P1381 Cylinder position sensor: signal drops out at times

By: Diagno editorial team · Updated: 2026-10-15

P1381 means: Cylinder position sensor: signal drops out at times. The crankshaft or camshaft sensor tells the computer engine speed and piston position. Don't drive until the car has been checked. The engine could be damaged. The most common repair costs about €80–160 in Estonia, depending on make and model.

What it means

The crankshaft or camshaft sensor tells the computer engine speed and piston position. Without this signal it doesn't know when to fire the spark and fuel.

This is a make-specific code (Honda). The exact meaning can vary by model and year.

What you may notice

• No start or hard starting
• The engine cuts out while driving
• Rev counter jumps
• Engine light on

What could be wrong

1. 1Faulty sensor · Sensor replacement €80–160
2. 2Sensor connector or wire (oil or heat damage) · Sensor replacement €80–160
3. 3Damaged reluctor wheel · Sensor replacement €80–160
4. 4Chain or belt jumped · Timing belt or chain replacement €400–800

Repair difficulty: Moderate

What you can check yourself

Check whether the sensor connector is oily or loose. If the engine cuts out while driving, don't drive until it's checked. You can check the simple things yourself, but the repair is best done in a workshop.

How we fix it

1. We read the sensor on the diagnostic tool and compare it with other sensors
2. We check the connector, supply and ground
3. We repair the wiring or replace the sensor

Standard SAE description: Cylinder Position Sensor Intermittent Interruption