P258D code meaning
Vacuum Pump Control Circuit A High
Powertrain system Generic code P25xx codes Check engine light
What P258D means
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.
P258D at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P258D
- Engine or brake warning lamp on
- Vacuum pump runs continuously, even with the engine off in some cases
Common causes of P258D
- Most likelyControl wire shorted to a battery-voltage line
- PossiblePump relay contacts stuck closed
- Less likelyFaulty output stage in the controlling module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Vacuum pumpWiring harness
What each part of P258D means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 5 | Area: vehicle speed, idle control and auxiliary inputs. |
| 8D | The exact fault in that area. |
What to do next
- Note P258D and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P258D
What does P258D mean?
P258D means "Vacuum Pump Control Circuit A High". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P258D?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P258D fail an emissions test?
Yes, it can. P258D is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P258D to fix?
Difficulty: medium. A typical repair takes 0.3 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P258D clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.