P1428: EGI Mini - MAF Failed Open Circuit

What does P1428 mean?

P1428 is a diagnostic trouble code indicating "EGI Mini - MAF Failed Open Circuit". This means there is an electrical break in the air flow sensors wiring — a connector may be unplugged, a wire broken, or a component has failed internally. The ECU detected no signal where it expected one.

Symptoms you may notice

• Check engine light (MIL) illuminated on dashboard
• Intermittent warning lights
• Erratic gauge readings

Common causes

• Damaged or corroded wiring harness
• Loose or disconnected electrical connector
• Failed air flow sensors sensor or actuator
• Blown fuse in the related circuit
• Poor ground connection

What should you do?

This is a significant issue that should be diagnosed and repaired soon. Avoid long trips or heavy driving until the problem is resolved. Continued driving may cause additional damage.