P0727

The ECM sends engine RPM information to the TCM via the CAN bus. The ECM also determines if the engine RPM information is reliable or not and sends that information to the TCM. DTC P0727 sets when the TCM receives an invalid engine RPM signal from ECM.

DTC PARAMETERS
DTC P0727 will set if the TCM receives an invalid engine RPM signal from the ECM when:
^ The ignition has been on for at least 3 seconds
^ The TCM has not lost communication with ECM
^ Transaxle Protection Mode is OFF
^ Condition exists for 4 seconds

DTC P0727 diagnostic runs continuously when the above conditions have been met.

The TCM will command Transaxle Protection Mode ON if this DTC is active.

DTC P0727 is a type A DTC.

DIAGNOSTIC AIDS
^ This code does not indicate a problem with the TCM or the transmission. It does indicate the ECM is not sending the required information to the TCM.
^ Check for and diagnose any DTCs stored in the ECM related to the crankshaft position (CKP) sensor circuit. Clear DTCs in the TCM after repairs are made.