OBD-II code · Chassis
C0548 Vacuum Sensor Supply Voltage Low
Vacuum sensor supply voltage below expected range.
Is it safe to drive with C0548?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySupply wire shorted to ground
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Vacuum Sensor, Sensor Supply
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.