Questions & Answers

Your diesel aftertreatment system is designed to reduce emissions and keep your engine running efficiently. When one of its components begins to fail, your truck or equipment will often show warning signs long before a complete breakdown occurs.
 
If you're experiencing any of the following symptoms, it's time to have your system professionally diagnosed.
 
Frequent or Failed Regenerations:
If your vehicle is regenerating more often than normal, or is unable to complete a regeneration cycle, it may indicate a restricted DPF, a failing DOC, faulty sensors, or an underlying engine issue.
 
DPF Warning Light:
A DPF warning light is one of the earliest signs that your filter is becoming restricted. Continuing to operate the vehicle without addressing the problem can lead to increased soot buildup, reduced performance, and costly repairs.
 
Check Engine Light or Emissions Fault Codes:
Emission-related fault codes can be caused by problems with the DPF, DOC, SCR, DEF system, sensors, wiring, or engine performance. Proper diagnostics are essential to identify the root cause instead of replacing parts unnecessarily.
 
Engine Derate or Reduced Power:
If your truck or equipment has entered derate mode, the engine is limiting its power to protect the emissions system. This often results from excessive soot loading, DEF system faults, or failed aftertreatment components.
 
Loss of Fuel Economy:
A restricted aftertreatment system forces your engine to work harder, leading to increased fuel consumption. If you've noticed a drop in fuel mileage, your emissions system may be part of the problem.
 
Excessive Exhaust Smoke:
Black, white, or blue exhaust smoke can indicate engine issues that are affecting your aftertreatment system. Problems such as faulty injectors, turbocharger failures, excessive oil consumption, or coolant leaks can quickly damage emission components if left unresolved.
 
DEF System Warnings:
Messages related to low DEF quality, SCR efficiency, or DEF dosing should never be ignored. These warnings can quickly progress into engine derates or no-start conditions if the underlying issue isn't corrected.
 
Strong Exhaust Odor:
An unusual exhaust smell or excessive heat from the aftertreatment system may indicate catalyst damage, regeneration issues, or exhaust leaks that require immediate attention.
 
Poor Engine Performance:
Sluggish acceleration, lack of power under load, rough operation, or excessive idling issues may all be connected to a restricted or malfunctioning aftertreatment system.
 
Don't Ignore the Warning Signs:
Many aftertreatment failures begin as minor issues that can be corrected before they lead to expensive repairs or unexpected downtime. At Renew DPF, we provide expert diagnostics, professional cleaning, ReCore services, and mobile field support for commercial trucks, heavy equipment, agricultural machinery, and fleet vehicles.
If your equipment is showing any of these warning signs, contact Renew DPF today. We'll identify the root cause, recommend the right repair, and help get you back to work as quickly as possible.