OBD
P0881
TCM Power Input Signal Range/Performance
What it means
P0881 means TCM Power Input Signal Range/Performance.
Check these first
- A TCM power wire with high resistance
- A voltage drop during cranking
- A corroded TCM power connector
- A weak battery
What to do next
- Read TCM voltage on a scan tool
- Check the battery and charging system
- Perform a voltage drop test on the TCM power wire
- Inspect the TCM power connector
- Repair the power wire if the drop is high
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.