DTC U0401: Invalid Data Received from ECM/PCM A: Description

The PSCM will monitor the HS-CAN bus when the ignition has been on for more than 5 seconds, when the voltage to the PSCM is greater than 9 volts and when there are no DTCs present that are inhibiting PSCM operation.

• DTC U0401:00 (Invalid Data Received from ECM/PCM A) - This DTC will set if the PSCM receives invalid or unknown messages from the PCM instead of the actual engine speed (non-hybrid), ready light (hybrid) and vehicle speed (all) data messages, in addition to DTC U0001:00 is not present in the PSCM.