P0340 — Camshaft Position Sensor Circuit Malfunctioning
| Meaning | The engine computer has lost the proper signal from the camshaft position sensor. This sensor tells the computer exactly where the valves are, which is necessary to inject fuel and spark at the right moment. |
| Family | Powertrain (P) |
Typical symptoms
The engine stalls unexpectedly while driving or idling
The vehicle lacks normal power or runs rough
The check engine light is turned on
Common causes
Damaged, corroded, or loose wiring and electrical connectors
Worn timing chain or belt affecting sensor alignment
Internal failure inside the engine computer
What to do
Frequently asked questions
What does code P0340 mean?
Camshaft Position Sensor Circuit Malfunctioning. The engine computer has lost the proper signal from the camshaft position sensor. This sensor tells the computer exactly where the valves are, which is necessary to inject fuel and spark at the right moment.
Can I keep driving with code P0340 active?
With caution: limp mode possible, have it checked soon
Common causes — P0340
Faulty camshaft position sensor Damaged, corroded, or loose wiring and electrical connectors Worn timing chain or belt affecting sensor alignment Internal failure inside the engine computer
How do you fix code P0340?
Have a mechanic check the wiring harness and the sensor connector first, as poor electrical contact is very common. You should address this soon because it can leave you stranded if the engine stops starting altogether.
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- P0300 — Random/multiple cylinder misfire
- P0301 — Cylinder 1 misfire
- P0302 — Cylinder 2 Misfire Detected
- P0303 — Cylinder 3 Misfire Detected
- P0304 — Cylinder 4 Misfire Detected
- P0305 — Cylinder 5 Misfire Detected
- P0306 — Cylinder 6 Misfire Detected
- P0307 — Cylinder 7 Misfire Detected
- P0308 — Cylinder 8 Misfire Detected
- P0309 — Cylinder 9 Misfire Detected
- P0310 — Cylinder 10 Misfire Detected
- P0311 — Cylinder 11 Misfire Detected