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.
Medium severity. Can I keep driving?If the car is running normally, drive in moderation to a repair shop. If it loses power or another warning appears, do not continue.
Symptoms
- Engine or brake warning lamp on
- Vacuum pump runs continuously, even with the engine off in some cases
Most likely causes
- Control wire shorted to a battery-voltage line
- Pump relay contacts stuck closed
- Faulty output stage in the controlling module
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: medium
- It affects emissions.
What each character of P258D means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- 5: Speed and idle
- 8D: Specific fault in that system
Frequently asked questions
Can I keep driving with code P258D?
If the car is running normally, drive in moderation to a repair shop. If it loses power or another warning appears, do not continue.
What causes code P258D?
The most common causes are: control wire shorted to a battery-voltage line; pump relay contacts stuck closed; faulty output stage in the controlling module.
Related codes
- P258AVacuum Pump Control Circuit A/Open
- P258BVacuum Pump Control Circuit A Range/Performance
- P258CVacuum Pump Control Circuit A Low
- P25F1Vacuum Pump Control Circuit B High
Sources
- law.cornell.edu: 13 CCR 1968.2
- fordservicecontent.com: OBDSM1901 HEV
- static.nhtsa.gov: MC 10226008 9999
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.