What P0340 means
The ECU has lost or cannot trust the camshaft position signal. Symptoms range from a long crank to a no-start or stall.
Common causes
- Failed camshaft position sensor
- Damaged wiring or connector
- Reluctor wheel damage
- Timing chain jumped
How it is usually fixed
- 1Inspect wiring and connector
- 2Compare cam and crank signals with a scope if available
- 3Replace the sensor
Other common codes
- P0011 — Camshaft Position A – Timing Over-Advanced (Bank 1)
- P0030 — HO2S Heater Control Circuit (Bank 1, Sensor 1)
- P0101 — Mass Air Flow Circuit Range/Performance
- P0113 — Intake Air Temperature Sensor Circuit High
- P0118 — Engine Coolant Temperature Sensor Circuit High
- P0131 — O2 Sensor Circuit Low Voltage (Bank 1, Sensor 1)
Code information is general guidance, not a diagnosis for a specific vehicle. Confirm with live data and manufacturer test procedures before replacing parts.