Does the OBD system use more than lights to communicate w...

Q: Does the OBD system use more than lights to communicate with the driver?

asked by on November 25, 2015

Are lights the only thing the OBD uses to warn the driver of issues?

Malfunction Indicator Lamps (MIL) and audible alarms are currently the only means by which the On-Board Diagnostics (OBD) system can inform the driver of any issues that adversely affect the operation of the engine or other electronically controlled system.

The MIL, or Check Engine Light, being illuminated doesn’t automatically mean that your car is about to break down. It does mean that the Powertrain Control Module (PCM) has detected a failure that is causing your tailpipe emissions to exceed acceptable limits. Basically, the MIL is telling you that you are polluting the air. You need to have a trained technician check the OBD system to determine what issues the PCM has detected and to have them addressed. Not only will your engine run efficiently, but you won’t be polluting the atmosphere, either.

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

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

Failed smog test. OBD-II monitors not ready. Needs to be reset

Hello. If your monitors are showing not ready, then that is because the computer was recently reset or the battery may have been replaced. If either of these occurred, then there is a specific amount of driving that needs to...

OBD support

Hey there. If you have the OBD-2 connector under the dash directly under the steering column, then the ELM327 will work to scan the vehicle after you download the app. I can tell you that this adapter is very cheaply...

vehicles stalls both while driving and idle, will hesitate to start. howvever sometimes starts and runs without issue. P008B

The p008B code that you listed refers to the low pressure fuel system. For some reason the engine control module is receiving a signal that shows high pressure in the system. This could be caused by a failed low pressure...

Related articles

B1898 OBD-II Trouble Code: Chime Input #2 Circuit Short to Ground
B1898 means there is a circuit issue with chime input 2, most likely due to a damaged electrical component.
What Is the On-Board Diagnostics (OBD) System?
Your Your car contains a vast number of different systems, all of which must work in harmony to ensure proper operation. There must be a way to monitor your ignition and emissions systems and the On-Board Diagnostics (OBD) is a...
B1300 OBD-II Trouble Code: Power Door Lock Circuit Failure
B1300 means there is an error with the power door lock circuit, likely caused by a defector power door lock relay or power door lock actuator.