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The P1133 code is a manufacturer-specific diagnostic trouble code (DTC) that primarily affects General Motors vehicles, including Chevrolet, Buick, GMC, and Cadillac models. This code indicates an issue with the Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1, specifically related to insufficient switching between rich and lean conditions. P1133 Code Meaning P1133 Code Common Causes HO2S Insufficient Switching Sensor 1 Faulty oxygen sensor Slow response

The P0100 code is a diagnostic trouble code (DTC) that indicates a Mass Air Flow (MAF) Circuit Malfunction. This code is crucial for engine performance and emissions control, as it directly affects the air-fuel mixture in your vehicle’s engine. When your car’s onboard computer detects an issue with the MAF sensor or its circuit, it triggers this code and usually illuminates the check engine light.

The P0154 code is a diagnostic trouble code (DTC) that indicates an issue with the oxygen (O2) sensor circuit on bank 2, sensor 1 of the vehicle’s engine. This code is triggered when the powertrain control module (PCM) detects no activity or response from the O2 sensor, which is crucial for maintaining the proper air-fuel mixture in the engine. P0154 Code Meaning P0154 Code Common

The P0523 code is a diagnostic trouble code (DTC) that indicates an issue with the engine oil pressure sensor or switch circuit. When the powertrain control module (PCM) detects an unusually high voltage reading from the oil pressure sensor, it triggers this code. Understanding and addressing this code promptly is crucial for maintaining your vehicle’s engine health and performance. P0523 Code Meaning P0523 Code Common

The P0139 diagnostic trouble code (DTC) is a common issue that vehicle owners and DIY mechanics may encounter. This code indicates a problem with the oxygen sensor circuit, specifically a slow response from Bank 1, Sensor 2. Understanding this code and its implications is crucial for maintaining your vehicle’s performance and passing emissions tests. P0139 Code Meaning P0139 Code Common Causes Oxygen Sensor Circuit Slow

The P305F code is a diagnostic trouble code (DTC) related to the dual battery control module performance in vehicles equipped with start-stop technology. This code indicates that the engine control module (ECM) has detected an issue with the voltage supplied by the auxiliary battery during engine cranking events. Understanding and resolving this code is crucial for maintaining proper vehicle operation and passing emissions tests. P305F

The P0307 diagnostic trouble code (DTC) indicates a misfire detected in cylinder 7 of the engine. This code is part of the OBD-II system and is considered a powertrain code. When the engine control module (ECM) detects an irregularity in the combustion process of cylinder 7, it triggers this code and usually illuminates the check engine light. P0307 Code Meaning P0307 Code Common Causes Cylinder

The P0140 trouble code, officially defined as “Oxygen Sensor Circuit No Activity Detected (Bank 1, Sensor 2),” is a diagnostic trouble code (DTC) that indicates an issue with the post-catalytic oxygen sensor circuit. This sensor plays a vital role in monitoring the efficiency of the catalytic converter and ensuring proper vehicle emissions. When this code is triggered, it means the Engine Control Module (ECM) is

The P0320 trouble code signifies a malfunction in the ignition/distributor engine speed input circuit. This code is triggered when the Powertrain Control Module (PCM) detects an issue with the signals from either the crankshaft position sensor (CKP) or the camshaft position sensor (CMP). These sensors are crucial for monitoring engine timing, and any disruption in their signals can lead to performance issues or even prevent

The P0402 diagnostic trouble code (DTC) is a generic powertrain code related to the vehicle’s exhaust gas recirculation (EGR) system. When this code is triggered, it indicates that the powertrain control module (PCM) has detected excessive EGR flow. This issue can lead to various drivability problems and increased emissions, making it crucial to address promptly. P0402 Code Meaning P0402 Code Common Causes Excessive EGR flow