Fuel Trim Mastery
Learn how to interpret Short Term (STFT) and Long Term (LTFT) fuel trims to find vacuum leaks and fueling issues before they trigger a P0171 code.
Read Full GuideCAN Bus Architecture
An introduction to the Controller Area Network (CAN) bus and how OBDAssistant fingerprints your vehicle's specific baud rate and protocol.
Read Full GuideO2 Sensor Volatility
Narrowband vs. Wideband logic. Learn how to diagnose a 'lazy' O2 sensor by analyzing cross-count frequency in the live data stream.
Advanced GuideEmissions Readiness
How to complete 'Drive Cycles' for EVAP, Catalyst, and O2 monitors. A technical guide to getting your vehicle ready for state inspections.
Readying GuideECU Knock Logic
Understanding Feedback Knock Correction and Fine Learning Knock Correction. How the ECU pulls timing to protect your cylinders.
Technical PaperThe Sentinel Engine
Understanding the neural network layers behind our diagnostic insights and how we verify mechanical health with 94%+ accuracy.
White Paper