P1118: Manifold Absolute Temperature Circuit Low Input

What does P1118 mean?

P1118 is a diagnostic trouble code indicating "Manifold Absolute Temperature Circuit Low Input". The ECU is detecting a voltage reading that is below the expected range in the air flow sensors circuit. This typically points to a wiring short, a faulty sensor, or a grounding issue.

Symptoms you may notice

• Check engine light (MIL) illuminated on dashboard
• Engine overheating
• Temperature gauge reading high
• Heater not working properly
• ABS warning light on

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?

Schedule a diagnostic appointment at your earliest convenience. The vehicle is generally safe to drive short distances, but the underlying issue should be addressed to prevent it from worsening.