Just changed timing belt and CAM sensor cleared.

DTC� P0340:� CAMSHAFT� POSITION� (CMP)� SENSOR� CIRCUIT

CAUTION: If� ECM� replacement� is� instructed� in� following� testing, � always� ensure� ECM� connectors� and� ground� circuit� are� okay.� If� either� are� suspect, � repair� and� repeat
testing� to� confirm� ECM� malfunction.

Circuit� Description

The� CMP� sensor� is� a� pick up� coil� mounted� on� left� side� of� cylinder� head.� A� 1 tooth� signal� plate� is� mounted� on� intake� camshaft.� DTC� is� set� when� either� no� cranking� or� engine� running� signal� is� received� by� ECM� from
sensor.� Possible� causes� are:

? Open� or� short� in� CMP� sensor� circuit.
? CMP� sensor.
? Starter.
? ECM.

Diagnosis� &� Repair

1. Disconnect� CMP� sensor� connector.� Using� ohmmeter, � measure� resistance� between� CMP� sensor� connector� terminals.� Resistance� should� be� 835 1400� ohms� (cold� sensor)� or� 1060 1645� ohms� (hot� sensor).
2. Replace� CMP� sensor� as� necessary.� If� CMP� sensor� is� okay, � check� for� open� or� short� circuit� in� wiring� harness� between� ECM� and� CMP� sensor.� See� appropriate� wiring� diagram� in� WIRING� DIAGRAMS� article.
Repair� wiring� as� necessary.
3. If� wiring� harness� is� okay, � remove� and� inspect� CMP� sensor.� Also� inspect� signal� plate.� Replace� CMP� sensor� and/or� signal� plate� as� necessary.� If� both� components� are� okay, � replace� ECM.

First verify the timing belt is on correctly, then you need to have a proper diagnosis done for the 340 code.

A code never identifies bad parts, just failed systems