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There are 4 EGT sensors and I believe they are labeled 11, 12, 13, and 14 (front-to-back). I only monitor 13 at the DPF and 14 aft of the DPF. Average temp I see is between 450-575. During regen, 13 gets up to 1,200 with 14 showing just over 1,000. I believe 11 & 12 remain below these numbers. Since all of the heat culminates in the DPF, that's why I watch 13 closest.