OBD Guide

C054F

Vacuum Sensor B Circuit Low

C054F is an OBD-II diagnostic trouble code meaning: Vacuum Sensor B Circuit Low. Common causes: vacuum sensor b fault, open or short circuit in wiring harness. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Unstable engine operation
  • Increased fuel consumption
  • Check Engine Light Illuminates

Causes

  • Vacuum sensor B fault
  • Open or short circuit in wiring harness
  • Poor contact in connectors
  • ECU malfunction

How to Fix

  1. Check the integrity of the wiring harness
  2. Check vacuum sensor B connectors
  3. Replace vacuum sensor B if necessary
  4. Check the power supply and ground of the sensor

Related codes

Error C054F by Vehicle Brand

FAQ

What does the C054F code mean?

C054F is an OBD-II diagnostic trouble code that indicates: Vacuum Sensor B Circuit Low

What causes a C054F error code?

The most common causes of C054F include: Vacuum sensor B fault; Open or short circuit in wiring harness; Poor contact in connectors; ECU malfunction.

How do I fix a C054F diagnostic trouble code?

To fix C054F: Check the integrity of the wiring harness. Check vacuum sensor B connectors. Replace vacuum sensor B if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C054F?

Limited driving only, diagnose soon

How much does it cost to fix C054F?

The estimated repair cost for C054F is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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