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Service bulletins for the 2018 Honda Odyssey

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

278 on file from NHTSA, as of 2026-10-19.

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By component

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
A21-0102021-02-18. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE AND ENGINE COOLING. "Service Bulletin - The PCM software may misinterpret sensor inputs as a deteriorated catalytic converter. Additionally, debris from the high pressure pump or the fuel injector machining process can cause internal wear or clogging inside one or more injectors. One or more of the following DTCs may be stored: - P0420 (rear bank catalyst system efficiency below threshold [bank 1]) - P0430 (front bank catalyst system efficiency below threshold [bank 2]) - P0300-P0306 (misfire) - P219A (air-fuel ratio variation of cylinder [bank 1, rear bank]) - P219B (air-fuel ratio variation of cylinder [bank 2, front bank]) American Honda is extending the warranty on these repairs to 10 years from the original date of purchase or 150,000 miles, whichever comes first."
A20-1002021-02-18. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); FUEL SYSTEM, GASOLINE; ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING. "Service Bulletin - The PCM software may misinterpret sensor inputs as a deteriorated catalytic converter. Additionally, debris from the high pressure pump or the fuel injector machining process can cause internal wear or clogging inside one or more injectors. One or more of the following DTCs may be stored: - P0420 (rear bank catalyst system efficiency below threshold [bank 1]) - P0430 (front bank catalyst system efficiency below threshold [bank 2]) - P0300-P0306 (misfire) - P219A (air-fuel ratio variation of cylinder [bank 1, rear bank]) - P219B (air-fuel ratio variation of cylinder [bank 2, front bank]) American Honda is extending the warranty on these repairs to 10 years from the original date of purchase or 150,000 miles, whichever comes first."
A21010C2021-01-30. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ELECTRICAL SYSTEM. ServiceNews Article - We have received information from the vendor (Alpine) that display panels are being replaced for cracks on the center display screen. When they review these parts, they're finding that an aftermarket screen protector had been installed and that the screen protector is cracked. So, if you have a center display that appears to have a cracked screen, confirm that it does not have an aftermarket screen protector installed. If installed, remove it, and then check if the center display screen itself is cracked.
A20-1022020-12-19. Service bulletin. ELECTRICAL SYSTEM. Service Bulletin - The Bluetooth HandsFreeLink (HFL) system freezes after a phone call and stored voice tags are missing when the ignition is turned ON.
A19-0722020-12-02. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). "Service Bulletin - The MIL comes on with DTC P0430 (front bank catalyst system efficiency below threshold [bank 2]). Additionally, one or more of the following DTCs may also be stored: -P030X (misfire) -P219A (air-fuel ratio variation of cylinder [bank 1, rear bank]) -P219B (air-fuel ratio variation of cylinder [bank 2, front bank])"
A20-0492020-10-21. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Service Bulletin - There is a popping or crackling from the speakers or no sound from the audio system. You may also see a Network Loss message.
ONL6HP092320202020-10-03. Service bulletin. ELECTRICAL SYSTEM. Owner Notification Letter - On 2018 Odyssey EX, EX-L, Touring, and Elite trim levels, the Display Audio and rearview camera stay off during a quick ignition cycle. To correct this, an audio software update is available. Honda strongly recommends updating your vehicle as soon as possible.
APTD072920202020-08-06. Service bulletin. ELECTRICAL SYSTEM. Dealer Message - Service Bulletins A20-058 and A20-049 are now released to address popping or crackling noises from the speakers, no sound from the audio system, or possibility of a "Network Loss" message due to a poor connection in the MOST Bus Network. Previous distance learning provided temporary repair procedures to address these complaints, and now we've updated the training to address the latest information provided in the bulletin.
APaS072920202020-08-05. Service bulletin. ELECTRICAL SYSTEM. Dealer Message - On Monday July 27th, American Honda released Service Bulletin 20-049 for 19-20 Odyssey. Service Bulletin 20-058 for 19-21 Pilot and Passport is forthcoming. These service bulletins are for "Popping or Crackle From Speakers, No Sound From the Audio System, Network Loss Message and/or Display Issues".
A20-0592020-08-05. Service bulletin. BACK OVER PREVENTION; ELECTRICAL SYSTEM. Service Bulletin - The Display Audio and rearview camera stay off during a quick ignition cycle.
A20060B2020-06-25. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM. ServiceNews Article - We've been getting reports that incorrect parts are being ordered when trying to order an infotainment control unit from Denso. Service techs and/or parts specialists are ordering a range of incorrect parts for issues related to this unit. This is due to a change in the Remanufactured Parts Order form.
A19030B2020-05-05. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. Servicenews article - Are you hearing a popping or crackling from the speakers? This may be due to a connection issue in the MOST bus network or a harness/wiring issue.
A20-0132020-05-05. Service bulletin. ELECTRICAL SYSTEM. Service bulletin - The RES screen will freeze or go blank while in use, and a Camera System Problem. Image cannot be displayed message appears on the Display Audio screen when using CabinWatch (if equipped). The RES control unit may have a software or hardware issue.
A20-0132020-03-11. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL. Service Bulletin - The RES screen will freeze or go blank while in use, and a Camera System Problem. Image cannot be displayed message appears on the Display Audio screen when using Cabin Watch (if equipped).
ATS2002012020-03-03. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Tech Line Summary Article - There was a provisional procedure provided to all field engineers to attempt the repair of certain customers' vehicles that might have experienced issues related to the MOST connectors, resulting in the audio system shutting down and the speakers making popping noises.
A19-0282020-02-19. Service bulletin. ELECTRICAL SYSTEM; STRUCTURE. Service Bulletin - When closing the power sliding door, it reverses direction. There is a software issue that may falsely detect an obstruction causing the power sliding door to reverse direction while closing.
A19070E2020-02-04. Service bulletin. ELECTRICAL SYSTEM. "ServiceNews Article - Are you having this issue while using Apple CarPlay? -It beeps and stops working. -If you try to switch to a different audio source, you see the message XM-Check Tuner or FM-Radio Unavailable. -When you turn the ignition to OFF, the Display Audio stays on."
APaS012420202020-01-29. Service bulletin. ELECTRICAL SYSTEM. Dealer Message - Popping or Crackling noise from the speakers is a current market issue that affects 2018-2020 Odysseys, 2019-2020 Passports, and 2019-2020 Pilots. We are actively investigating this issue. Until a complete countermeasure is available, we would like to make you aware of a Honda Service News dated December 2019, "Popping or Crackling from the Speakers? Check MOST Bus Network." This Service News shows some examples of problem areas found during repairs and offers suggestions for how to isolate the source of the noise.
APP010320202020-01-09. Service bulletin. ELECTRICAL SYSTEM. Dealer Message - The January episode of Tech2Tech is now posted. We've got some valuable information for you, so check it out! This month we're featuring "Check Out the MOST Bus Network Failure Log!"
AAMV2001012020-01-09. Service bulletin. ELECTRICAL SYSTEM. Video Message - It concerns the MOST Bus Network Failure Log covered in service bulletin 19-097. The log helps troubleshoot intermittent MOST bus network failures. These are failures with symptoms that can range from complete signal loss and a blank screen to popping from the speakers. Failures are identified as one of these two possible types 1) sudden signal off and 2) critical unlock. Please let us know if you would like a copy of the video sent to you on a DVD or thumb drive.
AAMV2001022020-01-09. Service bulletin. ELECTRICAL SYSTEM. Video Message - It concerns the MOST Bus Network Failure Log covered in service bulletin 19-097. The log helps troubleshoot intermittent MOST bus network failures. These are failures with symptoms that can range from complete signal loss and a blank screen to popping from the speakers. Failures are identified as one of these two possible types 1) sudden signal off and 2) critical unlock. Please let us know if you would like a copy of the video sent to you on a DVD or thumb drive.
A19030B2020-01-08. Service bulletin. ELECTRICAL SYSTEM. ServiceNews Article - Are you hearing a popping or crackling from the speakers? This may be due to a connection issue in the MOST bus network or a harness/wiring issue.
A19-0972019-12-18. Service bulletin. ELECTRICAL SYSTEM. Service Bulletin - Vehicles with system software version B.1.0.24 or higher now have the capability to log MOST bus network failures.
APaS111420199112019-11-20. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY. Dealer Message - American Honda Motor Co., Inc. (AHM) is requesting instrument panel bracket inspections of ALL 2018 Odysseys that fit the criteria listed below.
ONL6GP11082019_42019-11-16. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; ELECTRICAL SYSTEM. Owner Notification Letter - On 2018-20 Odyssey EX, EX-L, Touring, and Elite trim levels, the Display Audio screen may show the clock being off by 1 hour. To correct this, an audio software update is available. Honda strongly recommends updating your vehicle as soon as possible.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.