2018 Honda Clarity Plug-In Hybrid Battery Failure at 108k Miles – $10,000 Repair Quote, Honda Customer Care doesn't care

From what I have seen in Clarity forum discussions on this topic, I have yet to come across a warranty replacement that was approved solely under the 36.6Ah policy, without an engine code and/or accompanying symptoms.

The P0A7F and P1DC7 combination appears to be the primary basis, and by far the most common reason, on which Honda authorizes battery pack replacements. This leads me to believe that the vehicle’s computer ultimately determines whether the degradation is considered abnormal.
 
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Here’s another theory. The Clarity has an A and B battery. Each has a capacity of 27.5Ah When connected in parallel the capacity is doubled to 55Ah. Is it possible that the dealer has measured, or provided, the capacity of half of the battery? Also, was a 12V battery recently installed, or disconnected for a period of time?

It’s been a while since I’ve seen one of those diagnostic reports, but I recall that there was separate information provided for A and B. We could be looking at an inaccurate reading due to a 12V reset combined with a serious lack of communication between the dealer and owner.

Have there been any Codes thrown, alerts shown on the display, noticeably decreased EV range or loss of performance from the vehicle? Regardless, if you’re going to pursue a battery warranty claim it would benefit you to have a copy of the 36.6Ah document to show the dealer and include in any correspondence with Honda.

Why they would say that your 2018 VIN isn’t covered makes about as much sense as the L2 EVSE or usage habits claim. Keep in mind that Honda only provides a L1 EVSE with the vehicle and there are no cautions or warnings in the manual about not using it.
 
I can confirm that at least in our case battery replacement under warranty was initiated by the check engine & power system warning lights and associated codes - the actual battery capacity was, to my knowledge, never measured directly.
 
We got the Jeep back with a new HV battery a few weeks ago. Within a couple of days Electric mode became unavailable. The explanation on the display was that it was because cabin heating/cooling was on. It wasn’t. We scheduled an appointment and it turned out the battery heating and cooling module needed replacing. All was well for about a week when the same issue surfaced again. In this case cabin heating was on. After turning it off Electric mode became available. I then turned cabin heating on after which it continued to operate in Electric mode. It hasn’t occurred since, however, I do not consider the vehicle to be functioning properly if a call for cabin heating/cooling knocks Electric mode off-line. It won’t be our concern much longer.

I also received correspondence from FCA that the battery is now covered for Unlimited time and mileage, with conditions. Those conditions are that should any one of 5 codes appear, after the expiration of the original battery warranty, FCA has the option to limit the coverage to the cost of the battery replacement or the value of the vehicle (NADA retail) at the time, whichever is less.
 
We got the Jeep back with a new HV battery a few weeks ago. Within a couple of days Electric mode became unavailable. The explanation on the display was that it was because cabin heating/cooling was on. It wasn’t. We scheduled an appointment and it turned out the battery heating and cooling module needed replacing. All was well for about a week when the same issue surfaced again. In this case cabin heating was on. After turning it off Electric mode became available. I then turned cabin heating on after which it continued to operate in Electric mode. It hasn’t occurred since, however, I do not consider the vehicle to be functioning properly if a call for cabin heating/cooling knocks Electric mode off-line. It won’t be our concern much longer.

I also received correspondence from FCA that the battery is now covered for Unlimited time and mileage, with conditions. Those conditions are that should any one of 5 codes appear, after the expiration of the original battery warranty, FCA has the option to limit the coverage to the cost of the battery replacement or the value of the vehicle (NADA retail) at the time, whichever is less.
Does the Unlimited battery coverage transfer to the next unfortunate owner?
 
There was nothing in the wording that suggested it would not transfer to another owner, so I’d say yes.
That warranty will make your Jeep easier to sell to an individual. If you instead sell to Carvana, I hope they don't charge for the halo.

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We’ll probably decline the halo option. If you’re interested it is located in Michigan and includes an extra set of wheels with Blizzak snow tires that had very little use last winter. It’s set up to tow behind another vehicle as well as being able to tow a trailer. Did I mention it has a new battery?
 
If I may make so bold as to steer the thread back to the OP's topic......I've encountered the codes mentioned in Andy's "First Diagnostic" several times this winter, along with the dimly-lit "Power System" caution light. On first encounter, my battery capacity had gradually degraded to something (unremembered) just north of 38 AH, maybe 39 and a (small) fraction, as measured by the "Carscanner" app and ELM327 OBD module.

Upon code-clearing, battery capacity was reset to 55 AH and EV range on the GoM instantly jumped from 23, or thereabouts, to 37. I encountered the codes in HV and Sport mode, about 30-40 minutes into a 70+mph hwy transit. Cleared after exiting the freeway, spending a few minutes in city/neighborhood driving and shutting down for the code-clear. Having begun the journey in HV mode (Sport departed at code debut) I was showing a typical 87-89% SoC per the App. Best recollection of that morning is that I began fully charged, overnight on the Lvl2 charger showing 31 miles of EV range.

Subsequent full charges resulted in 45-47 miles of EV range on the GoM. "Wait a minute, AHol" you may be saying to yourself, if not to another....."Can't possibly be accurate..you can't "Restore" the battery by resetting the codes!" And I would answer you, "OF COURSE it is not ACCURATE, it never has been....but it was NO MORE INACCURATE than before the reset." Highway runs at 65 or 70+ mph will deplete EV range at 2x+ actual statute miles driven, whereas stop-n-go city work <35 mph will get you 1.25-1.5 statute miles for each mile of EV range. Same before/after reset.

Codes returned a few weeks later under near identical conditions: Highway, 65+ mph run on a sub-30F day. Identical experience after shutdown and code clear. I think it happened one more time after that. Wasn't quite as cold, but not what I'd call "warm" either. Now that NTX has warmed up a bit, it is not unusual to see 48-49 mi EV range on a full charge. Battery Capacity has decayed to 50.54 AH since last code-clear. Not sure...maybe a month or two ago. I normally charge LVL2 @16A, but last couple of weeks, have been charging at 32A.

FWIW, car is a 2019 Touring model with 180,500 miles. I obtained it in 2022 with about 96K on the odo.

Andy, you could do a lot worse than splurging $30 for the OBDII module and $5 for the CarScanner app, both recommended in the Battery Capacity thread and clearing your codes. At worst, they would return immediately, along with the same driveability issues and you'd be out about $40.

For grins and giggles, I had the car at Norm Reeves Honda Superstore in NRH, TX a couple weeks ago for Oil Change and Tire rotation and specifically requested a quote (I distinctly said "Cost AND timing") for hybrid battery replacement. I didn't get any response on the "timing" issue, and they did not itemize parts and labor, but did come in at $10,688.39, or very close to the $10,700 quoted in previous posts, this thread.
 
Since Stellantis was formed, instead of improving the reliability of their Italian marques they seem to have given all their other brands the reliability of the Italians. Unfortunate. I guess its not as bad as a Vinfast!
 
Since Stellantis was formed, instead of improving the reliability of their Italian marques they seem to have given all their other brands the reliability of the Italians.

Perhaps you’re oblivious to the complaints about Honda on this forum. Regardless, your digs add nothing to the discussion. Carry on as you please.
 
Perhaps you’re oblivious to the complaints about Honda on this forum. Regardless, your digs add nothing to the discussion. Carry on as you please.
They are not just digs, which you do seem to so enjoy. As a 50 year Peugeot owner and a 27 year Citroen owner I do not like the direction Stellantis is going. Although Honda has gotten worse the last 10 years, their problems are still relatively minor compared to most marques.
 
They’ve changed direction somewhat since replacing the CEO two years ago who was fingered for many of their problems. It may take some time to undo the mess and the industry in general is in turmoil. FWIW: the 2025 Ram 1500 with the Hurricane engine was crowned Truck of the Year by Motor Trend.

While our Jeep 4xe has been problematic, when it is functioning properly it is a far more enjoyable vehicle to drive than the Clarity. Regardless, I have no interest in owning a PHEV from any manufacturer
 
It sounds like Honda's ready to throw in the towel ('We Have No Chance Against This') after experiencing China's vehicle manufacturing infrastructure first-hand.
Thanks Insightman, great article. It doesn't mention one potential help for the west, that Chinese companies are focused on EVs and might not have high interest in expanding into the ICE vehicle business since they think it is a a limited time market. I highly recommend the book "Apple in China". It explains how this all started over 20 years ago, and clearly shows that Apple's operations in China is why this all happened so fast. Its all Tim Cook's fault!
 
I’m a 20+ year Honda-only driver … multiple Pilots, a CR-V, and a Clarity in the household. I wanted to share my experience in case it helps other Clarity owners understand what the process may look like if a major hybrid system issue occurs outside warranty.

Problem
My 2018 Honda Clarity Plug-In Hybrid recently displayed the “Power System” light. It activated and deactivated for a few weeks. Operation remained normal. Doing some research, I replaced the 12V battery because it could be a potential simple fix.

First Diagnostic
I brought the vehicle to a Honda dealership for a diagnostic and the dealer reported the following codes:
  • P0A7F – Hybrid battery deterioration
  • P1DC7 – Battery pack deterioration
The recommended repair was replacement of the entire HV battery pack:
  • Battery pack: ~$8,700
  • Total repair estimate: ~$10,700
Immediately after the diagnostic Power System light remained and a new “Plug In Charging System Problem. Range Limited” warning appeared upon startup. The vehicle would no longer enter Eco mode, and would no longer initiate charging from the wall.

Honda Customer Care Case

I opened a case with Honda Customer Care to request some sort of assistance. I thought the combination of being a loyal Honda-only household, the vehicle being just outside the 100K battery warranty, new error codes being triggered by the dealer, and the indication of cold weather influence might enable at least partial support.

Given the trade in value of the car is about $10,000, a $10,000 repair doesn’t make much sense.

After reviewing the case, given my diagnostic report did not show the new error codes that were triggered by the first diagnostic, and that the dealer was unresponsive to my inquiries about the new codes, Honda recommended that I obtain a second diagnostic from another Honda dealer at my own expense.

Second Diagnostic (different Honda dealer)

I brought the vehicle to a second Honda dealership and paid for another diagnostic inspection. The results again pointed toward HV battery deterioration and the recommended repair remained full battery pack replacement.

The dealer recorded additional codes:
  • U0296 – Lost communication with battery charge control module
  • P0AE1 – Pre-charge contactor circuit issue
I submitted the second diagnostic documentation to Honda Customer Care as requested.

I waited a little over three weeks. During the second week, Customer Care notified me by email that they were closing the case because they hadn’t received any contact from me. I called and nicely reminded them they have the information, and I am waiting for a response.

Customer Care Case Manager Response

After just over three weeks Customer Care called and left a voice message. I called, left a message the same day. I didn’t receive a call back, so two days later I called again and left another message and sent a follow-up email on the case. Then, received a call later that day.

Customer Care simply stated they had reviewed the case, and that no assistance would be provided.

Doing some research, my perception going in is that you might need to elevate the case in order to get the right eyes on the issue, so I asked for a supervisory review. The case manager stated a supervisor would call within 24 hours.

Supervisor Response

The supervisor called, and again stated that no assistance would be provided. I asked if he could share any reasoning and his response was that the vehicle is well outside its warranty expiration in 2021 and that the case was reviewed and that no assistance would be provided.

I clarified that the battery warranty is 10 years 10,000 miles, and that the warranty did not expire in 2021, rather the car first exhibited issues only a few thousand miles outside of the 100K warranty.

He responded that Honda had reviewed the case and no assistance would be provided.

I noted that the diagnostic caused new errors, and that the vehicle is significantly less drivable than it was before the diagnostic. He stated that the dealers are independently owned and operated, Honda does not have the ability to assist, and thus no assistance will be provided.

And finally I asked, with all that being said, does it matter at all that we’re a Honda-only family, and this lack of any support will drastically change my perception of the Honda brand. Again, he stated the vehicle is out of warranty and no assistance will be provided.

Dealer Escalation

As a last resort, I talked to a Sales Manager at the dealership where I obtained the second diagnostic hoping there might be an escalation path from their standpoint. He spoke with the Service Manager and the GM, and the consensus was that once Honda corporate declines goodwill assistance after review, the dealership will not get a different result.

I asked if the dealership could help with either resolving the issue, or dispositioning the vehicle in a reasonable manner. The dealership stated that of course the service department could look at the problem but would have to charge standard rates. A trade-in offer of $250 would be available. And/or they would help ensure a good price on a new vehicle.

What I Was Hoping For

Certainly I did not expect Honda to cover the full cost of a battery replacement or anything more costly than that. It wouldn’t be fair to have a brand new battery for no cost. So, I think my best case outcome was that Honda might have these battery packs in a warehouse somewhere not being used. Honda would supply the battery pack at no charge, I would pay the dealer the $2,000 in repair labor, I’m out $2,000 instead of $10,000, the dealer makes money, Honda keeps a loyal household, and everyone wins.

Also, I suppose I was hoping for some sort of empathy. The lack of support of any kind from Customer Care was disheartening. Like a family member turning a cold shoulder.

What Now

I’m sad. I’m sad because the $10,000 loss is painful with a tight family budget. And really, I’m even more sad because Honda has been a part of my life for 20+ years. My kids have grown up in these cars. It’s like breaking up after a long relationship.

Why I'm Sharing

I’m sharing this because:
  • This experience might help another Honda Clarity owner
  • This might influence someone “on the fence” about buying a hybrid or EV, especially if they have the expectation (that I had) that Hondas will run 200K+ miles
  • Someone in the forum might have suggestions for me what to do next
If anyone has suggestions I would appreciate it. I am not sure how long the car will limp along. I am considering independent hybrid repair options but am concerned about throwing away more money. I feel like the car should be worth significantly more than $250 in its current condition considering part value, yet I understand no driver wants to buy a vehicle with a failing battery. Also if there is a way to fix what the diagnostic broke, as the car drove much better prior to the diagnostic.

Thanks for reading,
Andy
i just mine and i paid $0 out of pocket for those codes and i live in California which is 10 year or 150k miles and I was at 111k miles and they just did mine today
 
i just mine and i paid $0 out of pocket for those codes and i live in California which is 10 year or 150k miles and I was at 111k miles and they just did mine today
Yep, I may have kept my Clarity if it had the 150K battery warranty, but I sold mine right before the bumper to bumper warranty expired. But I knew I wanted a pure EV as soon as I bought my Clarity. I also sold my first Tesla right before the bumper to bumper warranty expired too. lol. I have another two years of full warranty on my second Tesla. I'm not sure what I will do when that time comes. Frankly I don't trust any automobile manufacturer, but I think the OP had unreasonable expectations since his car was out warranty. Hope you get another 111K miles.
 
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