[daveydover2012]

Same issue here what was thr final diag?

 

[rodriguez.truckingjr]

Same issue with my 2018 accord… Tonite I was driving with all that warning light on hit a bump and they went away.. makes think now that all this could be a faulty ground problem .. has anyone thought about that ? Or check the ground cables?

 

[Livsxo]

Yeah it happens on my honda accord ex and the dealership does not know why i hate it because i feel unsafe the brakes get all tight when those error codes appear but honda has my money they dont care . My last car was a 2016 honda civic i loved it so thought id do honda again after i slipped on black ice earlier this year and totaled that one went with honda accord ex 2018 only to be out money and a car now Did a new battery help ?

I have the exact same issue currently and they’re saying it’s the rocker arm but I don’t believe so. Did anyone find out what the problem was with there’s.

 

[broadwayyellow]

This occurred to me as well while waiting for a ferry boat. It turned out to be the 12V battery, in the engine compartment. $136 for a new battery from Honda and all is well again. It's a peculiar indication when the 12V battery gets too low on a Hybrid vehicle.

 

[Hondaacxodd]

I had the exact same issue and took mine to the dealer. They pointed out that my back driver taillight was full of water and shorting the system. They said it's very common. They wanted 600 plus dollars to replace the taillight and clear the codes. I was skeptical that this was the issue so I refused repair and took it home and drilled 2 holes in the bottom to let the water drain, then I used compressed air. After 1 day of driving all faults are gone, and I have not returned. I may or may not replace the taillight later as the holes are unnoticeable.

Did you have a loss of power or just lights on the dash?

 

[Sharondam006@gmail]

Hello,

I have had all warning lights pop up in my 2018 Honda accord multiple times now. The first time I brought the vehicle into the dealership in June and the supposed issue was rodent damage. This was not covered under warranty so I paid to have that repaired. Near end of July I pumped gas into the car and went to start it up after and I had 5 warning lights on including the Emission system problem, ACC, Lkas and two other alerts. I brought vehicle into the dealership a 2nd time and this time they said it was an issue with the CMP sensor. This was under warranty so they fixed the vehicle the 2nd time. Today I'm riding back and I'm almost home and all warning lights appear again so I took a photo of them all. These include Emissions system problem, ACC, LKAS, Brake system, Tire pressure, road departure mitigation, electric power steering, vehicle stability, hill start and collision mitigation.

Has anyone else had similar issues it's a 2018 accord with 16000 miles on it. View attachment 533079 View attachment 533080 View attachment 533081 View attachment 533082 View attachment 533083 View attachment 533084 View attachment 533085 View attachment 533086 View attachment 533087 ⁶
Yes… something exact thing happened to me… yesterday when my husband put gas in… all the lights came on. What was the final outcome on your in

 

[jaliyah948]

Hello, I have had all warning lights pop up in my 2018 Honda accord multiple times now. The first time I brought the vehicle into the dealership in June and the supposed issue was rodent damage. This was not covered under warranty so I paid to have that repaired. Near end of July I pumped gas into the car and went to start it up after and I had 5 warning lights on including the Emission system problem, ACC, Lkas and two other alerts. I brought vehicle into the dealership a 2nd time and this time they said it was an issue with the CMP sensor. This was under warranty so they fixed the vehicle the 2nd time. Today I'm riding back and I'm almost home and all warning lights appear again so I took a photo of them all. These include Emissions system problem, ACC, LKAS, Brake system, Tire pressure, road departure mitigation, electric power steering, vehicle stability, hill start and collision mitigation. Has anyone else had similar issues it's a 2018 accord with 16000 miles on it. View attachment 533079 View attachment 533080 View attachment 533081 View attachment 533082 View attachment 533083 View attachment 533084 View attachment 533085 View attachment 533086 View attachment 533087 ⁶

Yes mine has been this way for several months. Honda doesn’t know what it is. I’ve changed the battery TWICE, the transmission, the ECM, the spark plugs and coils. My lights are STILL on.

 

[cakaminski88]

Can we PLEASE PLEASE PLEASE make this a sticky: IF ALL YOUR WARNING LIGHTS COME ON IT IS THE BATTERY OR THE BATTERY CABLES!!!

We changed the battery reset everything and our lights still keep coming back on.

 

[greg1c]

The lights are just telling you those systems are offline and/or not working or degraded. Almost anything can cause that to happen. The bottom line is this, at the minimum you need to scan for codes. You really need an interactive diagnostic tablet to query all modules and run tests on those things that are failing.

Sent from my Pixel 5 using Tapatalk

 

[HankE]

I'm in the same boat with the wife's car. 2018 Accord EX-L with 48,500 miles. Two to three weeks ago I got the same symptoms. All the warning lights on. Plugged in the OBD2 reader and all I got was P0301, #1 cylinder misfire. Thanks to the advice offered here, disconnected the battery, waited a while, reconnected battery and cleared the code. Waited 10 minutes for all the boxes to talk nicely with each other. Took it on a 10 mile drive and it appeared fixed.

Well it's back. Same thing. All warning lights on and the same P0301 code. Approximately 350 miles driven since the last incident. Battery is one year old. Granted it's been very hot this summer in the deep south so the battery may be compromised. Taking it to Interstate tomorrow to have it looked at.

To troubleshoot the P0301 code I swapped the #1 and #4 coil packs. If the coil pack is bad I should get a P0304 code. If I get the same P0301 code then it's something else.

As greg1c said, get yourself a OBD2 reader. Got one to troubleshoot my Toyota Tundra. Code thrown was a fuel vapor carbon canister fault. Toyota wanted $1000 to repair. Did it myself with a $180 salvage part, an hour of my time, and two beers. Search for Autel MS300 on Amazon. $17.

 

[Robokam]

Same issue with my 2018 accord… Tonite I was driving with all that warning light on hit a bump and they went away.. makes think now that all this could be a faulty ground problem .. has anyone thought about that ? Or check the ground cables?

I have a 2019 Accord 2.0T 6MT and have changed the battery last year. I couple times since changing the battery I had the errors flash on my car. I know it probably wasn't the battery since it's only been a year since replacing it, but I noticed that the negative terminal wasn't really tight even though the bolt was tightened down. The first time I tried cleaning the post and terminal with a wire brush and that seemed to fix it for a while. Then recently it happened again and I again noticed that it didn't feel real tight on the post. I took off the terminal again and tried crimping the terminal opening a little so that it would be tighter when attaching it to the post. I retighten everything and now it feels real snug like it won't move and I haven't had the problem again.

 

[HankE]

Reference Post #90. Took the battery to Interstate Battery where I bought it. Ran the test on it and it failed. "Your cranking amps is nowhere near where it needs to be." Got a new battery for no charge under their 24 month warranty. Installed the battery, cleared the fault code, and took it on the same mile 10 test drive as last time. Ran and drove like it should. Returned and scanned with the OBD2 reader. Nothing. Just an entry for the previous fault. No current or pending faults.

Primary driver puts about 600 miles a month on it. I'll keep an eye on it and report back here.

Oh, the battery that failed? It had been in the car 1 year and 16 days.

 

[sharpe6059]

This is ridiculous, I just went through the same my 2018 Accord 1.5 sport all warning lights lit on and started to read comments on forums like this and thought replacing the battery will fix the problem well it did for about a week but that’s not a fix your warning lights will go away but because the battery is being replaced and will reset the codes and warning lights but will come back or at least in my case it did so I took it to auto zone to have it scanned and it apparently was a misfire on cylinder number 3 they told me it could be an ignition coil that went bad but still recommended to take it to the dealership or to a mechanic to diagnose the problem luckily for me I remembered that I had bought the rip off extended warranty (first time not regretting buying it) so I took it to the dealership, after about a week of diagnosing they told me the coolant is leaking into cylinder number 3 due to a blown engine head-gasket but they had already reached out to the extended warranty department and all I had to pay was a type of deductible of $100 dollars, so not bad for a major repair like this, that I would’ve had to pay almost 5K out of pocket, but then again a blown engine head gasket at barely 70K miles on a Honda that has been well taken care of, all maintenance done and performed on time by the dealership service department and believe me that didn’t even punish the engine just normal driving nothing crazy not high reviving nor burning tires nor racing, so I asked the service advisor if it had something to do with the engine flaw that everybody knows about, the oil dilution on all 1.5 engines, but obviously he said no because they don’t want to recognize that that’s been a big problem with the design of these engines from Honda, but at least they were able to fix my car at no extra cost for me, but oh boy! I’m not so sure about these guys doing such a good job, I went to pick up my car after they called me to say that it was ready, so I rushed to get out of work to make it on time before they’re closing for the day, and I drove back home and as soon as I got home popped up the hood just to find a bunch of loose parts, the windshield wiper fluid reservoir completely unattached and were missing those plastic rivets to keep the liners in place and bolts and brackets that you could tell by seeing the shiny part of the engine compared to the dull or opaque rest of it, so I took it back and pointed out to them, I’ll be picking it up Monday and we’ll see what they did this time, wish me luck, and by the way don’t take your car for service at this dealership they’re just not good at what they do (Honda City in Chicago) I had had some other bad experiences but this last one is the worst of them all, everything there since sales to service department is a no don’t even think about going there for your own good.

I got my engine replace and still got the all lights coming on after a week. What is the problem battery is new

 

[sharpe6059]

Hello,

I have had all warning lights pop up in my 2018 Honda accord multiple times now. The first time I brought the vehicle into the dealership in June and the supposed issue was rodent damage. This was not covered under warranty so I paid to have that repaired. Near end of July I pumped gas into the car and went to start it up after and I had 5 warning lights on including the Emission system problem, ACC, Lkas and two other alerts. I brought vehicle into the dealership a 2nd time and this time they said it was an issue with the CMP sensor. This was under warranty so they fixed the vehicle the 2nd time. Today I'm riding back and I'm almost home and all warning lights appear again so I took a photo of them all. These include Emissions system problem, ACC, LKAS, Brake system, Tire pressure, road departure mitigation, electric power steering, vehicle stability, hill start and collision mitigation.

Has anyone else had similar issues it's a 2018 accord with 16000 miles on it. View attachment 533079 View attachment 533080 View attachment 533081 View attachment 533082 View attachment 533083 View attachment 533084 View attachment 533085 View attachment 533086 View attachment 533087 ⁶

I got a new engine because they said it was head gasket blown , then I got a new battery and it is still happening do you know what fix is

 

[smdb1618]

Just throwing my experience in here. All my system warning lights came on, couldn't get any codes with my OBD reader. Disconnected the battery for a half hour, still same issue. Drove to Autozone to see if they had any luck. Guy puts the reader on, after a minute pulls it off. Without saying a word, proceeds to get distracted by and stare at a black cat walking in the parking lot for probably a minute (but felt like an eternity). Finally motions for me to come back inside and apologizes for getting distracted by said cat. Gives me the printout with 4 codes (2 for left rear wheel speed sensor, 1 for Battery Voltage Above Threshold, and one for EPS Control Unit Internal Malfunction). I go back out to my car, turn it on and everything is fine. Went back in, they said their reader doesn't reset anything. Got home, cleaned the battery terminals with the $3 tool they sold me, and reconnected and still everything is fine. At a complete loss for this, fuck you Honda.

 

[sharpe6059]

Just throwing my experience in here. All my system warning lights came on, couldn't get any codes with my OBD reader. Disconnected the battery for a half hour, still same issue. Drove to Autozone to see if they had any luck. Guy puts the reader on, after a minute pulls it off. Without saying a word, proceeds to get distracted by and stare at a black cat walking in the parking lot for probably a minute (but felt like an eternity). Finally motions for me to come back inside and apologizes for getting distracted by said cat. Gives me the printout with 4 codes (2 for left rear wheel speed sensor, 1 for Battery Voltage Above Threshold, and one for EPS Control Unit Internal Malfunction). I go back out to my car, turn it on and everything is fine. Went back in, they said their reader doesn't reset anything. Got home, cleaned the battery terminals with the $3 tool they sold me, and reconnected and still everything is fine. At a complete loss for this, fuck you Honda.

Same thing happens minus cat but in a few days will come back

 

[samsayrham]

2020 accord - it’s not the battery. If you disconnect battery then go for a drive it clears out. The error will come back few days after. I been noticing it comes up when the car is going up hill climb. The dealer stated it’s the turbo that’s having a problem. I think it’s total bs car is 3 yrs old to have this problem it should be a recall.

 

[HankE]

Reference posts 90 and 92. Primary driver has put on 500 miles since the battery was replaced. No codes. No warning lights. In my case at least it was the battery having an early failure.

Having said that I strongly suggest that you treat codes thrown in just a few days or weeks after clearing the fault as something wrong with the vehicle. An OBD2 reader is cheap, works with most vehicles, and can save you being stranded on the side of the road. Also, pick up a proper battery terminal brush. Apparently our cars demand very clean battery connections.

 

[CtLank]

I got my engine replace and still got the all lights coming on after a week. What is the problem battery is new

just curious when engine swap did they use same wiring harness?

 

[CtLank]

Well Im on here, so ill tell you my ordeal, I bought the Honda Accord '18 with 1.5 in 2019 with 22K miles. It popped with these same problems within a few months, ive been to Dealership a couple times over it, they can't figure it out. It doesnt show any pertinent codes at Autozone. If you take the battery off it fixes for a few days. The first year it went off when cold weather came (drier i think) then as soon as it hit May in the south, they are back on. They can go off for a week or so then it rains and We're back! The car has hit Limp Mode a couple/three times since all this has been happening. Turning it off and letting it rest has always fixed that, or taking battery cables off. Its sad when a new Honda can't keep up with a 25 yo GMC. I wish we could turn back time to when new cars were worth the money. I worked at Denso and future plans according to upper mgt, car companies are wanting to add 4 times as many sensors to each quadrant of the car. So this is just going to get more and more fun/ridiculous/irritating. Now back to figuring out struts and shocks that are supposedly out on my SAME, well taken care of, 75000mile, POS accord.