TCM Power Relay Sense Circuit High

Where it lives

For P0891, the circuit described runs through the relay. The description of P0891 reports a fault at the relay.

Check these first

• An open in the relay sense wire
• A failed TCM power relay
• A backed out relay sense connector pin
• A TCM that misreads the sense circuit

What to do next

1. Read the relay sense state on a scan tool
2. Test the relay sense wire for an open
3. Check the relay and its connector
4. Replace the relay if the sense stays high
5. Reprogram the TCM if the relay tests good
6. Clear the code and retest

Look up another code