TCM Power Relay Sense Circuit Intermittent
What it means
P0892 means the transmission control module has detected intermittent voltage on the circuit that senses its power relay — the feedback line confirming the relay is supplying the module. The engine still starts, but when that signal drops out the transmission may briefly shift harshly, slip, or fall into limp mode, then recover. Because the fault comes and goes, a loose connector or a failing relay is the usual culprit, and a wiggle test while monitoring often finds it.
Can I keep driving? The engine starts, but an intermittent power feed to the transmission control module can cause occasional harsh shifts, slipping, or a temporary limp mode; get it diagnosed soon.
Common symptoms
What you'll notice
- Check-engine light on (may come and go)
- Intermittent harsh or delayed shifting
- Occasional slipping or fail-safe (limp) mode
- Transmission behaves normally at times, then acts up
Common causes
Most likely first
- Failed or intermittent TCM power relayLikely
- Loose or corroded connectors in the relay sense circuitCommon
- Intermittent open or short in the relay sense wiringCommon
- Failed transmission control module (TCM)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and wiggle-test the relay and connectors while watching for the fault to appear.
- Inspect the relay sense circuit wiring and connectors for corrosion, chafing, or loose pins.
- Test or substitute the TCM power relay to rule it out.
- If the relay and wiring are good, suspect the TCM. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0892?+
Can I just clear P0892?+
Related codes
Often seen with P0892
Read & clear P0892 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.