![]() Once the system reaches 525 or better then the doser starts to inject fuel to get the really high temps. This is actually done by the turbo vanes closing, causing high exhaust back pressure and load on the engine. Once a regen is initiated the DOC inlet and DPF inlet need to reach about 525 -550 degrees. When running a regen you need to open up data monitor and watch all the exhaust temps and doser injector state. Also, is the DOC and DPF due for cleaning? It sounds like you have access to Insite. Cummins does have requirements to remove and clean the doser injectors because they do get plugged up rather easily. Weak metering actuators and warped diffuser plate in the turbo are common problems that get worse with hot engines versus warm or cold engines. I know it is easier said than done, sorry. This is where you need to reproduce the situation that is causing the fault. The reason for this is not always the same. Once the truck has sat for 8 hours and the regen retried it takes off and performs a perfect regen. I have had several regens fail with a fully hot engine and exhaust systems. You would have to try a regen with the truck freshly back from a long run and see what happens. It is quite common for us to follow the TS and perform a regen and everything is fine because we started with an engine that hasn't been running for hours and has cooled down. Most regen faults get logged after a failed regen, when the engine and everything else is right up to operating temp and has been there for hours. I see those temps all the time on successful regens. See for CARB status on each part for a specific vehicle.The temps you have listed probably will never cause a fault. Some intake systems are not legal for sale or use on any pollution controlled motor vehicle in California or states adopting California emission procedures. If you have questions about your order or discount, call 80, Monday–Friday, between 6:00 am and 4:30 pm EST. By using your one-time discount code, entrants confirm they are at least 18 years of age and release K&N of responsibility. K&N reserves the right to change, modify or terminate this offer due to unauthorized or ineligible use of the offer, tampering, system errors or unforeseen problems. Not redeemable for cash, credit or gift card and no exchange, transfer or substitution permitted unless K&Namp, in its sole discretion, determines otherwise. Requests with invalid or undeliverable addresses will be denied. Offer valid on purchase of specified product(s) at only. AIR DOC INTAKE CODECANNOT BE COMBINED WITH ANY OTHER REBATE OFFER - DISCOUNT CODE CAN ONLY BE CLAIMED ONCE AND CANNOT BE APPLIED TO PRIOR PURCHASES. This offer is an end-consumer discount, and is not available to groups, dealers, distributors, retailers or manufacturers’ representatives individual or stocking orders and rebate rights cannot be transferred. Offer available to US residents 18 & older. This offer is valid for mailing addresses in the 50 US States and DC, excluding where prohibited, restricted or taxed. The following filters are excluded from the promotion, Cabin and HVAC. Limit ONE (1) code redemption per customer, receipt, household, family or address, except in RI where the limit is 2, while supplies last. ![]()
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