Diagnostics

Discover the importance of Technical Service Bulletins (TSBs) in automotive repair and how they aid technicians in diagnosing and fixing vehicle issues efficiently.

Learn the key differences between generic and manufacturer-specific Diagnostic Trouble Codes (DTCs) and their role in vehicle diagnostics.

Learn how DTCs help diagnose vehicle issues with structured fault codes.

Explore the ECU's role as the 'brain' of modern vehicles, processing sensor data and controlling vehicle functions.

Explore the most common DTCs, their causes, and how to diagnose and fix them effectively.

Discover how the CAN bus system enables seamless data exchange between ECUs.

Learn how sensors collect real-time data and ensure optimal vehicle performance.

Stockholm, Sweden – CodeOC, a two-year-old AI startup aiming to revolutionize vehicle repair, has officially rebranded as WrenchLane. Team WrenchLane

Learn how O₂ sensors work, how to test them, common fault codes, and the difference between wideband and narrowband sensors. Includes pump current, upstream vs. downstream, and troubleshooting.

Most mechanics know the feeling. A car comes in with a check engine light. You pull the codes. Three fault codes stare back at you. Which one matters? Where do you start?

Most mechanics know the feeling. A car comes in with a check engine light. You pull the codes. Three fault codes stare back at you. Which one matters? Where do you start?

Electrical faults are among the hardest problems a workshop faces. A single symptom can point to dozens of possible causes, and chasing the wrong lead costs time and frustration. Most mechanics rely on experience, intuition, and trial-and-error—methods that work until they don't.