Why won't my scanner read codes?
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 code reader?
1:082:27How to Diagnose and Clear a Check Engine Light - YouTubeYouTubeStart of suggested clipEnd of suggested clipPosition then locate your obd2 port under your dash ours is towards the left. Side. Once it'sMorePosition then locate your obd2 port under your dash ours is towards the left. Side. Once it's connected you're able to read your codes. Then use the red erase button to clear your codes.
Why can't I read codes on my car?
If your check engine light is on but can't see any codes, it's most likely due to having the wrong scanner or one that is incompatible with your vehicle. There could also be an electrical short or blown fuse causing the light to come on for no reason.
Why wont my OBD connect?
Check for corrosion or debris in the plug. Check the cable itself for damage, and check the plug at the scanner too. Finding a problem with the plug or cable is easy to fix. Most good scanners will have a detachable and, therefore, replaceable OBD cable.
How long does it take for a car computer to reset?
Here's something you probably don't know: after clearing the car's computer you will need to drive for about 50 to 100 miles. As you drive your car the computer will monitor all the sensors and register the results.
How do I turn off the check engine light without a scanner?
To reset a check engine light without a scanner, disconnect the negative battery cable and wait a few moments. This will reset the diagnostic system in your vehicle, and if the underlying issue has indeed been resolved, the light should go off immediately.
Where is the fuse for the OBD?
Your vehicle will likely have multiple fuse boxes fitted, three is common. One under the hood, one in the trunk, and another behind the dashboard. The OBD fuse may be listed on the fuse cover as OBD II, DLC, Accessory port, 12 v power point or cigarette lighter and will most likely be located inside the vehicle.
Why is ECM not communicating?
If the programming is present or you are trying to program the module, and it still will not communicate with your scan tool or laptop, the issue could be with the OBDII connector under the dash. Often, the connector can be damaged if the scan tool or code reader has been pushed in and out frequently.
How do you manually check engine codes?
Flip your car's ignition on and off a couple of times without cranking the engine and finish with the key in the on position. Your car will then check for any saved trouble codes. All the lights on the dash should light up until one remains on—usually the “service engine” light.
How do I test my OBD port?
With a multimeter set to “ohms” check the resistance between these two terminals (the ignition must be in the off position / key removed) as shown. If there is 60 ohms (+/- 2 ohms) your vehicle is equipped with CAN communication and the gaugeART CAN OBD Link is compatible with your vehicle.
Does car have to be running to use OBD2 scanner?
Always turn the ignition on or have the car running according to the instructions in the manual. Failure to do this might corrupt the scanning software. It's also very important that you drive around with the manual for the specific scanner model that you're using.
Why do I have a check engine light on but no codes?
0:283:515 Reasons Check Engine Light is On but No Codes - YouTubeYouTubeStart of suggested clipEnd of suggested clipWrong code scanner each code scanner is unique there are many inexpensive diagnostic scanners on theMoreWrong code scanner each code scanner is unique there are many inexpensive diagnostic scanners on the market that can read the most elementary codes.
How do you reset the check engine light on a Autozone scanner?
0:131:28CLEAR YOUR CHECK ENGINE LIGHT IN 2 MINUTES! - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd it's really easy to reset all you need to do is remove the negative battery terminal. Leave itMoreAnd it's really easy to reset all you need to do is remove the negative battery terminal. Leave it unplugged for about 15 seconds.
How do I manually reset my car computer?
1:022:54How to Reset Your Car's Computer, Old School Scotty Kilmer - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo start the vehicle. And put it in neutral. Let it run for about four minutes in neutral. Then youMoreSo start the vehicle. And put it in neutral. Let it run for about four minutes in neutral. Then you put it in the low gear not drive but low gear leave your foot on the brake.
How do I permanently delete OBD codes?
The only way to clear a PDTC is to fix the underlying problem with the vehicle that originally caused the PDTC and its corresponding DTC to set, and then allow the vehicle sufficient drive time to re-run the monitor that identified the problem in the first place.
Will disconnecting battery clear codes?
Disconnecting the battery will not clear any codes in memory of the computer for stored OBD2 codes. The only way to clear the codes is to use a scanner and use the code clear function.
Why is my scan port not reading?
Another reason for getting no reading is that the scan port has become clogged with dust after years of not being used. You shouldn't use a spray cleaner or anything else that could get the port wet, but wiping it with a soft cloth or blowing compressed air across it could help clear out anything that might be preventing your scan tool from getting a good reading.
Why is my OBD code not a blown fuse?
Blown Fuse. 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. On many cars, the engine control module (ECM)—also called the engine control unit or electronic ...
