Knowing the different codes on your car’s dashboard, especially Honda Code P1381 is essential. This code indicates a malfunction in the camshaft position sensor 1 circuit, which can cause severe damage to the engine. The cause of this code can range from a signal circuit is open or shorted to ground to the camshaft pickup assembly or camshaft position sensor being damaged or having failed, or even the PCM has failed. To ensure the safety of your vehicle, it is essential to understand the causes and solutions of P1381 and other codes that may appear on your car’s dashboard.
💥See also: Honda Code P3497
Causes & Solutions of Honda Code P1381
| Cause | Solution |
|---|---|
| CMP signal circuit is open or shorted to ground | Check the CMP signal circuit for any loose connections or corrosion |
| The CMP signal circuit is shorted to VREF or system power | Fix the wiring and connections of the CMP circuit to VREF or system power |
| The CMP pickup assembly or CMP sensor is damaged or has failed | Replace the CMP pickup assembly or CMP sensor |
| PCM has failed | Replace the PCM |
Open and Short Circuits
One of the leading causes of Honda Code P1381 is an open or shorted circuit in the camshaft position sensor (CMP) signal circuit. A loose connection or corrosion in the wiring or connectors can cause an available course. To fix this problem, inspecting the CMP signal circuit for any loose connections or corrosion is essential.
Short to VREF or System Power
Another possible cause of P1381 is a short circuit in the CMP signal circuit to VREF or system power. This can cause the CMP signal to become stuck in one of its two states, either high or low, and trigger the P1381 code. To fix this problem, inspecting the wiring and connections of the CMP circuit to VREF or system power is essential.
CMP Pickup Assembly or CMP Sensor
The CMP pickup assembly or CMP sensor can also be damaged or have failed, which can cause the P1381 code. In this case, the CMP pickup assembly or CMP sensor needs to be replaced.
PCM Failure
In some cases, the PCM can fail, which can cause the P1381 code. In this case, the PCM needs to be replaced.
Conclusion
The Honda Code P1381 is a critical code to be aware of, as it can cause severe damage to the engine. The causes of this code can range from an open or shorted circuit in the camshaft position sensor (CMP) signal circuit to a short course to VREF or system power, to a damaged or failed CMP pickup assembly or CMP sensor, and even the PCM has fallen. To ensure the safety of your vehicle, it is essential to understand the causes and solutions of P1381 and other codes that may appear on your car’s dashboard. If you experience Honda Code P1381, it is essential to take the necessary steps to fix it as soon as possible to avoid any further damage to your engine.
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