Q: Q: What does the malfunction indicator Warning Light mean?

asked by on

What does the malfunction indicator Warning Light mean?

The malfunction indicator Warning Light is on your instrument cluster. It illuminates when the On-Board Diagnostics-Second Generation (OBD II) system detects an issue. The OBD II system monitors your vehicle’s emissions. When the malfunction indicator Warning Light is illuminated, it means that the OBD II has noticed that your vehicle is not running as cleanly as it should. If the light is flashing, then the OBD II system has detected a misfire. If the light is solidly illuminated, then the OBD II system has detected an emission control system malfunction.

Tip

Like all warning lights, the malfunction indicator Warning Light will illuminate when the ignition is turned on but the engine is not yet running. You should only be concerned with the malfunction indicator Warning Light if it stays lit after the engine has been turned on.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: What does the malfunction indicator Warning Light mean?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I have a 1986 Chrysler Laser turbo with 13700 miles that failed emissions. Do oxygen sensors go bad from sitting around too long?

Wow, I almost bought one of these new back in 1986. It is possible that due to age, any number of sensors can be bad, even without a Check Engine Light being set. The best way to determine that is...

Q: Car has electrical problems and starting issues

My guess is that the problem is with the body control module (BCM). The BCM functions as the power mode master (PMM). In this role, it receives an input from the ignition switch when the key is turned to the...

Q: I changed my map sensor and my car is still idling rough and stalls at a stop light. The acceleration is better and the engine lig

Hi there. Sometimes a problem with a MAP sensor is masking other issues that might have existed the entire time. In most cases, when a car is slow to accelerate, it is caused by clogged fuel injectors, dirty throttle body...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.