2023 Toyota 4Runner TRD Pro — need advice: DEF warning came back shortly after refill

Write down what you already tried. A second data point from another 2023 Toyota 4Runner owner helps more than a generic diagnosis. That's where I'd start. This is from a 2023 Toyota 4Runner in Atlanta. Run the total, not the monthly, before you commit. Might be overthinking it, but I'd rather overthink than overspend.

Don't overfit one forum story to your car. If it still isn't clear on the 2023 Toyota 4Runner, a specialist hour can be cheaper than another round of parts. That's where I'd start. Post the numbers (or the code) and people can get more specific. I'm keeping receipts and dates in one folder.

Owner notes beat generic advice here. On the 2023 Toyota 4Runner in Atlanta, I'd fix the thing you'll notice every day before chasing spec-sheet extras. Then you'll know the next fork. On “need advice: def warning came back shortly,” that was the fork that mattered for me. This is from a 2023 Toyota 4Runner in Atlanta. Verbal 'we'll take care of it' is not a plan. I'd rather look cautious in this thread than stuck later.

I'd keep this practical. Verify the cheap/easy branch on the 2023 Toyota 4Runner before a big repair or a big spend. I'd do that before spending real money. Post the numbers (or the code) and people can get more specific. Doing the boring step first on purpose.

I'd keep this practical. Verify the cheap/easy branch on the 2023 Toyota 4Runner before a big repair or a big spend. I'd do that before spending real money. Keep sale price, fees, and rate as three different conversations. I'll update if anything new shows up.