) and the ground control circuit (low side) for the Cylinder #7 fuel […]

What Does Code P1268 Mean? DTC P1268 signifies an internal electrical malfunction within the circuit controlling the fuel injector for cylinder #8, specifically indicating a “High To Low Side Short.” In modern engine management systems, fuel injectors are typically supplied with a constant battery voltage (the “high side” or power supply) when the ignition is […]

What Does Code P1269 Mean? DTC P1269, “Immobilizer Code Not Programmed,” indicates that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected a discrepancy or an absence of a valid security authentication code from the vehicle’s immobilizer system. This code specifically points to an issue where the immobilizer control unit and the […]

What Does Code P1270 Mean? The diagnostic trouble code P1270 signifies that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected an event where the engine’s Revolutions Per Minute (RPM) or the vehicle’s speed has reached or momentarily exceeded its predetermined, programmed maximum limit. This code is often informational, indicating that a […]