Code result
P258A
Vacuum Pump Control Circuit A/Open
Moderate severity
What it means
The control circuit driving the electric vacuum pump (used to maintain brake-booster vacuum on direct-injection or hybrid powertrains where the engine is not always running) is open. The ECM cannot run the pump on demand — booster vacuum drops, pedal feel hardens, brake assist may be reduced.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Open control wire to the pump
highOne of the most commonly reported causes for this code — check this first.
Failed driver in the control module
mediumA plausible cause — test and verify before replacing parts.
Related help
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