Powertrain
generic / SAE
P2509
ECM/PCM Power Input Signal Intermittent
The ECU detects sporadic interruptions of its supply voltage. The fault is set when supply drops below a threshold for short periods, often during cranking or due to a poor connection.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 09
Possible causes
- Poor battery cable connection high
- Intermittent main relay medium
- Connector with intermittent contact under vibration low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 50–400 €
- Estimated time: 0.3–2 h
- Component: ecu power supply
- Component: main relay
- Component: battery terminals
- MIL / check engine light
Sources
References
sae:J2012