The examination of a catalytic converter’s surface temperature, typically performed using an infrared thermometer or pyrometer, is a diagnostic procedure used to assess its operational status. Discrepancies between the inlet and outlet temperatures, or readings significantly outside expected ranges, often indicate a malfunction. For example, a lower-than-expected temperature difference may suggest catalyst deactivation or a rich fuel mixture.
This evaluation is important in diagnosing vehicle emissions issues and ensuring proper functioning of the exhaust system. Historically, technicians relied on visual inspection and exhaust gas analysis. However, temperature measurement provides a faster and often more direct indication of internal activity, potentially saving time and improving diagnostic accuracy by highlighting specific issues with the converter’s functionality and overall performance of the exhaust system.
