P0882
TCM Power Input Signal Low
TCM main supply voltage falls below the operating threshold for an extended period, causing reset risk and unreliable shift control.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
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
Common causes
Ordered by how often each turns out to be the cause.
- Discharged or weak batteryCommon
- Voltage drop in supply wiringPossible
Parts involved
- TCM
- Battery
- Wiring Harness
P0882 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.