MechaOBDTHE REPORT, UP CLOSE
Less mystery.
More context.
A look inside a MechaOBD Diagnostic Report, using the app’s demo vehicle. Explore the findings and see how the evidence leads to a next step.
Download sample PDF2015 Toyota RAV4
2.5L 4-cylinder · Guided Health Check
Three codes. One possible connection.
The engine is running lean, and the vehicle is also reporting a fuel-vapor system leak. Taken together, the captured data points toward the purge circuit as a likely place to investigate.
A stuck-open purge valve or damaged hose could explain the pattern. Testing the circuit can help distinguish between them before replacing parts.
A place to start. Not a parts shopping list.
EVAP purge valve
A valve that stays open can let unmeasured air into the intake while preventing the vapor system from sealing.
Purge hose
A disconnected or cracked hose could produce a similar pattern. Inspection and testing help tell the difference.
These are hypotheses from one demo capture, not confirmed component failures.
The readings help connect the dots.
During the demo’s warm-idle window, the engine computer was adding substantial fuel. That supports the lean-condition code. The simultaneous vapor-system codes make the purge circuit worth investigating.
The higher-RPM data was brief and sparse. This capture cannot settle every possible cause.
Bring a better question to your mechanic.
Download the sample PDFABOUT THIS EXAMPLE
The reasoning matters.
This example is adapted from a prerecorded 2015 Toyota RAV4 demo capture. It shows a lean-condition code alongside two fuel-vapor system codes. Those codes and the captured fuel-trim readings suggest the purge circuit as one possible connection.
A useful report also explains what the capture cannot tell you. Here, higher-RPM data was limited, and the suspected component still needs testing. The report is a starting point for investigation, not a confirmed repair.
See why your vehicle’s context matters ↗
This sample is not a diagnosis of your vehicle or a guarantee of its condition. Available data and report findings vary by vehicle and capture.
Ready to understand your own car?
Explore your vehicle’s data with MechaOBD for iPhone and iPad.