These include the one that defines all the generic Diagnostic Trouble Codes (DTCs). SAE is the organization that specifies the OBD2 standards. OBD2 Trouble Codes or Diagnostic Trouble Codes are defined by SAE (Society of Automobile Engineers). Share this post Twitter Facebook Thousands of new OBD2 Trouble Codes added! The updated mobile apps can be found from the approriate app stores using your phone. If you are using the desktop software, download the latest version from the download page. OBD Auto Doctor implements now all the new IDs in addition to the old ones. The latest OBD2 standard version added 12 new identifiers. The software has now support for all Mode $06 scaling IDs. Other improvementsĪmong the new calculated performance parameters, we also added more. Positive values are boosted by a turbocharger or supercharger. Negative pressure values represent vacuum. The default pressure value at sea level is used unless the car provides support for the actual barometric pressure. Now, the vehicle is required to support MAP (manifold absolute pressure) in order for the boost pressure to appear as supported.

Barometric pressure is also taken into consideration. Remember to set the correct weight! Boost Pressureīoost pressure value yields from the intake manifold absolute pressure. Since torque is using engine power for the calculation, the vehicle weight is a factor in the calculation. Torque is measured at the wheels just like the engine power. With these two pieces of information, the torque can be estimated quite accurately. Torque is calculated from the engine power and RPM. You could also estimate the total weight by using manufacturer defined weight added with the passenger weight, fuel weight plus any extra weight included in the vehile. To get the most accurate weight, drive your car to a weightbridge. You can set the vehicle weight in the app settings. An average drag coefficient and vehicle frontal area are used. The software will also take power loss due to drag into consideration when calculating the power.

The horsepower will be greater than zero only when the vehicle is accelerating. Therefore, if the vehicle speed doesn’t change, the power will show zero. OBD Auto Doctor measures the engine power at the wheels. The total weight of the vehicle is also needed for valid results. Read further to get insight into the details.Įngine performance sensors chart from the csv data, saved using Google SheetsĮngine power (or horsepower) can be estimated quite well using vehicle speed and its change over very short period of time. You can now measure the performance of your car by monitoring these new sensors in real time. This time our main focus was in calculated performance parameters such as Engine Torque, Engine Horsepower and Turbo Boost Pressure. A few days ago we launched the updated OBD Auto Doctor software.

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