2021 Isuzu F-Series

Service bulletins

Technical service bulletins and other communications the manufacturer sent dealers about this vehicle. Ask a dealer for the full document by its number.

• 11011555This information bulletin outlines the service procedures for diagnosis and parts information for repair of the mobileye 6 system. Figure 1 below IS an example of the camera used on a mobileye 6 system. The procedure discussed in this bulletin must be used for repairing any mobileye 6 system.
• 10249692INFORMATION BULLETIN: Allison recently announced a new transmission fluid: TES 668. While Allison asserts this fluid is interchangeable with TES 295 for its transmissions, it is NOT interchangeable for all Isuzu vehicles. It is important to note that 2018 to 2023 Isuzu F-Series vehicles must USE ONLY the original TES 295 fluid. See Table 1 below for the correct application of TES 295 and TES 668 transmission fluids. Refer to the applicable Workshop Manual for additional information.
• 10246229The information provided to help technicians better understand common customer questions or vehicle operations that may be incorrectly perceived as a problem. Additionally, diagnostic scan tool connection requirements are outlined for easier technician diagnosis.
• 10246227This bulletin provides information with regards to the isuzu commercial vehicle (cv) service policies and procedures manual (sppm). The isuzu cv sppm (sections 2.15 and 2.16) provides detailed procedures related to vehicle storage up to and beyond 30 days. Performing these required procedures at the specified intervals will properly maintain vehicles until they are retailed. Failure to follow the procedures outlined may result in repairs and additional costs that could have been avoided. We are providing dealers with this brief overview of the recommended procedures as a reminder to maintain older inventory. Failures resulting from improper, or lack of, storage procedures are not covered under the vehicle factory warranty.
• 10246226In some 2021my isuzu f-series vehicles, operators may experience an illuminated check engine malfunction indicator lamp (mil) with diagnostic trouble code (dtc) p2201 nox sensor circuit performance sensor 1 and/or dtc p20ee diesel exhaust fluid (def) system nox trap low efficiency set in the def control unit (dcu). We have determined a dcu calibration error IS causing this dtc to set. Therefore, this dtc may be resolved by reprogramming the dcu with a revised calibration.
• 10244945The following information is provided to clearly explain Isuzus policy for control module (engine, transmission, antilock brake, instrument panel, body control, power interface, etc.) reprogramming. Control module calibrations are regularly updated for many reasons. These reasons may include, but are not limited to: model year change, software corrections, certification compliance, product improvement and specific application requirements. However, the mere existence of a newer control module calibration does not necessarily mean that warranty coverage exists or that the calibration must be installed. It is not our policy to update control modules, under warranty or after warranty, based solely on the availability of a newer calibration file. Below are our guidelines for reprogramming control modules.
• 10244943SPECIAL POLICY ADJUSTMENT: In some 2018-2021MY Isuzu F-series vehicles equipped with 5.2L (4HK1) diesel engines, the diesel particulate filter (DPF) fuel injector may fail, setting Diagnostic Trouble Code (DTC) P0420 in the Engine Control Module (ECM). If this occurs, the Check Engine Malfunction Indicator Lamp (MIL) will illuminate. This Special Policy covers the condition described above for a period of ten (10) years from the date the vehicle was originally placed in service, regardless of ownership, or 150,000 miles (241,000km), whichever occurs first. Diagnosis and repair of conditions other than the condition described above are not covered under this Special Policy.
• 10244941This bulletin provides information with regards to the Isuzu Commercial Vehicle (CV) Service Policies and Procedures Manual (SPPM). The Isuzu CV SPPM (sections 2.15 and 2.16) provides detailed procedures related to vehicle storage up to and beyond 30 days. Performing these required procedures at the specified intervals will properly maintain vehicles until they are retailed. Failure to follow the procedures outlined may result in repairs and additional costs that could have been avoided. We are providing dealers with this brief overview of the recommended procedures as a reminder to maintain older inventory. Failures resulting from improper, or lack of, storage procedures are not covered under the vehicle factory warranty.
• 10244939Isuzu Commercial Truck of America, Inc. is distributing this procedure for adding keyless entry transmitters as a quick reference to help dealers better service the customer. Also included is the clearing procedure for customers who have had transmitters lost or stolen. This procedure may be used to clear all transmitters from the Keyless Entry Control Unit.
• 10241814Supercedes SB23-L-001: The vehicles Check Engine Malfunction Indicator Lamp (MIL) may illuminate with DTC P2201 and/or P20EE set in the DEF Control Unit (DCU). If one or both of the preceding DTCs are present, first follow the diagnostic for the DTC(s) in question. If no mechanical fault can be found during normal diagnosis, follow the service procedure in this bulletin to correct the concern.
• 10240367Isuzu is providing this bulletin to outline Isuzu's policy and procedures for Isuzu vehicles with Tire Warranty Coverage. NOTE: After the Isuzu Tire Warranty expires, additional coverage may be available from the tire manufacturer. Refer to the tire manufacturer's warranty booklet that was provided with the vehicle at the time of the sale.
• 10238688The vehicle's Check Engine Malfunction Indicator Lamp (MIL) may illuminate with DTC P2201 set in the DEF Control Unit (DCU). If the preceding DTC is present, first follow the diagnostic for the DTC in question. If no mechanical fault can be found during normal diagnosis, follow the service procedure in this bulletin to correct the concern.
• 10238685IDA is a diagnostic program that provides: 1. DTC Analysis 2. DPF Early Regeneration Warning Detailed instructions on how to use the IDA are included in this bulletin.
• 10237146This bulletin outlines the procedures for using the Alpine Exchange Program (the "Exchange Program"). The Exchange Program must be used when any Alpine radio or other component covered by this bulletin is repaired under warranty and may also be used for radio and component repairs not covered under warranty. Contact Alpine directly for pricing and payment methods applicable to radio and component repairs not covered under warranty.
• 10233458What is IDA? IDA is a diagnostic program that provides: 1) DTC Analysis: IDA analyzed DTCs (currently 35) and then provides quick and easy-to-understand repair solutions 2) DPF Early Regeneration Warning: IDA also reviews the three latest DPF regeneration odometer readings in the Health Report of the applicable VIN on IDA. IDA then analyzes the distances between the three regenerations. If the average of these distances is less than 55 km for a 4HK1 (5.2L) engine, or less than 70 km for a 4JJ1 (3.0L) engine, an alert will be shown on the IDA page in the form of a red regeneration icon. This is an early warning indication that a problem may be forming in the DPF regeneration cycle. However, if the enabling criteria shown above are not met, a regeneration icon will not appear on the IDA for that particular VIN. Detailed instructions on how to use IDA are included in this bulletin.
• 10225521We have received reports of the front turn signal lenses cracking on Isuzu vehicles. These lenses are cracking from the effects of being washed with alkaline detergents. Alkaline detergents are typically used in industrial settings and are reactive with the paint, metals, and other materials used to make up the exterior components of Isuzu vehicles. Isuzu recommends that only neutral detergents be used when washing Isuzu vehicles. However, if alkaline detergents are used to wash an Isuzu vehicle, it is crucial that all traces of the detergent are rinsed away with water or wiped off as necessary. Allowing alkaline detergent to dry on the turn signal lenses will cause them to crack. Each Isuzu vehicle is originally equipped with an Owner's Manual that includes guidelines for the proper exterior maintenance of the vehicle. The following guidelines are typical of those found in an Isuzu Owner's Manual concerning the use of detergents on a vehicle's exterior.
• 10218932Isuzu Commercial Truck of America, Inc. (ICTA) is providing the following procedural recommendations to improve dealer efficiency when submitting Parts Warranty claims. We strongly recommend dealers follow these procedures in order to avoid delays in Parts Warranty claim payments and/or claim chargeback. This bulletin was revised to add a Parts Warranty Form
• 10218927Isuzu Commercial Truck of America, Inc. (ICTA) is providing the following procedural recommendations to improve dealer efficiency when submitting Parts Warranty claims. We strongly recommend dealers follow these procedures in order to avoid delays in Parts Warranty claim payments and/or claim chargeback.
• 10217004The Isuzu Commercial Truck of America (ICTA) Service Technical Assistance Center (TAC) provides diagnostic support to Isuzu dealer technicians repairing Isuzu vehicles in and out of vehicle warranty. A TAC case number will be issued solely for information tracking purposes and future contact reference.
• 10217001The following is a list of the Isuzu-recommended Threebond product part numbers identified in the various Isuzu Workshop Manuals and bulletins. If a Threebond product is unavailable, we recommend that you utilize the chart below to find equivalent of similar products (when available) from Loctite and Permatex.
• 10208791Isuzu Motors Limited has decided that a defect, which relates to motor vehicle safety, exists in 2019, 2019, 2020 and 2021 model year F-Series vehicles. The jam nut for the steering stopper bolt on the left side may loosen and allow the bolt to back away from the steering knuckle. This could result in an increase in the turning radius of the vehicle in left urns, which could make it difficult to make sharp turns. If the vehicle's turning radius is increased, there is an increased risk of a crash. A prior recall (19V-467) was conducted to address this issue, but we have identified this condition on vehicles that were remedied in that campaign as well as those that were produced after a change in production intended to prevent the condition.
• 10207902Customer Satisfaction Campaign: Reprogram Diesel Exhaust Fluid Control Unit (DCU); vehicle may light MIL for DTC P225C in error due to DCU calibration. Reflashing of DCU with updated calibration will resolve this issue.
• 10206061Isuzu Commercial Truck of America, Inc. is proud to introduce the redesigned Isuzu Vehicle Health Report (VHR) program. Beginning October 2021, Isuzu dealers are able to access, through www.isuzutruckservice.com, all of the Isuzu Vehicle Health Report Data (MMU Data) associated with 2011MY and newer vehicles serviced by their dealership in a new, user friendly VHR. Look for the VHR tab after you log in. n contrast to the previous design, the new VHR exists in a central database easily accessed by dealership personnel at any time from any PC with internet access. Users will be able to quickly select vehicles by entering a VIN (partial or all 17 digits) or select from a list of the VINs most recently downloaded by their dealership to create a VHR.
• 10204471Turbocharger inspection.
• 10203309DTC P225C CALIBRATION UPDATE ? REPROGRAM DEF CONTROL UNIT (DCU). Follow the diagnostic for this DTC. If no mechanical fault can be found during normal diagnosis, follow the service procedure in this bulletin to correct the concern.
• 10203308This bulletin supersedes information bulletin IB18-X-001C. The purpose of this bulletin is to update affected model years. Please discard previous bulletin IB18-x-001c. ISUZU DTC ANALYZER (IDA) ? PILOT PROGRAM INTRODUCTION
• 10201566In an effort for continuous improvement, Isuzu has a need to obtain Mimamori ECU
• 10190781The check trans light may illuminate in the affected vehicles without any apparent transmission concerns. The transition control module (tcm) IS programmed by allison to predict the need for transmission maintenance relating to the oil life monitor, filter life monitor, and transmission health monitor. In order to protect the transmission assembly, the check trans light will illuminate when service intervals exceed allison's recommendations. Note: the most common diagnostic trouble code associated with the illumination of the check trans light IS dtc p088b-transmission filter deterioration. If the check trans light IS going on without any apparent transmission concerns, please refer the customer to their closest allison authorized repair location, please go to (or recommend the customer go to) www.allisontransmission.com/sales-service-locator this condition IS maintenance-related as recommended in the allison transmissions operator's manual and IS not covered under isuzu's new vehicle warranty.
• 10186932An egr cooler tester was provided to dealers in june 2009 to diagnose egr cooler leaks on all isuzu diesel engines equipped with an egr cooler. This tester consists of a pressure regulator assembly j-46091-1 and adapters en-48974-5, en-48974-15, and en-48974-30. Important: leaks from the egr cooler may allow coolant ot pass through the exhaust system and enter the combustion chambers. Failure to inspect the egr cooler for leaks may lead to a misdiagnosis for engine coolant in the combustion chamber. Important: leaks from the egr cooler may allow exhaust gas air to pass to the engine coolant passage within the egr cooler. Failure to inspect hte egr cooler for leaks may lead to a misdiagnosis of air in the engine cooling system
• 10186931Some customers may complain about wind noise and/or water intrusion into the cab from the driver and/or passenger doors of the affected n-series and ftr trucks. To correct this condition isuzu commercial truck of america, inc. (Itca) IS offering a new door weather strip to improve sealing of the driver and passenter doors.

Every Isuzu F-Series model year

Bars are owner complaints, dots mark years with recalls. Select a year to open its report.