P0882 TCM power input signal low
What P0882 means
The transmission control unit has measured a supply voltage below its normal range. Low voltage can make it shift erratically or enter limp mode.
P0882 is a generic SAE J2012 code: it means the same on every make. The exact cause still depends on the car, so read the freeze-frame data before replacing parts.
At a glance
- Severity
- Medium
- Typical repair cost
- 80–500 €
- Workshop time
- 0.5–2.5 h
- Repair difficulty
- Medium
- DIY possible
- Yes
- Check engine light
- Yes
- Affects emissions test
- No
Parts and labour at an independent workshop in Europe. Main dealers charge more; the cause decides the bill, not the code.
Symptoms
- Erratic shifting
- Limp mode
- Transmission warning on
- Often seen together with hard starting or a weak battery
Common causes
- Weak or failing battery
- Loose or corroded battery terminals
- Poor ground connection for the transmission control unit
- Blown fuse or faulty relay in the TCM supply
- Faulty alternator
Can I keep driving with P0882?
You can drive carefully, but have it checked within one to two weeks.
What to check first
- Test the battery and charging voltage
- Clean and tighten the battery terminals and grounds
- Check the TCM fuses and relay
- Check voltage at the TCM connector
Related codes
- P0894 Transmission component slipping
- P0868 Transmission fluid pressure low
- P0841 Transmission fluid pressure sensor/switch A range/performance
Data: TORKO fault-code catalogue, built on OBDex (CC0-1.0) and reviewed against workshop practice. Informational only — it does not replace a diagnosis by a mechanic.
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