Why is my OBD2 port not communicating?

Why is my OBD2 port not communicating?

In most cases, communication issues can be caused by various reasons including: ignition-key position, connector-voltage issues, incorrect communication protocol, hung ECM, missing or bad data, and OEM-updated ECM software that is unknown to the scan tool.

How do you reset OBD2 codes?

How to Clear OBD-II Codes

1. Hook an OBD-II scanner to the car’s diagnostic port. This outlet is on the driver’s side, under the dash and usually near the steering wheel.
2. Turn the scanner on.
3. Turn the car on.
4. Wait for the trouble code to appear on the scanner. Press the “Clear” button on the scanner to clear the code.

How do I turn on OBD2?

Plug the standard OBD2 connector into the vehicle’s port located under the driver’s side of the dashboard. Turn on the car to power the scan tool or code reader. If necessary, enter any vehicle-specific information requested. Many tools will ask for the Vehicle Identification Number (VIN).

How do you power up OBD2?

-If your scan tool has an external plug for power then you simple feed it 12VDC. -If your tool does not have external power supply port then you can power it using 12VDC with + clipped to pin 16 and – clipped on pins 4 & 5 inside the tools obd2 connector.

Why won’t my scanner read codes?

If you’ve plugged into your car’s diagnostic port and aren’t reading anything, you might think that your OBD-II brain has been fried, but don’t declare it dead yet. The most common reason for getting no OBD code is simply a blown fuse. Check your fuses to see if any have gone bad.

What is OBD communication failure?

If the cigarette lighter fuse is burned out, the vehicle will not communicate with the test equipment during the OBD inspection. The fuse is faulty if it is dark inside like the inside of a blown light bulb or if the electrical wires within the fuse are burnt apart and not connected.