AutoTuner Update October 2026: New ECU Protocols for Trucks, BMW, PSA and EVs
AutoTuner October 2026 update roundup: TRW EMS2.3/2.4, Scania EMS S6/S8 and EMS10, Bosch MED17.4, BMW MD1/MG1 bench, Denso VEA Gen2.
How Crankshaft and Camshaft Position Sensors Work and How the ECU Uses Them for Sync
How crankshaft (CKP) and camshaft (CMP) position sensors work: inductive vs Hall-effect, missing-tooth wheels, ECU sync for injection and ignition.
How a Lambda / Oxygen Sensor Works and How the ECU Uses It for Closed-Loop Fueling
How a lambda / oxygen sensor works, narrowband vs wideband, how the ECU uses it for closed-loop fuel trim, and how to diagnose O2 sensor and heater faults.
How a MAP Sensor Works and How the ECU Uses Manifold Pressure
How a MAP sensor measures absolute manifold pressure, how the ECU uses it for speed-density load and boost control, and how to diagnose P0105–P0109 and P0069.
How a Mass Air Flow (MAF) Sensor Works and How the ECU Uses It
How hot-wire and hot-film MAF sensors measure air mass, how the ECU uses MAF for load and fueling, P0100–P0104 diagnostics, and tuning implications.
How Common Rail Diesel Injection Builds and Controls Rail Pressure
How a common rail diesel builds and controls rail pressure: pump, rail sensor, metering and pressure control valves, ECU closed loop.
How a Knock Sensor Works and How the ECU Controls Ignition Timing
What engine knock is, how a piezo knock sensor detects it, how the ECU retards timing cylinder by cylinder, and how to diagnose P0325/P0330 and false knock.
How a Variable Geometry Turbo (VGT) Works and How the ECU Controls Boost
How VGT turbo vanes work, vacuum vs electric actuators, how the ECU closes the boost loop, and how to diagnose P0299/P0234 underboost and overboost faults.
ECU Programming Tools Compared: KESS3, FLEX, AutoTuner and More
How professional ECU programming tools compare: KESS3, FLEX, AutoTuner and others, with OBD, bench and boot access explained for remapping workshops.
Why Diagnostics Must Always Come Before ECU Tuning
Why a workshop should diagnose before tuning: fault codes, mechanical condition, live data and dyno checks that decide whether a vehicle is ready for a remap.