KC-2194
Service Bulletin Details
Public Details for: KC-2194
Cbr - volvo selective catalytic reduction (scr) muffler troubleshooting guide - us10+obd13 and newer emissions
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Models from 2024
2024 VOLVO VAH |
2024 VOLVO VHD |
2024 VOLVO VN |
Models from 2023
2023 VOLVO VAH |
2023 VOLVO VHD |
2023 VOLVO VN |
Models from 2022
2022 VOLVO VAH |
2022 VOLVO VHD |
2022 VOLVO VN |
Models from 2021
2021 VOLVO VAH |
2021 VOLVO VHD |
2021 VOLVO VN |
Models from 2020
2020 VOLVO VAH |
2020 VOLVO VHD |
2020 VOLVO VN |
Models from 2019
2019 VOLVO VAH |
2019 VOLVO VHD |
2019 VOLVO VN |
Models from 2018
2018 VOLVO VAH |
2018 VOLVO VHD |
2018 VOLVO VN |
Models from 2017
2017 VOLVO VAH |
2017 VOLVO VHD |
2017 VOLVO VN |
Models from 2016
2016 VOLVO VAH |
2016 VOLVO VHD |
2016 VOLVO VN |
Models from 2015
2015 VOLVO VAH |
2015 VOLVO VHD |
2015 VOLVO VN |
Models from 2014
2014 VOLVO VAH |
2014 VOLVO VHD |
2014 VOLVO VN |
Models from 2013
2013 VOLVO VAH |
2013 VOLVO VHD |
2013 VOLVO VN |
6/30/23, 12:58 PM Article Volvo Selective Catalytic Reduction (SCR) Muffler Troubleshooting Guide - US10+OBD13 And Newer Emissions Component Overview The SCR contains a coated substrate that, with the input of heat and DEF, changes NOx into nitrogen and water vapor. The SCR's job in the Emissions After-Treatment System (EATS) is to lower the NOx level emitted into the atmosphere. The performance of the SCR is evaluated by the NOx sensors. There are NOx sensors that are located on upstream (inlet) and downstream (outlet) ends of the SCR. Important: the SCR is the last component in the EATS which makes it susceptible to any upstream failures. Primary failure mode of the Muffler (SCR) is: https://volvo-trkna-prod1.pegacloud.net/prweb/PRAuth/app/VolvoKM_/iNPUIKpeinqPJi2G0hH930k43USdE1gb*/!PS1__TABTHREAD10?pyActivity=%… 1/5 6/30/23, 12:58 PM Article Coating of the substrate being compromised Indigestions of foreign objects such as oil, coolant, fuel, etc. Diagnosis and Repair Prior to proceeding with any of the information below, any codes, symptoms or failures of upstream components must be diagnosed and corrected first. Upstream components include: Base Engine (Starting or operation issues) EGR System Fuel System (Engine supply and aftertreatment hydrocarbon injector supply) Turbocharger/Boost Diesel Oxidation Catalyst (DOC) Diesel Particulate Filter (DPF) Aftertreatment sensors (Exhaust temperature) The three DTCs below indicate problems with SCR function. These DTCs should only be diagnosed if they are active or if the DTC Confirmed status is True in the Detailed status information section. Fault Code Descriptions P20EE SCR NOx Catalyst Efficiency Below Threshold (Bank 1) P103C NOx Catalyst Efficiency Inducement, Selective Catalytic Reduction (SCR) Unit P207F SCR NOx Catalyst Efficiency Below Threshold (Bank 1) Evaluations for SCR Muffler Replacement The following systems need to be evaluated in progressive order to determine the state of the SCR. 1. DEF System - Test the Urea/DEF Systems functionality for proper: Quality Check DEF Quality using Refractometer (88890105) Litmus Test paper (88890110) https://volvo-trkna-prod1.pegacloud.net/prweb/PRAuth/app/VolvoKM_/iNPUIKpeinqPJi2G0hH930k43USdE1gb*/!PS1__TABTHREAD10?pyActivity=%… 2/5 6/30/23, 12:58 PM Article Quantity SCR Dosing Test in PTT, Operation 2589-08-03-05 subsection 1-3. With the dosing nozzle removed, inspect for crystal build up. If any of the above tests fail: Correct the issue, clear fault codes, and release the truck. 2. NOx Sensor Condition - Evaluate the condition of both NOx Sensors. Look for the following: Non-OEM (3rd party) sensors, use CBR-2114 for guidance. Any/All NOx sensor fault codes. See CBR-2116 for a list of these faults and recommendations. If Non-OEM or faulty Nox Sensor(s) is found: Replace the sensor(s), clear faults and release the truck. 3. NOx Sensor Function and SCR Assessment- Evaluate NOx sensor function using the appropriate test for the vehicle's emission level, indicated below. Follow the directions in the Action column for Nox or SCR Replacements. Emission Level PTT Operation Action OBD 13-16 2549-08-03-03 Nox Conversion Test Follow test recommendation, if no fault found replace the SCR in accordance with Impact procedures. OBD 17 to current 2589-08-03-18 Exhaust Aftertreatment System Analysts Follow test recommendation and release truck. or 2549-08-03-03 NOx conversion test below EATS annalysis OBD 17-18 TC Only No test… Replace Both Nox Sensors if not replaced within past 3 months and release truck. If truck has received both Nox sensors within https://volvo-trkna-prod1.pegacloud.net/prweb/PRAuth/app/VolvoKM_/iNPUIKpeinqPJi2G0hH930k43USdE1gb*/!PS1__TABTHREAD10?pyActivity=%… 3/5 6/30/23, 12:58 PM Article past 3 months replace the SCR in accordance to impact procedures. Rules for Replacement Standard Diagnostic time is 3 hours. Note that Warranty will only cover replacement of the SCR if one of the three codes in the section above is present. If the SCR is suspected to have failed due to upstream contamination with no codes present, an eService case is required for further evaluation. Tags p103c00 p207f00 volvo scr p20ee00 unlocking uptime Categories Make and Model > Volvo > VNL Make and Model > Volvo > VNR Make and Model > Volvo > VNM Make and Model > Volvo > VNX Make and Model > Volvo > VAH Make and Model > Volvo > VHD Vehicle System > Emissions Related links and attachments Feedback No links or attachments available https://volvo-trkna-prod1.pegacloud.net/prweb/PRAuth/app/VolvoKM_/iNPUIKpeinqPJi2G0hH930k43USdE1gb*/!PS1__TABTHREAD10?pyActivity=%… 4/5 6/30/23, 12:58 PM Article Give feedback to help improve the content of this article https://volvo-trkna-prod1.pegacloud.net/prweb/PRAuth/app/VolvoKM_/iNPUIKpeinqPJi2G0hH930k43USdE1gb*/!PS1__TABTHREAD10?pyActivity=%… 5/5