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Read and reset fault codes from your vehicle

Read and reset fault codes from your vehicle

The AutoPi IoT platform is much more than your regular OBD-II dongle. But that doesn’t mean that it isn’t able to perform all of the same things a regular OBD-II dongle does (plus much more). One of the common things you would do is to read out details about fault codes in your vehicle. In this blog we will go over the details on how this is done with the AutoPi and how you can combine fault codes with triggers to make automatic alerts.

Getting a diagnostics fault code on your dashboard can be frustrating and confusing, because the Malfunction Indicator Light (MIL) doesn’t precisely describe to problem or the severity of the problem. A common example of this is the Check Engine Light:

Check Engine Light
Check Engine Light

The Check Engine Light can indicate 30 or more different faults on your vehicle, depending on your make and model. Sometimes the light will indicate more than one issue at the same time. The light will normally tell you to bring your vehicle to a mechanic and then he will use an external tool to readout the specific fault codes. But sometimes you may be able to save a few bucks by fixing and clearing the error on your own. This is something you can do with AutoPi.

Reading error codes

When you are driving, the AutoPi will automatically log all diagnostic trouble codes (DTC), together with a timestamp and the GPS position. This means that you will also be able to see where on your trip the DTC became active and also where it became inactive (if it went away on its own), no more driving to the mechanic and leaving because he couldn't see any issues. This is all shown on a map on your trips page, so you can easily get an overview of it:

Diagnostics codes shown on map
Diagnostics codes shown on map

Another advantage of using the AutoPi, is that it will show you a precise description to the error code, a severity range and also give you a possible solution to the problem. When the indicator light goes on during a live trip, your precise error, severity and possible solution will be shown in a widget on the dashboard:

Diagnostics codes shown in widget
Diagnostics codes shown in widget

You are then also able to cross reference the error code with any other logged information. Like if the time of the DTC occurring, matches the spike on the accelerometer, you may have a loose or faulty sensor - and your mechanic can use this information to get a fix on the real issue.

Resetting error codes

For some error codes it might be possible to fix the error on your own, if you know what you are doing. Or sometimes you get an error code with a low severity, which you don't need to react on right now because there is nothing to fix. For this, it is possible to reset error codes directly from the AutoPi Cloud. The error codes, and all details will still be present in the dashboard, but will be marked as cleared, and of course no longer visible in the car.

Resetting of error codes is very easy with AutoPi. Just open up your dashboard, find the widget containing error codes and press the clear button.

Please note: Resetting an error codes do not mean the issue has been resolved. We recommend you investigate and take all error codes seriously. Contact a mechanic if you are not sure what you are doing.

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