P0340: Camshaft Position Sensor A Circuit Malfunction (Bank 1 or Single Sensor)
System: Engine position · Priority: high
What P0340 means
The control module detected a condition matching the generic definition Camshaft Position Sensor A Circuit Malfunction (Bank 1 or Single Sensor). A trouble code identifies what the module detected; it does not automatically identify the failed part.
Useful next checks
- Inspect cam-sensor wiring and connector.
- Check synchronization data if your scan tool supports it.
- Do not overlook timing-chain/belt or reluctor issues.
Why vehicle context matters
The same generic code can have different diagnostic paths depending on engine, calibration, wiring layout, service bulletins and related codes. Freeze-frame and live data can help establish when the fault occurred.
Need a scanner for P0340?
Build a direct VeroRoad page for your year, make and model. It will open the vehicle-specific read-codes / diagnostic context instead of a generic product list.