C0548 — Vacuum Sensor Supply Voltage Low

What Does C0548 Mean?

C0548 is a diagnostic trouble code indicating: Vacuum Sensor Supply Voltage Low. This code relates to the chassis system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of C0548

⚠️ Check Engine Light (MIL) illuminated
⚠️ Vacuum Sensor Supply Voltage Low not functioning as expected
⚠️ Related system may be in fail-safe mode
⚠️ ABS or stability control warning light

Common Causes

🔍 Faulty Vacuum Sensor Supply Voltage Low
🔍 Wiring or connector issue in Vacuum Sensor Supply Voltage Low circuit
🔍 Related mechanical or electrical fault
🔍 ECM/PCM issue (rare)

Frequently Asked Questions

What does C0548 mean?

C0548 indicates: Vacuum Sensor Supply Voltage Low. The vehicle's computer has detected that the Vacuum Sensor Supply Voltage Low is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code C0548?

Only short distances if absolutely necessary. C0548 affects a critical system and should be diagnosed within a few days to avoid further damage.

How much does it cost to fix C0548?

Repair costs for C0548 typically range from $100 to $400, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect Vacuum Sensor Supply Voltage Low and related wiring
🔧 Replace faulty Vacuum Sensor Supply Voltage Low

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

C0548: Vacuum Sensor Supply Voltage Low