DTC P0343: Camshaft Position (CMP) Sensor Too High Frequency Check the ''On Board Diagnostic (OBD) System Check''. Was the ''OBD System Check'' performed? YES – Go to step 2. NO – Go to OBD System Check. Attempt to start the engine. Did the engine start and continue to run? YES – Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the CMP sensor and at the ECM. NO – Go to step 3. Turn the ignition switch OFF. Disconnect the CMP sensor 3P connector. Turn the ignition switch ON (II). Measure voltage between the CMP sensor 3P connector terminals No. 3 and body ground. Wire side of female terminals CMP sensor 3P connector Is there battery voltage? YES – Go to step 7. NO – Repair open in the wire between the main relay and the CMP sensor.

Check the CMP sensor signal and ground circuit for short. Is a problem found? YES – Repair open in the signal or ground wire between the ECM and the CMP sensor. NO – Go to step 8. Check the CMP sensor signal and ground circuit for open. Wire side of female terminals CMP sensor 3P connector JUMPER WIRE Is a problem found? YES – Repair open in the signal or ground wire between the ECM and the CMP sensor. NO – Go to step 9. aaa