Powertrain
generic / SAE
P2508
ECM/PCM Power Input Signal High
The ECM/PCM switched-battery input reads above the upper threshold. Most often caused by a charging system overvoltage (failed alternator regulator) or wrong jump-start procedure. Sustained high voltage risks damaging ECU electronics.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 08
Possible causes
- Alternator regulator overvoltage high
- Improper external power source or jump-start medium
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 120–700 €
- Estimated time: 0.5–2.5 h
- Component: alternator regulator
- Component: power distribution
- MIL / check engine light
Sources
References
sae:J2012