P0344 Camshaft position sensor: signal drops out at times ("A", bank 1)

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

P0344 means: Camshaft position sensor: signal drops out at times ("A", bank 1). 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 repair usually costs about €60–350 in Estonia.

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. The signal drops out now and then. The most common cause is a loose connector or a chafed wire.

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. 1Connector loose, damp or corroded
2. 2Wire broken or chafed
3. 3Faulty sensor
4. 4Engine computer fault (rare)

Repair difficulty: Moderate

What you can check yourself

First look at the connector and wiring: anything loose, melted or green with corrosion? 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 fault data on the diagnostic tool and check whether the fault is constant
2. We measure the circuit's supply, ground and signal
3. We repair the wire or replace the connector
4. If the wiring is fine, we replace the sensor

Standard SAE description: Camshaft Position Sensor A Circuit Intermittent (Bank 1)