Malfunction Indicator Lamp (MIL)
The malfunction indicator lamp, or check engine light, warns of an emission-related fault in the engine or transmission system.
What is Malfunction Indicator Lamp (MIL)?
It lights briefly at ignition on as a bulb check. A steady lamp means a fault is stored; a flashing lamp signals severe misfire that can damage the catalyst. It is controlled by the engine control unit following OBD rules.
How it works
When a confirmed emission fault is stored, the control unit switches on the lamp.
Why it matters for your car
A flashing lamp means reduce load and have the car checked soon. Reading the code is the first step; many causes are simple.
Other terms
- Automatic Climate Control
- Battery Cell
- Brake Squeal
- Breakaway Cable
- Charging Curve
- Heated Door Mirrors
- High-voltage Interlock Loop (HVIL)
- Ignition Advance
- Network Sleep Mode
- NOx Sensor
- Oil Sump (Oil Pan)
- Open Loop (Engine Control Mode)
- Permanent Code
- Positive Earth Electrical System
- Privacy Glass
- Propeller Shaft Centre Bearing
- Throttle Position Sensor (TPS)
- Tonneau Cover
- Tyre Rotation
- Wiring Diagram (Circuit Diagram)