P257A

Vacuum Reservoir Control Circuit/Open

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine Light Is On
Reduced braking system efficiency
Unstable engine operation at idle
Increased fuel consumption

Causes

Broken wires in the control circuit
Solenoid valve malfunction
Damage to the vacuum tank
Poor contact in connectors
Engine control unit malfunction

How to Fix

Check the integrity of wiring and connectors
Test the solenoid valve
Inspect the vacuum tank for damage
Check the operation of the vacuum pump
Scan the control unit for other errors

Related codes

P257B P2579 P2578