Code
P0340
Ignition / Camshaft
Camshaft position sensor circuit malfunction
The camshaft position signal is missing, from a sensor fault or skipped timing.
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Most likely causes
- Faulty cam sensor
- Wiring fault
- Timing belt or chain skipped
Symptoms you may notice
- Check engine light
- Poor idle or no start
- Reduced power
Checks to run
- Test sensor signal
- Check wiring
- Verify cam timing
Tools you may need
Multimeter
OBD-II scanner
Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.