Sample report
The reasoning, not just the answer.
A written sample of a DeepDiag AI analysis. The screenshot below is from the app with vehicle identifiers redacted; the text follows what it shows.
The symptom
“Air conditioning not as cold as last year.”
What the scan found
- Stored codes
- 0
- Pending codes
- 0
- Permanent codes
- 0
- Check engine light
- Not commanded
- Supported readiness monitors
- Complete
- Climate control module
- Not addressable on this connection
The deep scan found no engine-management faults. That is useful: it rules out the compressor-clutch circuit, the pressure-sensor circuit and the engine codes Honda says to check before A/C troubleshooting.
What the AI said
MEDIUM confidence
The most likely cause, but not proven. Confirm it before buying parts.
“Most likely a slow refrigerant leak causing a low charge — the classic cause of A/C that gets gradually less cold over a year with no fault codes. A dirty condenser or a weak compressor are the next most likely, but the data points first at charge level.”
What the data does not show
The climate control module did not answer on this connection. DeepDiag therefore cannot read A/C-specific fault codes or the module's own pressure readings. The scan also cannot measure how cold the vents actually get.
A car that is simply undercharged will usually set no codes at all, because the pressure sensor still reads a plausible value; it just reads low. That is why this diagnosis stays at MEDIUM confidence and points to checks rather than a part.
What to check before buying parts
- Vent temperature test: thermometer in the centre vent, A/C on max, recirculate, ten minutes. Compare driver and passenger vents; a split over 11°C means an air-mix door issue, not a charge issue.
- Compressor clutch: with the engine running and A/C on, does the clutch engage and stay engaged, or cycle rapidly? Rapid cycling points to overcharge or a fan/evaporator sensor issue; no engagement points to the clutch circuit.
- Manifold gauge pressure test: the check that can distinguish a low charge from a failing compressor before parts are replaced.
Outcome
No repair outcome was recorded for this sample.
Want the full feature set? See what DeepDiag does or see pricing.