Cannot diagnose P0420 code on Volvo XC90 without replacing expensive catalytic converter to confirm root cause.

Workarounds Described

• Manually interprets O2 sensor voltage patterns to guess cat condition
• Replaces expensive parts (cat) to test theory

Implied Software Gaps

• Automated catalytic converter efficiency analyzer using O2 sensor waveform patterns

CatCheck Pro

Handheld diagnostic tool that uses advanced waveform analysis on O2 sensor data to precisely evaluate catalytic converter health. Avoids costly guesswork by providing a clear pass/fail or degradation score based on OEM specifications.

Existing Solutions Mentioned