Archives: DTC Codes

What Does Code P1271 Mean? DTC P1271 signifies a detected “Cylinder #1 High To Low Side Open” condition, indicating an open circuit within the control path for the #1 fuel injector. This code is typically set by the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), when it commands the #1 […]

What Does Code P1272 Mean? The diagnostic trouble code P1272, “Cylinder #2 High To Low Side Open,” indicates that the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), has detected an open circuit condition in the primary control circuit for the ignition coil of cylinder number 2. In most modern ignition […]

What Does Code P1273 Mean? DTC P1273 signifies that the Engine Control Module (ECM), also commonly referred to as the Powertrain Control Module (PCM), has detected an open circuit condition within the electrical circuit of the fuel injector for cylinder #3. In modern engine management systems, the ECM actively monitors the electrical characteristics of critical […]

What Does Code P1274 Mean? The diagnostic trouble code P1274 signifies a “Cylinder #4 High To Low Side Open” condition. This code specifically points to an electrical fault within the fuel injector circuit for cylinder number four. The Engine Control Module (ECM), also commonly referred to as the Powertrain Control Module (PCM), is responsible for […]

What Does Code P1275 Mean? DTC P1275 indicates that the Powertrain Control Module (PCM), also referred to as the Engine Control Module (ECM), has detected an open circuit condition in the high-side to low-side control circuit for the fuel injector of cylinder #5. In internal combustion engine management systems, fuel injectors are typically controlled by […]

What Does Code P1276 Mean? The diagnostic trouble code P1276 signifies an open circuit detected in the electrical control circuit for the #6 fuel injector. Specifically, the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), monitors the electrical integrity and current flow through each fuel injector circuit. When P1276 is set, […]

What Does Code P1277 Mean? The diagnostic trouble code P1277 indicates an “open circuit” condition detected by the Engine Control Module (ECM) or Powertrain Control Module (PCM) within the fuel injector control circuit for Cylinder #7. Specifically, “High To Low Side Open” signifies that the ECM/PCM is commanding the injector for cylinder #7 to operate […]

What Does Code P1278 Mean? DTC P1278 signifies an electrical open circuit condition detected in the fuel injector circuit for cylinder number 8. The Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), is responsible for precisely timing and actuating each fuel injector by providing a brief ground pulse to complete the […]

What Does Code P1280 Mean? DTC P1280 signifies an Injection Control Pressure (ICP) Out Of Range Low condition. This code is specifically pertinent to diesel engines utilizing a high-pressure oil pump (HPOP) and hydraulically activated electronically controlled unit injectors (HEUI) or similar common rail systems where engine oil pressure is critical for fuel injection. The […]

What Does Code P1281 Mean? Diagnostic Trouble Code P1281 indicates that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected an injection control pressure (ICP) reading that is excessively high, exceeding a calibrated maximum threshold or significantly above the desired pressure value, for a specified period or under certain operating conditions. In […]