P258DVacuum Pump Control Circuit A High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P258D marks a control circuit A of the vacuum pump whose signal sits above the expected range, most often a short to battery positive on the relay or pump control line, so the control unit can no longer switch the pump as it wants. If the pump keeps running, it wears out early; FCA case S1805000006 notes that pumps forced into excessive run time tend to fail. No manufacturer documents P258D publicly, so CARB 13 CCR 1968.2 comprehensive component rules apply. Ford's hybrid OBD summary shows the reference for the same circuit, a monitoring voltage between 1.3 and 5.0 V while the relay is off. Stellantis case S2209000006 adds that pump codes logged during long cranking can be harmless. P258C is the low-side partner, P258B the plausibility code. The driver may hear the pump run constantly.
- What you may notice
- Engine or brake warning lamp on
- Vacuum pump runs continuously, even with the engine off in some cases
- Likely causes
- LikelyControl wire shorted to a battery-voltage line
- PossiblePump relay contacts stuck closed
- RareFaulty output stage in the controlling module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.