OBD-II code · Powertrain (generic)
P0880 TCM Power Input Signal
The TCM detects an out-of-range supply voltage at its main power input. Battery voltage is too low or too high during operation.
Is it safe to drive with P0880?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyLow battery or alternator fault
- PossiblePoor TCM ground
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
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Tcm, Battery, Alternator, Wiring Harness
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.