There are many hand-held car code scanner in Home Depot or on Amazon. You can read the codes and sometimes clear the codes with these tools, but the information is limited. You have to record the codes and search for more information before you can do anything. These devices sometimes provide rich information and have a better interface. Here we introduce the guide to read OBD2 Codes using a mobile device-based tool :. The OBD-II port is usually located under the dashboard, beneath the steering wheel column in the diagram below.
If not located beneath the steering wheel column, look for the port in the areas indicated by numbers When the scanner is paired with your phone, the App will show the diagnostic results. The formats are shown below:. Watch the "Check Engine" light on the dash. Once the sequence has been initiated, the "Check Engine" light begins to flash. Record the codes as they flash.
Pending codes mean that the OBD-II monitoring system has failed the operation of an emission control system at least once and if it fails again the Check Engine Light will be turned on and the malfunction becomes an Active code.
Each throws a very distinct code which will not shut itself off until the issue is fixed. If the condition that caused it to come on is a minor fault, and stops occurring, then yes, it will clear itself. If the condition indicates a larger problem, then it will stay on until cleared manually. There are eight: 0 — Fuel and air metering and auxiliary emission controls. Codes starting with 0 as the first digit are generic or global codes.
It means that they are adopted by all cars that follow the OBD2 standard. These codes are common enough across most manufacturers so that a common code and fault message could be assigned. Ignition key on, start the vehicle, and let it idle for at least 30 seconds. Then, without cycling the key, drive the vehicle at least 25 mph or faster for at least 5 minutes. All circuits and components should be thoroughly tested before replacement of any component.
The first character of the five digit code is a letter , it defines the section, or system in the vehicle which the rest of the code is referring too. The letter codes are: P — B — C — and U.
Press Read or Enter on the scanner depending on the scanner model that you have. Look at all the systems.
The battery disconnect method will work on most vehicles. Some late model vehicles will not clear trouble codes by disconnecting the battery. On these vehicles trouble codes are stored in the ECM's ROM, and only a scan tool will clear trouble code s and turn off the check engine or malfunction indicator lamp MIL. If the MIL yellow engine icon turns off abruptly after 20 seconds, then you know the DTCs have been reset by the engine monitoring system and not by a scan tool or by disconnecting the battery.
There may in fact be nothing wrong with the vehicle; the computer simply needs to complete its checks. One week of combined highway and city driving is normally enough to reset the system and provide an accurate reading of vehicle performance. What does 0 DTC mean on a code reader? Category: business and finance pharmaceutical industry. How can I read my car code without a scan tool? Insert the key into the ignition. What are pending DTC codes?
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