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About 12 months ago I started seeing an emissions error warning. It would come and go and seemed to have no impact on drive quality. Went in (at 58k and under warranty) and the dealer said they couldn't find anything. Yesterday (66k and no longer under warranty) all of the following lights came on -- similar to others' experience:

- Traction stability assist
- Hill start assist
- Lane divergence assist
- Emissions issue from before
- Power steering system
- Vehicle stability assist
- All-wheel drive system

Along with the lights, a day later the idle became noticeably more "aggressive," shaking the car. Took it in this morning and learned that it was the fuel injector issue that others had reported.

The bad news: the fix was $2,100 and wasn't covered under warranty. I challenged that since I had the information from this message board that others had the experience of the Emissions warning being the precursor to the greater issue.

The (somewhat) good news: It seems as though Honda of America knows of the problem and is trying to do the right thing for customers when they are made aware of the issue. After I challenged and told them I was aware of the commonality of the issue the service manager called Honda and they offered to "cover" 80% of the repair expense. Knowing what I've learned about the frequency of the 'indicator error" of the emissions system, I feel like the entire repair should be covered since they missed it the first time around. But...I am pleased that they offered the 80%.
 

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I have had this issue as well for quite some time. After reading through this thread, the guy who said disconnecting the battery and reconnecting fixed it was right. This fixed my problem as well.
Thanks a bunch!! You saved me some $$ as I’m pretty sure the Honda dealership would have suggested fuel injector replacement.
 

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2017 Honda Pilot Touring, 28k miles - all warning lights come on as others have noted (while on out of town trip a month ago). Performance slightly degraded, but not limp mode significant. Remote start and LKAS would not work. Referenced this thread (thanks to all of you!), and disconnected the battery. Everything re-set and the issue went away, temporarily. Yesterday (about 1 month and 1k miles later) the issue returned. It's now with the dealer. Will let you know outcome - expecting fuel injectors, sensors, software, spool valve, etc. based on others experiences.
 

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Update to earlier post - Following diagnosis of misfire on one cylinder, dealer replaced full set of fuel injectors, and pipe set fuel joint. Fortunately under warranty, so unsure of cost, although it was 3.1 hours labor (incl diagnostics). Running smoothly, and no longer blinded by panel full of trouble lights (transmission shifting also seems improved). Will return with post if it re-occurs. A long-time multi-Honda owner, with 2006 Pilot w/200k miles, hoping this 2017 Pilot confirms loyalty is well-placed.
 

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*** 2016 Pilot Touring, 51200 miles, idled for 4 months prior to a long trip on Thanksgiving week.
9 speed tranny gone through software update on 2017 due to rough shifting per customer's request (not TSB nor dealer).

Got the same issue while on a trip to Anaheim to Bay Area. First I noticed the fuel gas mileage to be performing much less satisfactory (22 MPG vs. 26 on the way going). So after a 6 hours trip almost home, I suddenly see the lights coming up:

Emission System Problem
Transmission System Problem
On top of that, we have the 'Keyless Start System Problem' going on for a few months but I thought it was the fob ?

So I asked my wife to pull over on the CA-152 on the hillside, thinking cooling it down could take us home. Then 5 minutes later, things go haywire with all of the lights came up like Christmas light, with the whole nine-yards of system problem lights:
  • Traction stability assist
  • Hill start assist
  • Lane divergence assist
  • Emissions issue from before
  • Power steering system
  • Vehicle stability assist
  • All-wheel drive system
Then the shifting sounds very scary while into N will have abrupt motion and click. We called the extended warranty for the tow back to a dealership on that night.

Dealership on the second day:
"Sir, we flashed the transmission software will replace the Start/Stop button after it comes in. That should not get you stuck in the future."

So my question to the people who's gone through with the same thing, is the service advisor just trying to get me out of door quickly? All the messages indicated that there could be mechanical problems, yet responses to me was on the software should fix it. I am a software person, but still can't buy it like that...
 

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*** 2016 Pilot Touring, 51200 miles, idled for 4 months prior to a long trip on Thanksgiving week.
9 speed tranny gone through software update on 2017 due to rough shifting per customer's request (not TSB nor dealer).

Got the same issue while on a trip to Anaheim to Bay Area. First I noticed the fuel gas mileage to be performing much less satisfactory (22 MPG vs. 26 on the way going). So after a 6 hours trip almost home, I suddenly see the lights coming up:

Emission System Problem
Transmission System Problem
On top of that, we have the 'Keyless Start System Problem' going on for a few months but I thought it was the fob ?

So I asked my wife to pull over on the CA-152 on the hillside, thinking cooling it down could take us home. Then 5 minutes later, things go haywire with all of the lights came up like Christmas light, with the whole nine-yards of system problem lights:
  • Traction stability assist
  • Hill start assist
  • Lane divergence assist
  • Emissions issue from before
  • Power steering system
  • Vehicle stability assist
  • All-wheel drive system
Then the shifting sounds very scary while into N will have abrupt motion and click. We called the extended warranty for the tow back to a dealership on that night.

Dealership on the second day:
"Sir, we flashed the transmission software will replace the Start/Stop button after it comes in. That should not get you stuck in the future."

So my question to the people who's gone through with the same thing, is the service advisor just trying to get me out of door quickly? All the messages indicated that there could be mechanical problems, yet responses to me was on the software should fix it. I am a software person, but still can't buy it like that...
This happened to me 3 times. First time the service dept. reset the system. Second time they replaced the valves. Third time I traded it in for the 2020 Pilot.
 

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This happened to my wife today. It is cold/snowy. It is a 17 pilot exl awd. 27k miles. Dashboard lit up like crazy. Car drove fine for a few miles. Restarts didn’t get rid of them. After reading this I disconnected the battery and that cleared up the lights. I cranked down on that battery nut though in case there was some metal shrinkage. Hope this works. Crazy this seems like such a common issue and also seems preventable if Honda engineering is up to par. Luckily this is a lease and I’ll be trading it in. Maybe Honda knows and fixed the issue on the 2020 model.
Any issues with any 18 or 19’s?
 

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Yesterday I had the same experience with a 2017 Honda Pilot Elite. The car only has around 17,000 miles and has never given me any problems whatsoever.

Yesterday morning I started the car using the remote (it was a cold morning). When I got into the car all kinds of warning lights and messages started popping up. With all these different - seemingly unrelated - concurrent errors I decided to drive it anyways. Turns out that the car was driving fine - no issue anywhere.

133579


I drove it around 25 miles before I arrived at Honda (Raleigh, NC). They took it in and after around 1.5 hours they told me it was the Fuel Injectors that had gone bad. This was unfortunately a common problem with the Pilot they said. I told them that I had read up on the issue and that I was a bit worried but they insured me that this replacement would fix all issues.

Below is a copy of the invoice. I was charged $0 (as I was under warranty) but when asked how much it would have cost otherwise they said around $1,400.

133580


The car seems to be fine now.

I'll update here again if my problem reappears.

The Honda dealer (I think independent from Honda) gave me great service I must say. They actually also mentioned that they are working with Honda on getting this issue covered outside the warranty period because it is such a common issue.
 

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2016 pilot intermittent emissions light for months with temperature changes , then recent christmas tree dash light effect . dealer scan triggered a18 025 service bulletin repair suggestion for all new fuel injectors. non dealer mechanic researched serv.bul. a18 010 indicating a loose sensing screw in alternator torqued properly and voila , fixed and running well for 1 month $40 vs $1800 no more dealer service for me
 

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Wow, great find.

NHTSA ID: 10128893
TSB ID: A18-010

Service bulletin - while driving, the customer may experience flickering interior/exterior lights, multiple indicators coming on, jerky steering and/or other voltage-related fluctuations. the b+ sensing screw on the alternator is not torqu [...]
 

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Re: 2016 Honda Pilot Touring, AWD
Having same issue for over a year now. It's a complete mystery, but I will tell you this, I have disconnected the battery twice so far and that clears the faults (downside is you lose all Bluetooth, radio channels, etc.), other times we just wait until the gremlin is tired and leaves the vehicle. I took to the Honda dealer and they also suggested the fuel injectors....when I asked how would that affect AWD, Towing Assist,etc. and the whole myriad of faults---the Service Adviser could not give an answer that made any sense. They wanted $1800 for the fix, I passed. In summation, what I've gathered here so far from these posts is the possible problems listed by others here:
1. Fuel Injectors
2. Wiring Harness
3. Temperature changes
4. Loose battery connection
5. A loose sensing screw in alternator torqued improperly

Recommend ALL People having this issue open up a case with Honda America. You can reach them at (800) 999-1009. I opened my case and will drive to a different dealer to see if there is another explanation besides the injectors, this was the recommendation from Honda USA. Ironically, I am over 50 and this is my first Honda--how awesome is that?
 

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This morning wifey called me and said that there were multiple warning lights on the car and it was beeping angrily at her. Luckily, this malfunction occured within a mile of the house. I went to swap cars with her and drove it home to deal with it further. The warning lights were:

-road departure mitigation system warning
-trailer stability assist warning
-hill start assist warning
-vehicle stability assist warning
-emissions system control warning

Of course on the drive to the dealer, about two minutes away from pulling in, the warnings disappeared. Luckily, atleast I took pictures.

Took it into dealer, they said may be alternator but will call me with updates.
[/QUOTiE] I got the same warning lights plus the AWD warning light. I called Honda of America to report it. Representative said no recall on it and I should bring to the dealer since they are the eyes and ears for the manufacturer. I'm dreading what I have read already. I hope the dealer have dealt with something similar and I'm not the first for them to case study.
 

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Mine came on last night 3/8/2020 with the addition of AWD warning light. I'm scheduled to visit the dealer tomorrow. Based on my readings, it doesn't sound like Honda and engineer got a handle on the problem of similarity. At 58,774 miles and out of basic warranty, this is not history quality of Honda products. I contacted Honda of America and was directed to visit local dealer.
 

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I have a 2016 Honda pilot EXL and I had multiple warning lights on the dashboard come on on 4 13 2020. I had the power steering warning light The omissions light the hill assist light Lana says all the lights. I brought it to the dealer in Watertown Connecticut and referenced service bulletin 18 Dash 025 and they replaced the fuel injectors in the car seems to be fine
 

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Mine came on last night 3/8/2020 with the addition of AWD warning light. I'm scheduled to visit the dealer tomorrow. Based on my readings, it doesn't sound like Honda and engineer got a handle on the problem of similarity. At 58,774 miles and out of basic warranty, this is not history quality of Honda products. I contacted Honda of America and was directed to visit local dealer.
Referred to the service bulletin 18 Dash 025 fuel injectors seem to fix my problem exactly the same as yours same mileage to
 

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Since adjusting the alternator screw I have had one further visit from the dash light ghost. Again, onset with big temp. change and slushy conditions. It was back to normal the next AM. Car runs perfectly well since , nothing to suggest a fuel injector issue. I believe somewhere there is a bad electrical connection aggravated by temperature change and moisture. We'll see what happens next winter.
 

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Well, I've just been struck by the multiple-error phenomenon this AM on our 2016 Pilot Touring. We've had the emissions problem light come on and off for the last few months--dealer checked it and said they couldn't find anything wrong and they suspected something with the fuel cap (I assume they mean the fuel "flap" as there isn't a cap obviously). This morning, each of the following errors came on in 5-8 second intervals--Emissions System Problem, Power Steering System (EPS) Problem, Vehicle Stability Assist (VSA) Problem, Hill Start Assist Problem, Trailer Stability Assist Problem, Road Departure Mitigation System Problem. Lane Keeping Assist System would NOT engage at speed, but cruise control and following would (also uses radar). Our car has just under 76k miles. I'm fed up with it, and with a new driver in our house, the Lane Keeping not working is a non-starter for me. I haven't seen any mention of others having problems outside of the 2016 and 2017 model years, so we may be trading this piece of junk in. The 9-speed transmission has been jerky from DAY ONE, and the dealer told us it was normal. Not pleased. Also, looking for any advice on Honda USA covering a portion of costs, for those of you that succeeded in getting some of the bill covered, what sequence should I follow? Do I get the repair first (injectors, probably is what they'll want to do it seems, and then petition for a reimbursement? I have a video but it's 63 MB.
 
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