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<p>[QUOTE=&quot;springerj, post: 11607761, member: 143808&quot;]I’ve got a 2011 Peterbilt Paccar with low SCR efficiency. Truck was requesting parked regen multiple times a day. Replaced DPF, DOC, BPV, DEF doser and EGR valve. Had SCR Cleaned. Replaced DEF fluid and filter as well as all temperature sensors for after treatment system. </p><p><br /></p><p>During regen my temperatures are….</p><p>Before DOC 740</p><p>Before DPF 1050</p><p>After DPF 1030</p><p>Before SCR 890</p><p>After SCR 850</p><p><br /></p><p>DEF pressure 130</p><p>DEF dosing rate 18</p><p>Nox before cat 289</p><p>Nox after cat 193</p><p>SCR efficiency 30%</p><p><br /></p><p>Any ideas?[/QUOTE]</p><p><br /></p>

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