Sensor Locations and Terms
When running diagnostics with Check Engine™
...it is important to understand the most common terms and definitions. Sensor location helps to identify the physical location of the reporting sensor. This is vital in mapping trouble codes and/or test results to the actual component/sub-components producing the result.
NOTE: This information however, does not conclude that the component producing the result is the failing component. For more information on reasons for failure, please refer to your vehicle manual or your technician.
Sensor location displayed on the Test Results Screen
Sensor Location displayed on the Diagnostic scan Page
Sensor Location displayed on the Component Test Report
Sensor Location
Location of a sensor in relation to the engine flow, starting from the fresh air intake through to the vehicle tailpipe or fuel flow from the fuel tank to the engine in numbering order of 1, 2, 3
V6/V8/V12 Cylinder Engine with 2 Exhaust banks and 4 Catalysts
V6/V8/V12 Cylinder engine with 2 Exhaust Banks and 3 Catalysts
V6/V8/V12 Cylinder engine with 2 Exhaust Banks and 3 Catalysts
V6/V8/V12 Cylinder engine with 2 Exhaust Banks and 3 Catalysts
Left/Right and Front/Rear
Components are identified by their position as can be viewed from the drivers seating position.
Component Indication by Letters A, B
When components are indicated by a letter, for example A, B, C etc, this would be manufacturer defined, starting with component A.
Intermittent/Erratic
The signal is temporarily discontinuous, the duration of the fault is not sufficient to be considered open or short or the rate of change is excessive.