P0336
CIRCUIT DESCRIPTIONThe hall effect Crankshaft Position (CKP) sensor signal indicates the crankshaft speed and position. There are 57 teeth on the front of the crankshaft sprocket, plus a sync gap. The CKP sensor will output an ON-OFF pulse as each window passes the sensing element. The CKP sensor is connected directly to the Electronic Control (ECM) Module by the following circuits:
^ The 12-volt reference circuit.
^ The low reference circuit.
^ The CKP sensor signal circuit.
CONDITIONS FOR RUNNING THE DTC
The engine is cranking or running.
CONDITIONS FOR SETTING THE DTC
The Engine Control Module (ECM) determines that the CKP sensor signal is out of range for less than 2 seconds.
ACTION TAKEN WHEN THE DTC SETS
^ The control module illuminates the Malfunction Indicator Lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
^ The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.
CONDITIONS FOR CLEARING THE MIL/DTC
^ The control module turns OFF the Malfunction Indicator Lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
^ A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
^ A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
^ Use a scan tool in order to clear the MIL and the DTC.
DIAGNOSTIC AIDS
^ An intermittent CKP sensor signal may cause DTC P0336 to set. Wiggle the wiring harness with the engine running and observe the Cam Signal Missed parameter of the scan tool. If the parameter indicates anything other than 0, there is an intermittent condition. Refer to Testing for Intermittent and Poor Connections and Inducing Intermittent Fault Conditions in Diagrams.
^ A short from the 12 volt reference circuit to the Low reference circuit internally in the Camshaft Position (CMP) or Crankshaft Position (CKP) sensor can cause all three DTCs P0336, P0340, and P1345 to set.
TEST
