Powertrain
generic / SAE
P0890
TCM Power Relay Sense Circuit Low
The TCM monitors the output side of its power relay; when the sense voltage is below threshold while relay is commanded closed, this code sets.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number8 / 90
Possible causes
- Relay failed open high
- Open wiring at sense input medium
- Connector pins corroded - high contact resistance low
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–400 €
- Estimated time: 0.5–2.5 h
- Component: tcm relay
- Component: wiring harness
- Component: tcm
- MIL / check engine light
Sources
References
sae:J2012