OBD · Engine sensors
P0340 Camshaft position sensor A circuit
What this code means
P0340 is a generic OBD code shared by all manufacturers since 2001 for petrol and 2004 for diesel. It relates to: engine sensors. The code tells you what the ECU measured as abnormal, not necessarily which part to replace.
Most common causes
- Crankshaft sensor#1
The engine cuts out when hot and restarts once cooled down: the classic signature.
- Timing belt due#2
Cost of related repairs
| Independent garage | Main dealer | |
|---|---|---|
| Crankshaft position sensor | £60 – £210 | £80 – £335 |
| Timing belt kit with water pump | £315 – £780 | £440 – £1,280 |
| Wet timing belt (PureTech) | £575 – £1,315 | £815 – £2,190 |
How to read this code
An OBD scanner plugged into the 16-pin socket under the steering wheel reads and clears codes. Bluetooth models cost £20 to £40. Clearing a code without fixing the fault is pointless: it comes back.
Related problems
Frequently asked questions
What does code P0340 mean?
P0340: Camshaft position sensor A circuit. P0340 is a generic OBD code shared by all manufacturers since 2001 for petrol and 2004 for diesel. It relates to: engine sensors. The code tells you what the ECU measured as abnormal, not necessarily which part to replace.
Can I drive with code P0340?
Fix soon. Drive gently and as little as possible. The fault can get worse and damage other parts.
How much does it cost to fix P0340?
Crankshaft position sensor: £60 – £210, Timing belt kit with water pump: £315 – £780, Wet timing belt (PureTech): £575 – £1,315.
How to read this code
An OBD scanner plugged into the 16-pin socket under the steering wheel reads and clears codes. Bluetooth models cost £20 to £40. Clearing a code without fixing the fault is pointless: it comes back.