Abstract: A system and method for engine parameter trending in which the engine control module (ECM) periodically stores to non-volatile memory various engine operating parameters over the life of the engine. The system is configurable such that a variable number of samples of a variable number of engine parameters can be stored. In addition to storing each engine parameter, each write to non-volatile memory is also time stamped. This data is used to track the health of the engine over its life cycle. Such data can be useful in providing decreased down time due to increased troubleshooting ability. The system includes a variable number of calibratable predetermined trigger points available so that the data is always logged under the same operating conditions. All triggers must be satisfied for a specified time in order to ensure consistent engine operating conditions when each data set is taken.