P0340
Camshaft Position Sensor Circuit Malfunction
Description
Camshaft Position Sensor Circuit Malfunction (Bank 1) This body system diagnostic trouble code indicates an issue with the vehicle's comfort, safety, or convenience systems.
OBD Codes Details
Possible Causes
Blown fuse, faulty switch, damaged wiring harness, poor electrical connection
Solution
Check fuses and relays, inspect wiring harness, test switches and sensors, repair damaged circuits
Symptoms
- Engine cranks but is hard to start or fails to start
- Check engine light illuminated
- Rough idle or engine misfiring
- Reduced power and poor acceleration
- Engine stalling
Diagnostic Recommendations
- Inspect camshaft position sensor wiring and connector
- Test sensor output signal with a scan tool or oscilloscope
- Check timing chain/belt and camshaft phasing for correct alignment
- Inspect sensor mounting and air gap
- Replace camshaft position sensor if signal is absent or erratic
Repair Cost Estimate
- Camshaft position sensor replacement: $100-300
- Wiring repair: $80-200
- Timing chain/belt inspection and repair: $300-1200
- Diagnostic scan: $80-150
- Total diagnostic and repair: $150-1500
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Fact-checking completed
Verified by:
Pavel Volkov
Created:
Last updated:
Information verified against official sources
Official Sources
Society of Automotive Engineers
Official OBD-II diagnostic trouble codes standard (SAE J2012)
Automotive engineering standards organization
International Organization for Standardization
International standard for vehicle diagnostic systems
International standards for automotive diagnostics
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