Archives: DTC Codes

What Does Code P1106 Mean? The diagnostic trouble code (DTC) P1106 is a manufacturer-specific code, meaning its precise definition can vary significantly depending on the vehicle’s make and model. Historically, and most commonly, P1106 refers to a Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage condition. In this context, the Powertrain Control Module (PCM), […]

What Does Code P1107 Mean? DTC P1107 is a manufacturer-specific diagnostic trouble code that typically indicates an electrical malfunction within one of two distinct automotive subsystems, depending on the vehicle manufacturer and model. It most commonly refers to either a Dual Alternator Lower Circuit Malfunction or a Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low […]

What Does Code P1108 Mean? The OBD-II diagnostic trouble code P1108 signifies a “Dual Alternator Battery Lamp Circuit Malfunction.” This code is specific to vehicles equipped with two alternators, often found in heavy-duty trucks, commercial vehicles, or vehicles with high auxiliary electrical demands. The Engine Control Module (ECM), also known as the Powertrain Control Module […]

What Does Code P1109 Mean? DTC P1109 signifies an “IAT – B Sensor Intermittent” fault. This code indicates that the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), has detected an erratic, inconsistent, or out-of-range electrical signal from the Intake Air Temperature (IAT) Sensor “B” circuit. The IAT sensor is a […]

What Does Code P1110 Mean? DTC P1110 indicates a malfunction within the Intake Air Temperature (IAT) sensor circuit, specifically identifying an “Open” or “Short” condition. The IAT sensor is a thermistor that measures the temperature of the air entering the engine’s intake manifold. This data is critical for the Engine Control Module (ECM) or Powertrain […]

What Does Code P1111 Mean? DTC P1111 signifies an “Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage” condition. The Engine Control Module (ECM) or Powertrain Control Module (PCM) monitors the voltage signal from the IAT sensor, which is a thermistor designed to measure the temperature of the air entering the engine’s intake manifold. This […]

What Does Code P1112 Mean? The diagnostic trouble code P1112 signifies an Intake Air Temperature (IAT) Sensor Circuit Intermittent Low Voltage condition. This indicates that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected a sporadic drop in voltage from the IAT sensor circuit, falling below a calibrated threshold that typically corresponds […]

What Does Code P1113 Mean? DTC P1113 signifies an electrical anomaly within the Intake Air Temperature (IAT) sensor circuit, specifically indicating an “Open” or “Short” condition. The Engine Control Module (ECM) or Powertrain Control Module (PCM) continuously monitors the IAT sensor’s resistance, which inversely correlates with air temperature. The ECM supplies a precise 5-volt reference […]

What Does Code P1114 Mean? DTC P1114 indicates an intermittent low voltage condition detected by the Engine Control Module (ECM), also commonly known as the Powertrain Control Module (PCM), within the Engine Coolant Temperature (ECT) sensor circuit, or in some applications, the Intake Air Temperature (IAT) sensor “B” circuit. This code signifies that the ECM […]

What Does Code P1115 Mean? DTC P1115 is a manufacturer-specific diagnostic trouble code typically indicating an intermittent or persistent high voltage condition within either the Engine Coolant Temperature (ECT) sensor circuit or the Intake Air Temperature (IAT) sensor “B” circuit. The Powertrain Control Module (PCM), also known as the Engine Control Module (ECM), relies on […]