TSB V-257-001 082026
Service Bulletin/Repair Instructions
TSB - Engine, crankcase ventilation, oil leakage.
Vehicle report
2026 VOLVO VNL (4)
Service bulletins
127 bulletinsTechnical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
TSB V-861-001 082026
Service Bulletin/Repair Instructions
TSB - Under Hood Contamination Prevention.
CBR 2599-1 082026
Service Bulletin/Repair Instructions
CBR - Aggressive Trailer Braking Troubleshooting Guide.
CBR 2598-2 082026
Service Bulletin/Repair Instructions
CBR - Injector Widget to Assist in Proper Diagnostic / Injector Repair caused by offset learning max and misfire.
CBR 2429-5 082026
Service Bulletin/Repair Instructions
CBR - Flexible Switch Panel Replacement and Calibration Procedures.
CBR 2596-1 082026
Service Bulletin/Repair Instructions
CBR - ECM Failure - No Crank/Engine Start Condition.
TSB V-590-001 072026
Service Bulletin/Repair Instructions
TSB - Wheel Speed Sensor Fitting and Cable Clamping.
CBR 2585-3 072026
Service Bulletin/Repair Instructions
CBR - The purpose of this CBR is to provide support for fault codes C106718 and/or C106818.
CBR 2545-3 072026
Service Bulletin/Repair Instructions
CBR - The purpose of this CBR is to provide guidance on fault code U114688.
TSB V-371-005 072026
Service Bulletin/Repair Instructions
TSB - Jumper Harness Repair.
CBR-2592-1 202606
Service Bulletin/Repair Instructions
The purpose of this CBR is to provide steps on how to correct a customer complaint of DTC P107B86 accompanied With intermittent loss of throttle.
CBR-2590-2 202606
Service Bulletin/Repair Instructions
The purpose of this CBR is to provide steps on how to correct a customer complaint of instrument cluster going dark (blackout) situation.
CBR-2591-1 202606
Service Bulletin/Repair Instructions
The purpose of this CBR it to provide release notes for the recent Engine ECU software.
CBR-2494-19 202606
Service Bulletin/Repair Instructions
The VN(4)'s electrical architecture relies on multiple ECUs, each handling specific functions. To ensure seamless operation and peak system performance, it is essential that all ECUs run the same software version (Software Baseline). This is accomplished by installing a complete software baseline, which is delivered via service pack.
CBR-2568-5 202606
Service Bulletin/Repair Instructions
Contact Workshop; Communication Lost With Ultracapacitor Message With Associated CCIOM DTC U100687 And A Startability Issue.
CBR-2587-2 202606
Service Bulletin/Repair Instructions
The purpose of this cbr is to provide steps on how to protect the alternator power cable connection from corrosion.
CBR-2586-1 202606
Service Bulletin/Repair Instructions
The purpose of this CBR is to address issues of exhaust stack rotation on version 4 products.
CBR-2465-7 202606
Service Bulletin/Repair Instructions
The purpose of this CBR is to help diagnosis issues with the Proactive Engine Restart system and Hood Open popup message.
CBR-2588-2 202606
Service Bulletin/Repair Instructions
The purpose of this CBR is to provide aid in VMCU fault B1524-49 along with a Rain sensor which will not calibrate.
CBR -2465 202605
Service Bulletin/Repair Instructions
The purpose of this CBR is to help diagnosis issues with the Proactive Engine Restart system and Hood Open popup message.
RD26-2 202605
Over The Air
If you have received this document, it is because one or more of the following Faults has been active for at least 5 minutes and can potentially prevent the Supplemental Restraint System/Airbag Inflation System (SRS) from functioning properly in the event of a collision. Tech Tool will need to be used for more detailed diagnostics.
CBR- 2587 202605
Service Bulletin/Repair Instructions
The purpose of this cbr is to provide steps on how to protect the alternator power cable connection from corrosion.
CBR-2494 202605
Service Bulletin/Repair Instructions
The purpose of this CBR is address when you should update to 6.0 service pack.
CBR-2583 202605
Service Bulletin/Repair Instructions
The purpose of this CBR is to assist in diagnosing Tire Pressure Monitoring System (TPMS) DTCs U101A /U101B as well as instructions to replace the TPMS Range Extends and Wireless Sensor Gateway if it is determined it is required.
CBR -2585 202605
Service Bulletin/Repair Instructions
The purpose of this CBR is to provide support for fault codes C106718 and/or C106818.
CBR-2584-202605
Service Bulletin/Repair Instructions
When calibrating ECS, the PTT instructions may be lacking needed information.
CBR-2435 202605
Service Bulletin/Repair Instructions
This CBR solution provides guidelines for ensuring the correct position of battery sensor modules and battery sensor harnesses on the Volvo VN(4) chassis, as well as the Battery Sensor Diagnostic, Calibration, and Configuration Procedure.
CBR-2456 202605
Service Bulletin/Repair Instructions
This CBR solution provides guidance on updating the infotainment system when customer is missing applications and/or having issues with navigation or Apple/Android CarPlay.
CBR 2441-8 202604
Service Bulletin/Repair Instructions
CBR - Key Fob Calibration and/or Replacement.
CBR 2568-3 202604
Service Bulletin/Repair Instructions
CBR - Communication Lost With Ultracapacitor Message With Associated CCIOM DTC U100687 and a Startability Issue.
RD26-1 202604
Over The Air
RD - Over the Air Transmission Oil Level Sensor.
CBR 2574 202604
Service Bulletin/Repair Instructions
CBR - Manual TPMS wheel sensor calibration.
CBR 2562-15 202604
Service Bulletin/Repair Instructions
CBR - Electric Pneumatic Module (EPM) Fault Code C10C256
CBR 2569-3 202604
Service Bulletin/Repair Instructions
CBR - Brake Pad Wear Indicator DTC C107E68.
CBR 2540-7 202604
Service Bulletin/Repair Instructions
CBR - Upper Bunk Restraint System – Plastic Gable Retention Field Fix
SC S4864 202604
Service Campaign
SC - Alternator Tensioner Belt
SC S4922 202604
Service Campaign
SC - Steering Shaft Replacement.
TSB V-561-002 202604
Service Bulletin/Repair Instructions
TSB - Compressor Discharge Line Routing.
CBR 2570-1 032026
Service Bulletin/Repair Instructions
CBR - EBS - Electro-Pneumatic Module - Signal Compare Failure DTC C109562 - VN (4).
CBR 2172-7 032026
Service Bulletin/Repair Instructions
CBR - No Start Condition After Over the Air Programing - VECU5 No Start "Safe State"
CBR 2564-1 032026
Service Bulletin/Repair Instructions
CBR - Check Radar Pop-up Message - VN (4).
TSB V-375-001 032026
Service Bulletin/Repair Instructions
TSB - Reversing Camera Harness, Repair.
CBR 2565-1 032026
Service Bulletin/Repair Instructions
CBR - Trailer, 12Volt Right/Left Direction Indicator Circuit Warning VN (4).
CBR 2246-5 032026
Service Bulletin/Repair Instructions
CBR - Z Spring Bracket Wear. Volvo Chassis
CBR 2514 022026
Service Bulletin/Repair Instructions
CBR - This procedure provides a temporary corrective action for the “Lost Communication to Alternator” message and Vehicle Master Control Unit (VMCU) DTC C103508 caused by a software issue.
CBR 2522-5 202601
Service Bulletin/Repair Instructions
CBR - Frequent Parked Regeneration Requests - VN (4).
CBR 2443-4 202601
Service Bulletin/Repair Instructions
CBR - Trailer Tandem Adjustment Procedure - VN (4).
CBR 2494-11 202601
Service Bulletin/Repair Instructions
CBR - The purpose of this CBR is outline the interim software solution for VN4. Note that this document is subject to updates and currently covers Service Pack updates to B1_T2_5.1.
CBR 2548-1 202601
Service Bulletin/Repair Instructions
CBR - Shock Interference With “Z” Springs.
CBR 2540-5 202601
Service Bulletin/Repair Instructions
CBR - Upper Bunk Restraint System – Plastic Gable Retention Field Fix.
CBR 2408-16 202601
Service Bulletin/Repair Instructions
CBR - Air Production Modulator (APM) DTC C10129B - High/Excessive Flow - VN (4).
CBR 2435-16 202601
Service Bulletin/Repair Instructions
CBR - Volvo Chassis - Battery Sensor Diagnostic and Calibration Procedure - VN (4).
CBR 2545-1 202601
Service Bulletin/Repair Instructions
CBR - U114688 VMCU Communication Fault - VN (4).
CBR 2516-6 202601
Service Bulletin/Repair Instructions
CBR - CMS Black Screen Troubleshooting - VN(4).
FI S4703 202601
Service Campaign
FI - Elemental Chassis Fairing Replacement.
SC S4642 202601
Service Campaign
SC - Front Engine Accessory Drive Update.
SC S4743 202601
Service Campaign
SC - MCO/VECI Label Reprint.
CBR 2540-1 202512
Service Bulletin/Repair Instructions
CBR - Upper Bunk Restraint System – Plastic Gable Retention Field Fix.
CBR 2542-2 202512
Service Bulletin/Repair Instructions
CBR - Interim Immobilizer Parameter Configuration.
CBR 2526-5 202512
Service Bulletin/Repair Instructions
CBR - Parking Heater Inoperative.
CBR 2535-1 202512
Service Bulletin/Repair Instructions
CBR - Regeneration Not Possible
S4674 202512
Service Campaign
SC - Cab Leveling Bar Loose
CBR 2532-1 202511
Service Bulletin/Repair Instructions
CBR - Automatic High Beam - VN (4).
S4591 202511
Service Campaign
CBR - VN(4) Parking Heater Plumbing.
CBR 2494-7 202511
Service Bulletin/Repair Instructions
CBR - The purpose of this CBR is outline the interim software solution for VN4.
CBR 2016-18 202511
Service Bulletin/Repair Instructions
CBR - Frame or Cab Lean
CBR 2526-4 202511
Service Bulletin/Repair Instructions
CBR - Parking Heater Inoperative - VN (4).
CBR 2514--2 202511
Service Bulletin/Repair Instructions
CBR - Lost Communication to Alternator Message - DTC C103508.
CBR 2518-2 202511
Service Bulletin/Repair Instructions
CBR - Load Lock Clamp Breaking - VN (4).
CBR 2525-2 202511
Service Bulletin/Repair Instructions
CBR - Exhaust Leak or Noise – Turbo Compound (TC) Bolt Inspection and Repair - VN (4).
CBR 2527-1 202511
Service Bulletin/Repair Instructions
CBR - Center Chassis Input Output Module(CCIOM) Fault Code U3000-94 - VN (4).
CBR 2408-15 202511
Service Bulletin/Repair Instructions
CBR - Air Production Modulator (APM) DTCC10129B - High/Excessive Flow - VN (4).
CBR 2467-5 202511
Service Bulletin/Repair Instructions
CBR - Service Required Message - VN (4).
CBR 2521-1 202511
Service Bulletin/Repair Instructions
CBR - Xantrex Inverter Sub-hardware Mismatch.
CBR 2520-2 102025
Service Bulletin/Repair Instructions
CBR - Exhaust Temperature Sensor Rationality Faults and MIL Illumination.
CBR 2516-3 102025
Service Bulletin/Repair Instructions
CBR - CMS Black Screen Troubleshooting.
CBR 2480-7 102025
Service Bulletin/Repair Instructions
CBR - Resolution Process for Locked Control Unit(s).
CBR 2514-1 102025
Service Bulletin/Repair Instructions
CBR - Lost Communication to Alternator Message.
CBR 2512-1 102025
Service Bulletin/Repair Instructions
CBR - Air-Valve Cover Popping Off Seat
CBR 2511-1 102025
Service Bulletin/Repair Instructions
CBR - Inverter Low/No Power Shutoff Bypass.
CBR 2492 092025
Service Bulletin/Repair Instructions
To address customer concerns regarding the unprotected ON/OFF button of the Xantrex power inverter located in the luggage compartment. The button should be safeguarded to prevent accidental activation, which can result in unintended battery drain.
CBR 2504 092025
Service Bulletin/Repair Instructions
Some vehicles may have reverse cameras not properly assigned from the factory.
CBR 2503 092025
Service Bulletin/Repair Instructions
The purpose of this CBR is to outline the steps for adjusting brake pedal free play following Foot Brake Modulator (FBM) replacement or when diagnostic code C10C3-77is present.
CBR 2500 092025
Service Bulletin/Repair Instructions
This procedure describes the standardized method for repairing failed inserts pulled out of a table surface. It applies only when the receiving hole is not significantly damaged. Acceptable conditions include surface fraying or peeling at the painted layer only, withno full-depth cracking.
CBR 2494 092025
Service Bulletin/Repair Instructions
The purpose of this CBR is outline the interim software solution for VN4. Note that this document is subject to updates and currently covers Service Pack updates to B1_T2_4.2.
CBR 2497 092025
Service Bulletin/Repair Instructions
Electronic control units on the VN(4), PR (4) and AN (4) contain information that is critical for vehicle functionality, maintaining vehicle life data, and maintaining vehicle compliance. Because of this, swapping ECUs from truck to truck even for diagnostic purposes may cause functional or compliance complications that may or may not be apparent.
CBR 2408 092025
Service Bulletin/Repair Instructions
This document provides guidance for addressing the APM DTC C10129B fault," High/Excessive Flow" This fault was introduced by a previous APM software package and requires specific containment actions.
CBR 2482 092025
Service Bulletin/Repair Instructions
Purpose of this CBR is to address Pop up message for PTO Malfunction when there is no PTO Installed.
CBR 2465 092025
Service Bulletin/Repair Instructions
This CBR pertains to two issues that may arise with the Proactive Engine Restart (Remote Engine Start System).
CBR 2172-5 082025
Service Bulletin/Repair Instructions
CBR - When an OTA (Over-The-Air) job starts to program the VECU blocks the starter relay out, if the job ends in a Critical failure, the vehicle will remain in Safe State.
CBR 2493-1 082025
Service Bulletin/Repair Instructions
CBR - Certain VN (4) vehicles may be equipped with an Engine Fan Override switch in the dashboard that is not operational. .
CBR 2487-082025
Service Bulletin/Repair Instructions
CBR - Purpose of this CBR is to address the issue with hoods cracking at the headlight.
CBR 2484-4 082025
Service Bulletin/Repair Instructions
CBR - The Purpose of this CBR is to assist with diagnostics for fault code U300049 on the Battery Power Management Unit (BPMU).
CBR 2489-1 082025
Service Bulletin/Repair Instructions
CBR - The purpose of this CBR is to address reports of water pooling on top of engine tunnel and/or the floor board of the cab.
CBR 2486-1 072025
Service Bulletin/Repair Instructions
CBR - The purpose of this CBR is to address issues where Contact Workshop : Trailer Light Malfunction" message displayed in instrument cluster.
CBR 2488 072025
Service Bulletin/Repair Instructions
CBR - A significant GPS reporting issue is affecting fleet operations, with trucks maintaining back-office communication but failing to transmit GPS location data.
CBR 2484 072025
Service Bulletin/Repair Instructions
CBR - The Purpose of this CBR is to assist with diagnostics for fault code U300049 on the Battery Power Management Unit (BPMU).
CBR 939 072025
Service Bulletin/Repair Instructions
CBR - US17AbstractVolvo Chassis equipped with Volvo Active Driver Assist may display DTC / Fault code SPN 516103 FMI 19 on Premium Tech Tool ( PTT ) or J-Pro, and code 167 in Bendix ACOM software.
CBR 2435-12 072025
Service Bulletin/Repair Instructions
CBR - This CBR solution provides guidelines for ensuring the correct position of battery sensor modules and battery sensor harnesses on the Volvo VN(4) chassis, as well as the Battery Sensor Diagnostic and Calibration Procedure.
CBR 2330 072025
Service Bulletin/Repair Instructions
CBR - Mechanical components with moving parts designed for high-temperature environments – such as the turbo wastegate used on the 13L TC engines – are susceptible to certain kinds of leakages due to their design requirements.
CBR 2396 072025
Service Bulletin/Repair Instructions
CBR - For newly delivered vehicles it may be found that the key fob will not unlock the door. The message "Pre-delivery Mode" maybe displayed on the instrument cluster.
CBR 2408 072025
Service Bulletin/Repair Instructions
CBR - This document provides guidance for addressing the Air ProductionModulator (APM) DTC C10129B fault, "High/Excessive Flow" This fault was introduced by a previous APM software package and requires specific containment actions.
CBR 2425 072025
Service Bulletin/Repair Instructions
CBR - This CBR solution outlines the analysis of temperature changes in sensors T1, T2, and T3 and provides a procedure for inspecting and addressing potential sensor issues related to AHI fuel injection.
CBR 2431 072025
Service Bulletin/Repair Instructions
CBR - This CBR solution addresses crank no start and engine dying issues in some VN (4) and PR (4) models caused by an incorrect fuel line configuration and/or fuel line fitting not seated correctly.
CBR 2443 072025
Service Bulletin/Repair Instructions
CBR - The truck’s trailer detection system uses a brief pulse of compressed air through the red trailer supply line to detect a connected trailer, but this pulse can inadvertently re-lock air-actuated tandem slide systems; this procedure outlines a method to mitigate the issue while sliding the trailer tandems.
CBR 2447 072025
Service Bulletin/Repair Instructions
CBR - Electronically Controlled Suspension (ECS) calibration using Premium Tech Tool (PTT) is required to correct discrepancies between the cluster load indicator and actual scale values, ensuring proper functionality of liftable axles and preventing unintended axle behavior.
CBR 2465-2 072025
Service Bulletin/Repair Instructions
CBR - This CBR pertains to two issues that may arise with the Proactive Engine Restart (Remote Engine Start System).
CBR 2467-4 072025
Service Bulletin/Repair Instructions
CBR - This CBR solution was created toprovide guidance on resolving the “Service Required” message that may appear in the Instrument Cluster (IC) of VN (4) and PR (4) model vehicles under specific conditions.
CBR 2482 072025
Service Bulletin/Repair Instructions
CBR - Purpose of this CBR is to address Pop up message for PTO Malfunction when there is not PTO Installed.
CBR 2480 072025
Service Bulletin/Repair Instructions
CBR - The presence of locked electronic control units may prevent programming and diagnosis. This CBR solution provides a structured workflow to resolve such conditions, reduce downtime, and minimize unnecessary eService cases.
CBR 2431-5 202506
Service Bulletin/Repair Instructions
CBR - This CBR solution addresses crank no start and engine dying issues in some VN (4)models caused by an incorrect fuel line configuration and/or fuel line fitting not seated correctly.
CBR 2435-10 202506
Service Bulletin/Repair Instructions
CBR - This CBR solution provides guidelines for ensuring the correct position of battery sensor modules and battery sensor harnesses on the Volvo VN(4) chassis, as well as the Battery Sensor Diagnostic and Calibration Procedure.
CBR 2477-1 202506
Service Bulletin/Repair Instructions
CBR - The purpose of this CBR is outline the interim software solution for VN4.
CBR 2472-2 202505
Service Bulletin/Repair Instructions
The purpose of this CBR is to provide instructions when trying to retrieve DTC and a Communication Failed Popup occurs.
CBR 2467-2 202505
Service Bulletin/Repair Instructions
This CBR solution was created to provide guidance on resolving the “Service Required” message that may appear in the Instrument Cluster (IC) of VN (4) model vehicles under specific conditions.
CBR 2468-2 202505
Service Bulletin/Repair Instructions
The purpose of this CBR is to help diagnosis an electrically faulty door latch.
CBR 2456-4 202505
Service Bulletin/Repair Instructions
This CBR solution provides guidance on updating the infotainment system when customer is missing applications and/or having issues with navigation or Apple/Android CarPlay.
CBR 2408-8 202505
Service Bulletin/Repair Instructions
This document provides guidance for addressing the APM DTC C10129B fault, "High/Excessive Flow" This fault was introduced by a previous APM software package and requires specific containment actions.
CBR 2016-14 202505
Service Bulletin/Repair Instructions
Volvo Chassis - Frame Or Cab Lean
CBR 2435-6 202505
Service Bulletin/Repair Instructions
This CBR solution provides guidelines for ensuring the correct position of battery sensor modules and battery sensor harnesses on the Volvo VN(4) chassis, as well as the Battery Sensor Diagnostic and Calibration Procedure.
CBR 2408-7 202504
Service Bulletin/Repair Instructions
CBR - This document provides guidance for addressing the APM DTC C10129B fault, "High/Excessive Flow" This fault was introduced by a previous APM software package and requires specific containment actions.
CBR 2463-3 202504
Service Bulletin/Repair Instructions
CBR - Determining source(s) of suspect abnormal turbocharger noise.
CBR 2465-1 202504
Service Bulletin/Repair Instructions
CBR - Key Fob activation issue.
CBR 2431-4 202504
Service Bulletin/Repair Instructions
CBR - This CBR solution addresses crank no start and engine dying issues in some VN (4)models caused by an incorrect fuel line configuration and/or fuel line fitting not seated correctly.
CBR 2435-5 202504
Service Bulletin/Repair Instructions
CBR - This CBR solution provides guidelines for ensuring the correct position of battery sensor modules and battery sensor harnesses on the Volvo VN(4) chassis, as well as the Battery Sensor Diagnostic and Calibration Procedure.
CBR 2456-3 202504
Service Bulletin/Repair Instructions
CBR - Infotainment system update.
S4460 202504
Service Campaign
SC - Volvo Truck has identified that certain VN4 model trucks have a miscalculation in the inter-axle driveshaft length.
Reading this report
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.