C0550

Vacuum Sensor B Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–89 (est.)

Symptoms

Check Engine Light Is On
Deterioration in braking performance
Unstable engine operation at idle
Reduced engine power

Causes

Open circuit in vacuum sensor B
Short circuit to power in wiring harness
Vacuum sensor B fault
Connection problems or contact corrosion
Engine control unit (ECU) malfunction

How to Fix

Check the integrity of the sensor wiring harness
Measure resistance and voltage at the sensor
Check the connections and contacts of the sensor
Replace vacuum sensor B if necessary
Test the operation of the system after repair

Related codes

C0545 C0555 P0107 P0108