Skip the auto shop - Our mechanics make house calls

Q: OBD sensor not reading scanner

asked by on

My OBD sensor is not reading the scanner for an emissions test. I can't find the source of the problem.

A: This sounds like there is no power to the d...

This sounds like there is no power to the data bus network. This means that the OBD2 plug on your vehicle is not being powered by the battery. I would enlist the help of a qualified technician to find a wiring diagram for your OBD2 plug to trace wires and find where the loss of power is. This is an important repair to have done as the OBD2 system is a vital part of vehicle diagnosis. For example, if any warning lights were to appear on your dash such as Check Engine, Airbag, or ABS, these codes would not be able to be retrieved making it nearly impossible to diagnose. Having a mechanic inspect the electrical issue will allow them to move forward to a repair of your OBD system.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Backseats removable - 2015 Infiniti QX60

Hello. It is possible to remove the rear seats, however, they would need to be uninstalled completely. The rear seats are bolted down and have electric motors built into them so removal would require tools. If the QX60 does not...

Q: Nothing turns on the car

From what you've described you may just have a bad battery connection. You should first have the vehicle jump started to see if it stays running and look for any lights that may have been left on. Once the jumper...

Q: How do you make sure readiness codes are set in the computer for emissions testing?

If you live in an area where emissions testing is mandatory, you’re no doubt familiar with the hassle of not being able to test your car if the readiness codes aren’t set. Thankfully, there’s a way you can help make...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.