We tested popular wideband O₂ controllers against lab-grade equipment to see how accurate their lambda readings really are under real engine conditions.

Modern engines are packed with technology, yet the core hardware still follows a simple logic: air and fuel go in, power comes out, and heat must be controlled. When I understand the main components ...

The P0118 code means that the engine control module (ECM) has detected a voltage signal that’s too high from the engine coolant temperature (ECT) sensor (below). In practical terms, the ECM believes ...