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SCR vs EGR: Which System Causes More Diesel Problems?

SCR vs EGR: Which System Causes More Diesel Problems?

February 13, 2026

SCR vs EGR: Which System Causes More Diesel Problems? Quick answer: EGR faults tend to cause drivability issues like hesitation, smoke, and poor economy. SCR faults often lead to warnings, countdowns, and no-start risks. Both fail differently, and fixing the wrong one wastes time and money. Modern diesel engines rely

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