Archives: DTC Codes

What Does Code P1116 Mean? DTC P1116 signifies that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected an implausible or erratic signal from the Engine Coolant Temperature (ECT) sensor, specifically identifying it as “out of self-test range” or simply “out of range.” This code does not necessarily indicate a direct electrical […]

What Does Code P1117 Mean? Diagnostic Trouble Code (DTC) P1117 indicates an intermittent fault within the Engine Coolant Temperature (ECT) sensor circuit. The Engine Control Module (ECM) or Powertrain Control Module (PCM) monitors the ECT sensor’s signal, which is a thermistor-based variable resistor that changes its resistance inversely with temperature. As coolant temperature increases, the […]

What Does Code P1118 Mean? The OBD-II diagnostic trouble code P1118 indicates a condition where the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected an abnormally low voltage input from the Manifold Absolute Temperature (MAT) sensor circuit. This “low input” signal is outside the sensor’s expected operational range, and it typically translates […]

What Does Code P1119 Mean? DTC P1119, primarily recognized as a manufacturer-specific or enhanced code, signifies an issue within the Manifold Absolute Temperature (MAT) sensor circuit, specifically indicating a “High Input” condition. The Engine Control Module (ECM) or Powertrain Control Module (PCM) monitors the voltage signal from the MAT sensor to determine the temperature of […]

What Does Code P1120 Mean? DTC P1120 signifies a condition where the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected that the Throttle Position Sensor (TPS) signal voltage is outside its predefined operational range. This is often a manufacturer-specific code, predominantly found in Toyota/Lexus vehicles, indicating a fundamental fault in the TPS […]

What Does Code P1121 Mean? Diagnostic Trouble Code P1121 indicates an intermittent high voltage condition detected within the Throttle Position (TP) sensor circuit. The Engine Control Module (ECM), also commonly referred to as the Powertrain Control Module (PCM), monitors the voltage output from the TP sensor to determine the throttle plate’s angular position. This sensor […]

What Does Code P1122 Mean? Diagnostic Trouble Code (DTC) P1122 signifies an “Intermittent Low Voltage” condition detected within the Throttle Position (TP) Sensor circuit. The Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), relies on the TP sensor to accurately determine the throttle plate’s angular position. This data is critical for […]

What Does Code P1123 Mean? DTC P1123 indicates that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected an anomalous signal from the Throttle Position Sensor (TPS). Specifically, the sensor’s voltage output is within its normal operational range (e.g., typically 0.5V to 4.5V) but is consistently reporting a value that is higher […]

What Does Code P1124 Mean? DTC P1124, which translates to “Throttle Position Sensor Out Of Self Test Range,” indicates that the Powertrain Control Module (PCM), or Engine Control Module (ECM), has detected an abnormal voltage signal from the Throttle Position (TP) sensor during its continuous monitoring or a specific diagnostic self-test. The TP sensor is […]

What Does Code P1125 Mean? DTC P1125 signifies an intermittent fault detected within the Throttle Position Sensor (TPS) circuit. The Throttle Position Sensor is a critical input device for the Engine Control Module (ECM) or Powertrain Control Module (PCM), typically a potentiometer that provides a variable voltage signal directly proportional to the throttle plate’s angle. […]