2020 Honda Odyssey · symptom sheet

Multiple warning lights come on at once

28owner reports
40,000median miles
$2,000median quote
0involved a crash

Newest report Jul 16, 2026 · checked Sep 9, 2026

204 of the 458 complaints on this car are about the electrical system. 28 of those describe warning lights.

Tick what matches of 28 reports

every light on the dash at once

it happened while driving

cleared after restart

the dealer found a module fault

What got replaced

Owners who name the part that was replaced mention the battery (6 reports), the module (4 reports), the sensor (3 reports) and the wiring (3 reports).

Recalls and investigations

2 recalls on the electrical system cover the 2020 model year. A recall on the same system isn't always the same failure, so read the defect text.

20V-440Jul 28, 2020

Electrical System:Software

Honda (American Honda Motor Co.) is recalling certain 2019-2021 Pilot, 2019-2020 Odyssey and 2019-2020 Passport vehicles. Incorrect central network software programming may cause several errors to occur that can delay or prevent the rearview camera image from displaying. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 111, "Rearview Mirrors."

Risk and remedy

Risk: A delayed or inoperative rearview camera display can reduce the driver's view of what is behind the vehicle, increasing the risk of a crash.
Remedy: Honda will notify owners that updated software is available. Owners have the option to either follow the mailed instructions to download and update the software for free, or visit a dealer to have the software update performed, free of charge. The recall began September 23, 2020. Owners may contact Honda customer service at 1-888-234-2138. Honda's number for this recall is Y7Y.

20V-066Feb 6, 2020

Electrical System:Wiring

Honda (American Honda Motor Co.) is recalling certain 2018-2020 Odyssey vehicles. The wire harness for the third row seat accessory power outlet may get pinched between the unibody and rear trim panel, possibly damaging the wires and causing an electrical short.

Risk and remedy

Risk: An intermittent electrical short could overheat the wire harness, increasing the risk of a fire.
Remedy: Honda will notify owners, and dealers will inspect the third row seat accessory power outlet wire harness for damage, replacing it as necessary. If no damage is found, the dealer will apply protective tape and re-route the harness. All repairs will be performed free of charge. The recall began March 16, 2020. Owners may contact Honda customer service at 1-888-234-2138. Honda's number for this recall is T6U.

NHTSA investigations into the electrical system on the Odyssey

PE12-026opened Oct 2, 2012

Electrical · model years 2003 to 2004

Ignition interlock failure - rollaway. Closed jan 14, 2013, led to recall 12V-573.

NHTSA summary

On December 10, 2012, Honda Motor Company submitted a defect information report to NHTSA regarding ignition interlocks in approximately 576,117 model year MY) 2003 through 2004 Honda Pilot and Odyssey vehicles that are the subject of this investigation and 231,044 MY 2003 through 2006 Acura MDX vehicles (Recall No. 12V-573).Honda's report states that a design change to the ignition switch used in the recalled vehicles reduced the range of rotation for the ignition switch from 160 degrees in earlier designs to 125 degrees without a corresponding change to the ignition interlock blocking mechanism.The result was that excessive rotational force could damage a lever that would allow the driver to remove the ignition key that was in a position other than the Park position, which may allow the vehicle to roll away.ODI identified 176 complaints related to the alleged defect, including 48 roll away crashes.Threeof the incidents resulted in the following injuries to pedestrians:1) a broken foot and torn Achilles tendon; 2) a fractured fibula and crush injuries to a shin area; and 3) an incident requiring unspecified treatment at a hospital emergency room.This investigation is closed.The VOQs associated with this investigation are: 10486515, 10486393, 10486100, 10485010, 10482229, 10482091, 10481169, 10481105, 10481079, 10481027, 10480804, 10480648, 10480099, 10480009, 10479934, 10479695, 10479561, 10479517, 10479494, 10479484, 10479437, 10479421, 10479409, 10479343, 10478916, 10478876

None of these investigations covers the 2020 model year.

What owners paid

6 of the 28 reports quote a price. Each dot is one quote. The middle half runs $1,300 to $2,500.

$1,300$2,000$2,500

$0k$2k$4k$6k$8k

When it happens

Too few of these reports state a mileage to give a range.

122

423

724

725

926

What owners wrote

“On July 4, my vehicle suddenly shut down. The dash lit up and then the engine just died. This happened twice that day. And again multiple times on July 9. The battery was replaced recently.”
Filed Jul 14, 2026

“one morning randomly multiple warnings turned on on the dashboard of my 2020 honda odyssey . the following warnings turned on and have stayed on since: Adaptive Cruise Control Problem, Lane Keeping Assist Problem, Collision Mitigation System Problem, Road departure Mitigation Problem, Auto High-beam problem, and Brake System. This appears to be a common issue when searching online and appears to be a sensor issue.”
Filed Jun 2, 2026

“Vehicle suddenly starts having multiple lights and warnings come up such as road departure mitigation, adaptive cruise problem, collision mitigation, auto high beam, etc. reading online it seems multiple people with honda oddysey are experiencing the same issues.”
Filed May 13, 2026

“There is some electrical or sensor issue with the 2020 Honda Odyssey EX-Ls. All my dashboard lights turn on, then I take it to the dealership to tell me they just had to do a system update. This is the 3rd time it has happened. This issue needs to be investigated. Honda is robbing me and many other owners of this issue.”
Filed Apr 24, 2025

Should you keep driving it?

This page can't tell you that. 0 of 28 reports involved a crash. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.

File your own report with NHTSA. Complaint counts are how a problem gets an investigation.