Archives: DTC Codes

What Does Code P1282 Mean? The OBD-II diagnostic trouble code P1282, “Excessive Injection Control Pressure,” indicates that the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), has detected an Injection Control Pressure (ICP) that is significantly higher than the desired or specified maximum operational limit for the engine’s high-pressure oil system. […]

What Does Code P1283 Mean? The diagnostic trouble code P1283 indicates a detected electrical malfunction within the Injector Pressure Regulator (IPR) control circuit. The Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), monitors the electrical characteristics of the IPR valve’s solenoid circuit. In systems utilizing Hydraulically-actuated Electronic Unit Injectors (HEUI) or […]

What Does Code P1284 Mean? DTC P1284 signifies an Aborted KOER – ICP Failure. This diagnostic trouble code is primarily associated with Ford Power Stroke diesel engines (e.g., 7.3L, 6.0L, 6.4L) and other International (Navistar) engines that utilize a High-Pressure Oil Pump (HPOP) system to actuate their fuel injectors. The Key On Engine Running (KOER) […]

What Does Code P1285 Mean? DTC P1285 signifies that the Powertrain Control Module (PCM), or Engine Control Module (ECM) in certain vehicle architectures, has detected an excessively high temperature within one or more cylinder heads. This condition is primarily monitored via a dedicated Cylinder Head Temperature (CHT) sensor, if equipped. In systems without a distinct […]

What Does Code P1286 Mean? The diagnostic trouble code P1286 signifies that the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), has detected an inconsistency in the commanded fuel injector pulse width and the actual resulting engine operating condition, specifically identifying a persistent lean air-fuel mixture. The ECM continuously calculates the […]

What Does Code P1287 Mean? The diagnostic trouble code P1287 signifies “Fuel Pulse In Range But Higher Than Expected.” This code is set by the Engine Control Module (ECM) or Powertrain Control Module (PCM) when it detects that the commanded fuel injector pulse width is consistently and significantly greater than the ECM’s internally calibrated and […]

What Does Code P1288 Mean? DTC P1288 signifies that the Engine Control Module (ECM), often referred to as the Powertrain Control Module (PCM), has detected an anomaly in the signal from the Cylinder Head Temperature (CHT) sensor that falls outside its programmed self-test range. The CHT sensor is a crucial thermistor-type sensor that measures the […]

What Does Code P1289 Mean? DTC P1289 signifies a condition where the Engine Control Module (ECM), also commonly referred to as the Powertrain Control Module (PCM), detects an abnormally high voltage input from the Cylinder Head Temperature (CHT) sensor circuit. The CHT sensor is a crucial thermistor-type sensor typically threaded directly into the cylinder head, […]

What Does Code P1290 Mean? DTC P1290 signifies that the Engine Control Module (ECM), also commonly referred to as the Powertrain Control Module (PCM), has detected an input signal from the Cylinder Head Temperature (CHT) sensor that is below its calibrated operational range or a predetermined low voltage threshold. The CHT sensor is typically a […]

What Does Code P1291 Mean? DTC P1291 indicates a detected electrical fault within the high-side circuit of one or more fuel injectors on Bank 1 of the engine. The Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), identifies this condition by continuously monitoring the current flow and voltage potential on the […]