P1381 ACURA, HONDA, ISUZU: CYLINDER POSITION SENSOR INTERMITTENT INTERRUPTION
POST UPDATED IN June, 2023
P1381 ACURA, HONDA, ISUZU: CYLINDER POSITION SENSOR INTERMITTENT INTERRUPTION
The CKP sensor (Crankshaft Position Sensor) determines the fuel injection timing, cylinder firing, and engine speed. In this system, you can also find the TDC sensor (Top Dead Center Sensor), which determines whether the crankshaft angle is within the corresponding parameter. Besides that, it determines the ignition timing at start-up. On the other hand, the CYP sensor (Cylinder Position Sensor) detects in which position cylinder 1 is located to start the sequential fuel injection for the rest of the cylinders. All these sensors are integrated with the distributor.
The OBDII fault code P1381 is set on Acura, Honda, and Isuzu brand vehicles when a malfunction is detected by the Cylinder Position Sensor.
The reasons why the DTC P1381 OBD2 code is set are:
Steps to troubleshoot the P1381 OBDII diagnostic code: