P0340 — Camshaft position sensor circuit malfunction detected
The engine's computer isn't getting a proper signal from the camshaft position sensor, which helps control ignition timing and fuel injection. This can happen due to wiring problems, a faulty sensor, or issues with the sensor's circuit. Without accurate camshaft data, the engine may run poorly or have trouble starting.
Common causes
The cause is almost always one of a few things. Here they are — P0340 rarely comes from anything outside this list:
- Faulty camshaft position sensor
- Damaged or corroded wiring/connectors
- Timing chain or belt problems affecting sensor signal
- Faulty engine control module (rare)
Where to start
In the order a sensible mechanic would work — the cheap checks first, the expensive replacements only after:
- Inspect and clean sensor wiring and connectors
- Test sensor output with diagnostic tools
- Replace camshaft position sensor if faulty
- Check engine timing components if sensor replacement fails
That is what holds for P0340 in general. From here it depends on your engine — tell me which car it is and what it does, and I will give you the steps for it: real procedures, torque figures and diagrams instead of general advice.
Why TorqFix for your car?
Above is what the code means and why it appears. TorqFix goes further — it gives you specific procedures, torque values, wiring diagrams and pinouts for your exact engine, not generic steps for every car. Real workshop data (127,000+ diagrams, 10,000+ procedures), interpreted by AI in your language.
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Code breakdown
🔧 Related repair procedures
- AUDI: Removing and installing all timing chain covers
- AUDI: Removing camshaft timing chains from camshafts
- VW: Installing timing chains for intermediate shaft drive and camshaft drive
- AUDI: Removing timing chain from camshafts
- VW: Removing and installing timing chain and drive chain for oil pump
- AUDI: Removing camshaft timing chain from camshaft timing chain sprockets
- VW: Checking timing chain
- VW: Adjusting valve timing (installing timing chains)
- AUDI: Removing and installing camshaft timing chain - engine codes CAMA, CAMB, CCLA, CCWA, CCWB, CGKA, CGKB
- VW: Removing and installing camshaft timing chain and intermediate shaft drive chain
Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
The same code can mean different things on different makes. Match the meaning to your make before acting on it.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
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