Archives: DTC Codes

What Does Code P0308 Mean? The diagnostic trouble code P0308 signifies that the Engine Control Module (ECM), also commonly referred to as the Powertrain Control Module (PCM), has detected a misfire condition specifically within Cylinder 8 of the engine. A misfire occurs when an insufficient amount of fuel is combusted in a cylinder, leading to […]

What Does Code P0309 Mean? DTC P0309 signifies that the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), has detected a misfire condition specifically on Cylinder 9. The ECM monitors crankshaft rotational speed and acceleration through the Crankshaft Position (CKP) sensor. During normal engine operation, each cylinder’s power stroke contributes to […]

What Does Code P0310 Mean? DTC P0310 signifies that the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), has detected a misfire condition specifically within cylinder number 10. The ECM utilizes input from the crankshaft position (CKP) sensor to monitor the rotational speed and acceleration of the crankshaft. During normal combustion, […]

What Does Code P0311 Mean? The OBD-II diagnostic trouble code P0311 signifies that the Powertrain Control Module (PCM), often referred to as the Engine Control Module (ECM), has detected a misfire condition specifically in Cylinder 11. The PCM continuously monitors the rotational speed of the crankshaft via the Crankshaft Position (CKP) sensor. During the normal […]

What Does Code P0312 Mean? The OBD-II diagnostic trouble code P0312 indicates that the Engine Control Module (ECM), also commonly referred to as the Powertrain Control Module (PCM), has detected a misfire condition specifically in cylinder #12 of the engine. A misfire occurs when a cylinder fails to contribute its expected power output to the […]

What Does Code P0320 Mean? The diagnostic trouble code P0320, signifying “Ignition/Distributor Engine Speed Input Circuit Malfunction,” indicates that the Powertrain Control Module (PCM) or Engine Control Module (ECM) has detected an irregular, inconsistent, or absent signal from the engine speed input circuit. This crucial input typically originates from the Crankshaft Position (CKP) sensor in […]

What Does Code P0321 Mean? The Engine Control Module (ECM), also commonly referred to as the Powertrain Control Module (PCM), sets diagnostic trouble code P0321 when it detects an irregular, intermittent, or out-of-range signal from the crankshaft position (CKP) sensor or, in some applications, the camshaft position (CMP) sensor. In certain older, distributor-equipped vehicles, this […]

What Does Code P0322 Mean? DTC P0322, “Ignition/Distributor Engine Speed Input Circuit No Signal,” indicates that the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), has not detected an expected engine speed signal from its primary input source. This primary source is typically the Crankshaft Position (CKP) sensor in most modern […]

What Does Code P0323 Mean? The OBD-II diagnostic trouble code P0323 indicates an intermittent malfunction in the Ignition/Distributor Engine Speed Input Circuit. This circuit is crucial for the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), to accurately determine engine RPM and crankshaft position. The ECM relies on this precise signal, […]

What Does Code P0325 Mean? DTC P0325 signifies a detected electrical malfunction within the circuit of Knock Sensor 1 (Bank 1 or Single Sensor). The Engine Control Module (ECM) or Powertrain Control Module (PCM) continuously monitors the voltage signal generated by the knock sensor(s) to detect engine pre-ignition or detonation (often referred to as “pinging” […]