A21-021
Service Bulletin Details
Public Details for: A21-021
Service bulletin - the mil comes on with dtc U0155 (lost communication with gauge control module).
- 2021 -
Service Bulletin 21-021 July 29, 2021 Version 3 MIL Comes On with DTC U0155 Supersedes 21-021, dated June 24, 2021, to revise the information highlighted in yellow. AFFECTED VEHICLES Year Model Trim Level VIN Range 2021 Accord ALL 1HGCV1…MA000001 thru 1HGCV1…MA052042 1HGCV2…MA000001 thru 1HGCV2…MA015972 2021 Accord Hybrid ALL 1HGCV3…MA000001 thru 1HGCV3…MA018131 2021 HR-V EX, EX-L 3CZRU5…MM700001 thru 3CZRU5…MM729140 3CZRU6…MM700001 thru 3CZRU6…MM744103 2022 Odyssey ALL 5FNRL6…NB000001 thru 5FNRL6…NB008406 REVISION SUMMARY Under AFFECTED VEHICLES, VIN range was revised. Under POSSIBLE CAUSE, new information was added. SYMPTOM The MIL comes on with DTC U0155 (Lost Communication with Gauge Control Module). POSSIBLE CAUSE During certain conditions after conducting an evaporative emission leak check, a mismatch in control module shutdown commands results in the DTC being set. Also, if you rapidly press the ENGINE START/STOP button during engine cranking, that may result in the DTC being set. CORRECTIVE ACTION Update the PGM-FI software. WARRANTY CLAIM INFORMATION The normal warranty applies. Operation Number Description Flat Rate Time Defect Code Symptom Code Template ID Failed Part Number 1255D8 Update the PGM-FI software. 0.2 hr 03214 03217 A21021A 37805-6A0-A93 Skill Level: Repair Technician CUSTOMER INFORMATION: The information in this bulletin is intended for use only by skilled technicians who have the proper tools, equipment, and training to correctly and safely maintain your vehicle. These procedures should not be attempted by “do-it-yourselfers,” and you should not assume this bulletin applies to your vehicle, or that your vehicle has the condition described. To determine whether this information applies, contact an authorized Honda automobile dealer. © 2021 American Honda Motor Co., Inc. – All Rights Reserved Page 1 of 3 SOFTWARE INFORMATION NOTE: Unnecessary or incorrect repairs resulting from a failure to update the diagnostic and reprogramming software are not covered under warranty. Before beginning the repair, make sure all diagnostic and reprogramming software are updated as listed. i-HDS Software Version 1.006.026 or later HDS Software Version 3.104.014 or later J2534 Rewrite Software Information PC Application Version 1.2.1.1 Database Update 16-JUN-2021 or later NoticeDB Version 16-JUN-2021 or later Update only the systems and software listed in this service bulletin. American Honda has validated and approved the Denso DST-I as the vehicle communication interface (VCI) to support this service bulletin. For more information about updating vehicle systems, refer to service bulletin 01-023, Updating Control Units/Modules. Year/Model Vehicle System Program ID (or later) 2021 Accord LX PGM-FI 37805-6A0-A930 2021 Accord Sport PGM-FI 37805-6A0-AF30 2021 Accord Sport (Special Ed.) PGM-FI 37805-6A0-CG30 2021 Accord EX-L PGM-FI 37805-6A0-AG30 2021 Accord Sport (2.0 L) PGM-FI 37805-6B2-A940 2021 Accord Touring (2.0 L) PGM-FI 37805-6B2-C540 2021 Accord Hybrid LX, EX, EX-L PGM-FI 37805-6C2-A540 2021 Accord Hybrid Touring PGM-FI 37805-6C2-A640 2021 HR-V EX, EX-L (2WD) PGM-FI 37805-51M-AC20 2021 HR-V EX, EX-L (AWD) PGM-FI 37805-51M-AF20 2022 Odyssey PGM-FI 37805-5MR-C920 Page 2 of 3 REPAIR PROCEDURE NOTE: • Make sure the 12-volt battery is fully charged before starting an update. • Connect a fully charged jumper battery to the vehicle, and leave it connected during the entire procedure to maintain steady voltage. • Do not use the GR8 because the vehicle requires a steady electrical current. • Control module failure caused by the improper completion of a software update (early key cycle, low battery voltage, disconnected DLC cable, etc.) is not covered by warranty. • If an error occurs during the update or the i-HDS freezes, do not disconnect the battery or turn the ignition to OFF. Reboot the i-HDS, and start over. • To prevent control unit damage, do not operate anything electrical (headlights, audio system, brakes, A/C, power windows, door locks, etc.) during the update. • Warranty reimbursement for technician labor is not allowed for routine checking/installation of any available software update. 1. Update the PGM-FI software using the J2534 Rewrite software with the DST-i. Refer to service bulletin 01-023, Updating Control Units/Modules. NOTE: This update does not require entering a service bulletin number 2. Delete any DTCs. END Page 3 of 3