Powertrain
generic / SAE
P0883
TCM Power Input Signal High
TCM main supply voltage exceeds the operating threshold, typically caused by a faulty voltage regulator on the alternator.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number8 / 83
Possible causes
- Alternator overcharging high
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: 200–800 €
- Estimated time: 1–3 h
- Component: tcm
- Component: alternator
- Component: voltage regulator
- MIL / check engine light
Sources
References
sae:J2012