P2506ECM/PCM Power Input Signal Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2506 is the plausibility variant: the supply reaching the engine module is electrically present but its value or behaviour does not fit the operating state. No passenger-car maker publishes how it detects this. The closest coded use is Deutz, whose EMR engine controller assigns P2506 with failure type 18 to a critical overcurrent in the ECU power supply, a reading that only makes sense as a performance check, not as a plain open or short. Ford lists P2506 with an M in the indicator column of its 2014 BOSS 302S code table. CARB requires makers to check input signals for rationality as comprehensive components. Clear low or high values belong to P2507 and P2508, dropouts to P2509. In practice the code points to supply wiring, relay or module.
- What you may notice
- Check engine lamp (Ford lists it as MIL code)
- Sporadic stalling or restarts of the module possible
- Likely causes
- LikelyResistance in supply fuse, relay contact or connector
- PossibleExcessive current drawn through the module supply (Deutz)
- RareInternal supply monitoring of the module faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €30 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.