Camshaft Position Sensor Circuit
What it means
The camshaft position sensor signal is missing or erratic; the ECU uses it for injector and ignition sequencing.
Symptoms
Hard starting, stalling, poor running, possible no-start.
Common causes
Faulty camshaft sensor, wiring/connector issue, or timing problem.
Recommended action
Inspect the sensor and wiring; replace the sensor if its signal is lost.
Related codes
FAQ — P0340
What does code P0340 mean?
Camshaft Position Sensor Circuit. The camshaft position sensor signal is missing or erratic; the ECU uses it for injector and ignition sequencing.
What are the symptoms of P0340?
Hard starting, stalling, poor running, possible no-start.
What causes P0340?
Faulty camshaft sensor, wiring/connector issue, or timing problem.
What should I do about P0340?
Inspect the sensor and wiring; replace the sensor if its signal is lost.
General reference based on the SAE J2012 standard. Exact causes for your vehicle may differ — when in doubt, consult a workshop.
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