When a warning light appears on the car's dashboard, it's common to be unsure about what's really happening. The good news is that today your cell phone can help identify various vehicle faults before you even take it to a repair shop. With an automotive diagnostic app and a small adapter connected to the car, it's possible to access information from the electronic control unit, check error codes, and monitor various sensors in real time.
App to discover car problems
One of the options for this purpose is Car Scanner ELM OBD2.
The app transforms the smartphone into a kind of automotive scanner. It communicates with the vehicle's electronic control unit via a compatible OBD2 adapter, allowing the user to view information that is normally only available through diagnostic equipment.
Among its main functions are:
- Reading OBD2 fault codes;
- Description of the error codes encountered;
- Real-time sensor monitoring;
- Engine temperature;
- Engine revolutions;
- Fuel consumption;
- Performance information;
- ECU data;
- Verification of certain emission parameters;
- Creation of customized dashboards;
- Possibility of clearing certain fault codes after the problem has been resolved.
The amount of information available depends on the model and electronic control unit of each vehicle.
Car Scanner ELM OBD2
What is needed to use the app?
To perform a complete diagnosis, simply installing the application is not enough. It is necessary to use a Compatible OBD2 adapter, such as models based on the ELM327 standard.
This small device is connected to the vehicle's OBD2 diagnostic port. After that, it transmits the car's information to the smartphone via Bluetooth or Wi-Fi, depending on the adapter used.
The OBD2 port is usually located in the lower part of the dashboard, near the steering wheel, although its position may vary depending on the vehicle.
How to find car problems using your cell phone.
The process is relatively simple.
First, connect the OBD2 adapter to the vehicle's diagnostic port. Then, turn on the ignition and activate your mobile phone's Bluetooth or Wi-Fi.
Open the Car Scanner, select the connection type, and configure the profile corresponding to your vehicle. After communication with the control unit is established, look for the option to... fault codes or DTCs.
The application will read the information stored in the ECU.
If a problem is reported, a code similar to the following may appear:
P0300, P0171, P0420 or P0130.
These codes help identify which system experienced an abnormality.
Is it possible to find out why the check engine light came on?
In many cases, yes.
When the check engine light comes on, the electronic control unit may store a code related to the detected problem.
The application can query these codes and present information that helps to understand the possible origin of the failure.
This could involve systems related to sensors, fuel mixture, ignition, emissions, or engine operation, depending on the code recorded.
Monitor your car's sensors in real time.
Another interesting function of the Car Scanner is to view information while the vehicle is running.
Depending on the vehicle, data such as the following may be available:
- Coolant temperature;
- Engine RPM;
- Speed;
- Air pressure and flow;
- Electrical voltage;
- Fuel consumption;
- Throttle position;
- Data from probes and sensors;
- Calculated engine load.
This allows you to monitor the vehicle's behavior and notice changes that might go unnoticed just by looking at the dashboard.
Does the app replace a mechanic?
No.
The application should be used primarily as a diagnostic and informational tool. An error code indicates the system in which a particular abnormality has been registered, but it does not always reveal on its own which part needs to be replaced.
For example, a code related to fuel mixture can have different causes.
Therefore, avoid buying or replacing parts based solely on the code displayed by the app. For significant faults, a professional diagnosis is still recommended.
Is it possible to turn off the check engine light?
The Car Scanner allows you to clear certain DTC codes registered in the electronic control unit.
However, clearing the code does not necessarily mean that the fault has been corrected. If the cause persists, the control unit may detect the fault again and the light may reappear.
Ideally, you should discover and resolve the source of the problem before deleting the codes.
Which cars are compatible?
The Car Scanner is primarily designed for vehicles compatible with the standard. OBD-II/EOBD.
According to the developer, most modern vehicles use this standard, although compatibility and the amount of information available may vary depending on the make, model, year, and electronic modules installed.
Is it worth using your cell phone to diagnose your car?
For those who want to better understand their own vehicle, this can be a very useful tool.
In just a few minutes, the cell phone can display fault codes and various electronic parameters of the vehicle. This also allows you to arrive at the repair shop with more information about the problem encountered.
Car Scanner has free features and offers optional in-app purchases.
Download the app
THE Car Scanner ELM OBD2 It has official versions for Android and iPhone.
📱 Android — Google Play:
Download Car Scanner ELM OBD2 for Android
🍎 iPhone/iOS — App Store:
Download Car Scanner ELM OBD2 for iPhone
