P0891

Symptoms:
P0891-TRANSMISSION RELAY ALWAYS ON

When Monitored and Set Condition: P0891-TRANSMISSION RELAY ALWAYS ON
When monitored: When ignition key is turned from the OFF position to the RUN position and/or ignition is turned from the CRANK position to RUN position.
Set condition: This DTC is set if the Transmission Control Module senses greater than 3 volts at the Transmission Control Relay Output terminal of the TCM prior to the TCM energizing the relay.

POSSIBLE CAUSES:
INTERMITTENT WIRING AND CONNECTORS
TRANSMISSION CONTROL RELAY STUCK CLOSED
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT SHORT TO VOLTAGE
TRANSMISSION RELAY CONTROL CIRCUIT SHORT TO VOLTAGE
TCM - TRANSMISSION RELAY ALWAYS ON