P258C Possible Causes
- Faulty vacuum pump control
- Vacuum pump control harness is open or shorted
- Poor electrical connection in vacuum pump control circuit
How to Fix Code P258C
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
Illuminated engine light (or service engine soon warning light)
P258C Meaning
The Powertrain Control Module (PCM) monitors the signal from the vacuum pump control circuit. The PCM sets the OBDII code when the vacuum pump control circuit signal is outside factory specifications.