I have the Grand Highlander hybrid max limited and am averaging around 23 mpg for daily driving. The gas tank max capacity is supposed to be 17 gallons but I am only able to put in a max of 12.5 gallons once the low fuel light comes on. Is there a large reserve tank and do I have an extra 4.5 gallons of range left when the low fuel warning light comes on? Please let me know how many gallons you are able to put into your tank once the low fuel light comes on (I still had 19 miles of range left once the low fuel light came on). Thanks!
Fuel Tank capacity issue
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Grandmart
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That's interesting that they'll be replacing the parts instead of some calibration. Will wait for your update to see how that has helped. Thanks!
Agreed. The only other thing I'll caution you on is that even though what you said is right as far as we know (getting the ~17.2 gallon full tank capacity), there was one owner who said that his car shut off after driving ~50ish miles past 0 DTE. I'm not sure if that's something that was an anomaly... or if that would happen to everyone / most people... and I couldn't get a good answer as to whether he actually ran out of gas or if the car went into some premature self-preservation mode early to protect itself from actually running out of gas... but I just wanted you to be aware that there was one report of that happening, even though we assumed he might actually still have some gas left in the tank.
What do you mean by they "found the fix?" Do you mean that they are willing to try replacing those parts to see if that helps? Have they already tried that with success on other GHs prior to yours? How would they know that it would 100% be a fix if they are just replacing those parts with the same part numbers? Appreciate you sharing this with us... just curious for more background. Good luck!
No. It was a TSB when they searched the issue within Toyota
Really? I went to the dealer to report the issue for mine on Monday of this week (12/18) and the only thing that showed up (which I alerted them of during my visit) was that Tech Tip (T-TT-0742-23) about taking fuel capacity and DTE measurements and reporting it to Toyota... no TSBs or "fixes." Could you please share the code for the TSB that they found? Thanks.
Wow, that'd be a bummer for sure then. If the car shuts off (regardless of the reason) even with 5 gallons of fuel in the tank, there's no point of having those 5 gallons. That's an awful lot of fuel being wasted. Let's hope that's not the case for all of us.
Since he went ~50 miles past 0 DTE, I'd think he either actually ran out of gas, or only had a little bit of fuel left when the car shut off... but certainly not a scientific situation with the lack of specifics available for what actually happened.
We’ve had our Hybrid Max Platinum for about a month now. It’s my wife’s DD but while I’ve driven it a few times and end up filling it, I’ve noticed this issue. Did a little research and found this forum (I’m a Tundra and Tacoma world member as well). I’m going to get ours in soon to report the issue. I managed to pump just a hair over 12 gal. and we are experiencing very low MPG (20ish) based on the computer. Next fill up I’m going to do my own calculation to see.
Sub’d for more info.
Sub’d for more info.
I started this thread and am happy to report that the dealer informed me that Toyota is aware of this problem. The dealer needed to keep my car for a day to diagnose and speak to Toyota. They are going to replace the fuel pump, fuel tank and some hoses. Take your vehicle to the dealer and report the issues you are having with the limited amount of fuel that you are able to put into the tank and you should get the same fix for the problem. I will let you know once the repair is done and if it fixed the issue.
Thanks for the info @Grandmart. Do you know what the dealer did as part of the diagnoses? Did they've to pull apart anything or was it more of filling up gas and taking some measurements? My dealer told me they'd have to take things apart which is making me a bit hesitant. Will wait to hear if replacing the parts fixed the issue or not.
I have been following this thread and I do have the issue as well. I have a Hybrid Max Platinum delivered in July. The low fuel light went on at 301 miles. I had previously put in 10.2 gallons for a full tank. I calculated that I should be able to get to 400 miles comfortably at 25-27 average MPG, which is an additional 100 miles from when the light went on. I didn't have the courage the first time to take it all the way to 400, but I did fill up the tank on the slowest setting today at 53 miles from when the low fuel light went on. I put in 13.66 gallons. I am interested to see where this issue goes and the results from others who have engaged Toyota on this issue. It does seem from many fill ups like the calibration with the fuel measuring that should be around 2.5 gallons remaining is chiming off early by around 3 gallons.
Dealer performed an evap test and looked for damage to the fuel tank. The fuel tank and the fuel pump assembly are currently on back order (others must be getting this done too). Notify the dealer of your problem and have them contact Toyota.
Do you have a traditional gas grand Highlander? I had 10 miles until empty. I filled up to 14 gal and that was over filling it. It gave me 298 miles until empty. I have never gotten it to tell me more than 304 until empty. I’m super disappointed on the gas mileage
I have a gas XLE. At 1/4 tank remaining I usually fill between 11.5 and 12 gallons, and the DTE indicator goes to 340-350. My average MPG according to on-board instrumentation is 22.1, and hand calculation in the Fuelly app is 21.6. I do all city stop-and-go traffic and lots of short trips under 10 miles, probably the worst for fuel economy. Since the EPA estimate for the gas engine is 21 city and 28 highway I'm right where I should be, so I'm satisfied. It's about 5 MPG higher than my 2021 Tacoma that I traded in for the GH, so I'm happy
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My dealership just notified me that my fuel tank has arrived and is ready for replacement, but from everyone who's had that done already, they all say that did not fit the issue. It really makes me hesitant to go through with this replacement. Should I bring it in for fuel tank replacement anyway?
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I have not heard anyone who's gotten the tank replaced said it fixed the issue, curious to what your deanship will say, sorry about the bad news.
I would let them do it. If you refuse the "fix" they have they aren't going to look any further until you have that done and it doesn't fix the problem. Hope that makes sense.
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yes that makes sense, hopefully that goes through smoothly without adding any problems. I have heard someone said that the tank design was found to be defective from the tanks Toyota collected from owners who had gone through this replacement because of the way it's shaped that some gallons of gas is not usable, not sure if that's fully true. That's why the tank replacement didn't make a difference because it's still the same tank design.
I have some more data to report on this issue after traveling during the holidays with multiple fill-ups. I'll post a comprehensive chart of all my data below. During one of my fill-ups, I used a super slow pump that trickled in like ~1 gallon per minute, so the fuel was barely coming out at a slow pace even with the pump at the fastest setting. That allowed ~14 gallons to pump in when my previous best was under 12 gallons. I took that info and decided last night to manually pump at the slowest the pump could manage (I didn't use the detents on the handle - I just manually squeezed the pump until gas trickled out)... and I got in ~16 gallons before the pump clicked off! So, while I have been assuming this whole time that I have been getting a full tank (because the fuel gauge reaches Full), but the actual reserve was substantially higher than stated (~4 gallons instead of ~2 gallons) not allowing me to access the full capacity... now I'm thinking I wasn't actually getting a full tank, but the gas was backing up in the tank / filler neck when refueling due to a poor design not being able to accept that much fuel a normal pace of refilling... and then when it finally settles in the tank, I likely could have put in another ~3-4 gallons. I'll be reporting this to my dealer next week once my Service Manager returns from the holidays.
For context, my wife gets about ~21MPG and I get about ~25MPG on average. She's the primary driver. I drove nearly all of the road trip over the holidays.
2024 Grand Highlander Hybrid MAX Platinum - Manufacture Date: 10/2023
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For context, my wife gets about ~21MPG and I get about ~25MPG on average. She's the primary driver. I drove nearly all of the road trip over the holidays.
2024 Grand Highlander Hybrid MAX Platinum - Manufacture Date: 10/2023
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