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Almost every modern diesel pickup, semi-truck, and heavy-duty work vehicle shares one feature: a turbocharger. That is not a coincidence. Turbo diesel technology is the reason a modest-sized diesel engine can pull heavy loads, climb grades, and still return reasonable…
Glow plugs are small electric heaters built into the cylinder head of most diesel engines. Their job is simple but critical: they heat the air inside the combustion chamber so the engine can start when it is cold. Without working…
A diesel fuel system is the complete network of parts that stores diesel fuel, cleans it, pressurizes it to extreme levels, and injects it into the engine at precisely the right moment. On a truck, this system does far more…
When an OBD2 scanner displays a code from the P0300 series, it is reporting one thing above all others: the engine is misfiring. The P0300 family — from P0300 through P0312 — is one of the most common and most…
The P0000 Series represents the very first block of standardized powertrain diagnostic trouble codes (DTCs) in the OBD2 system. When a vehicle’s computer detects a problem, it stores a code that helps technicians and vehicle owners identify the issue. However,…
The P0400 series of OBD2 trouble codes is one of the largest families of diagnostic codes a vehicle can set. Every code between P0400 and P0479 points to an emissions control system — the parts responsible for keeping exhaust gases…
The OBD2 diagnostic trouble P0500 code stands for “Vehicle Speed Sensor A Circuit Malfunction.” When a vehicle’s computer (the Engine Control Module or ECM) detects a problem with the signal it receives from the primary vehicle speed sensor, it triggers…
Disclaimer: This article is general information only. For anything specific to your vehicle, follow your owner’s manual and consult a qualified technician. Throughout this guide, you may see Bilal and Omar discussing vehicle systems, maintenance procedures, and troubleshooting situations. They…
A code from the P0200 series is one of the more specific messages your engine computer can send. It means the powertrain control module (PCM) — the main engine computer — has detected an electrical fault in a fuel injector…
The battery light is one of the most recognizable symbols on a dashboard — a small red battery outline with plus and minus terminals — yet it is also one of the most misunderstood. Many drivers see it and immediately…