P257C

Vacuum Reservoir Control Circuit High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine Light Is On
Deterioration of the brake system
Unstable engine operation at idle
Increased fuel consumption
Reduced engine power

Causes

Open or short circuit in control circuit
Vacuum reservoir sensor malfunction
Damage to connectors or corrosion of contacts
Solenoid valve malfunction
Problems with the engine control unit

How to Fix

Check the integrity of wiring and connectors
Test the vacuum reservoir sensor
Check the operation of the solenoid valve
Replacing faulty components
Reset the error code and check if it returns

Related codes

P257B P257D P257E