C054A

Vacuum Sensor A Range/Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Deterioration of brake performance
Unstable idle
Check Engine Light Illuminates
Reduced efficiency of the EGR system

Causes

Vacuum sensor A fault
Open or shorted wiring harness
Damage to vacuum lines
Vacuum pump malfunction
Problems with the EGR system

How to Fix

Check vacuum sensor A for damage
Check the integrity of the wiring harness and contacts
Inspect vacuum lines for leaks
Check the operation of the vacuum pump
Check the EGR system for malfunctions
Replace faulty components

Related codes

P0301 P0302 P0401 P0171