P0343

DESCRIPTION
The Camshaft Position (CMP) sensor senses the Top Dead Center (TDC) point of the #1 cylinder in the compression stroke. The CMP sensor signal allows the Engine Control Module (ECM) to determine the fuel injector sequence starting point.





FAILURE CONDITIONS
The ECM will set P0343 and the Malfunction Indicator Lamp (MIL) will turn on if during two driving cycles there is no CMP sensor signal within 200 engine revolutions when the engine speed is above 760 rpm. This code indicates unexpected camshaft position readings by the CMP sensor or ECM when the engine is rotating.

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TEST PROCEDURE






TROUBLESHOOTING PROCEDURES

TROUBLESHOOTING HINTS
If the camshaft position sensor does not operate correctly, correct sequential injection does not occur so the engine may stall or run irregularly at idle or fail to accelerate normally.