If your 2009 Ford Fusion is flashing a P0400 code, it means your Exhaust Gas Recirculation (EGR) system isn’t flowing as it should. This can lead to rough idling, reduced fuel efficiency, and higher ...

If your diesel’s check engine light is on and you’ve pulled a P245A code, your EGR cooler bypass control circuit might be the culprit. This system helps control exhaust gas temperatures and emissions, ...

PACCAR has been granted a patent for a method involving a heavy-duty truck’s diesel engine and exhaust after-treatment system. The system includes selective catalytic reduction systems and NOx sensors ...