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How to fix a $4,000 hybrid battery problem with vinegar and baking soda

This is one of those 'Don't try this at home if you don't know what you're doing' DIY tales. Two weeks after imgur user "scoodidabop" bought a used Toyota Camry Hybrid with no warranty, he got the Christmas Tree dash display with warnings like "Check VSC System," "Check Hybrid System," and the Check Engine light. After some Internet sleuthing he figured it could be a faulty brake actuator, assuming the hybrid system warning was a false alarm. But it wasn't the actuator, it was the battery, a Toyota dealer telling him that his battery had "gone bad," and he'd need $4,457 to replace it. Then he had a brainstorm: it could be one of the cells that's gone bad, not the whole battery. Scoodidabop has some experience as an electrician, so he figured he could test it and replace any bad cells for about $45 apiece. He removed the battery unit from the trunk and over the course of two hours tested all 68 cells four times. He found nothing wrong. So he devised another type of test and checked every cell again. He couldn't find a problem with any of them. Turns out the problem wasn't in the cells, but with the dirty and corroded copper connectors at the ends of the high-voltage cables. He pulled the 34 connectors and their steel nuts, soaked them in vinegar, gave them a light steel wool scrub, soaked them in baking soda and water to counteract the vinegar, applied an anticorrosive and reinstalled them. That took an hour. When he replaced the battery, the warning lights had all gone out and the battery worked perfectly. Skill level: experience. Cost: less than $10. Perhaps it's time for hybrids to be able to test their own cells individually. Dealers, too.

Does the Toyota Prius still matter?

Toyota remains incredibly proud of its green halo car, the Prius. On the company website, it calls the gas-electric car, "The hybrid that started it all." Chances are, if someone tells you to think of a hybrid car today, your first thought is going to be the Prius. Now a cultural icon, the Prius changed a lot of attitudes about what an efficient car is able to achieve. But the car is aging, despite numerous refreshes and model tweaks over the years, and sales dropped 11.5 percent last year. It's taken Toyota 25 years of ups and downs to get the Prius to where it is today, and we started wondering if that's too long for the car to remain viable in an era of 40+ mile-per-gallon non-hybrid cars and a plethora of plug-in competitors for the green car crown (we're not the only ones). Plus, Toyota is rapidly shifting its green focus away from the Prius and towards the hydrogen-powered Mirai fuel cell car. But if you ask Toyota representatives if the Prius is still a vital car in 2015 – and we did – you'll find that there's still a lot of love for the car that went before. For example, Geri Yoza is a Toyota national manager who spent years traveling all across the US teaching people about the Prius. The veteran of countless customer education sessions told AutoblogGreen that it took a long time for the Prius to "cross the technology chasm," and that it wasn't until about a decade after launch that the car became a common sight outside of the initial popularity hotspots. "It takes a while for people to become confident in the technology, to understand that it's been proven," she said. Now that the hybrid is ensconced in the public mind, it's time for the next step. "I think the Prius, the whole idea 'to go before,' was to go before the Mirai." Part of that precursor status is due to the fact that a lot of the Prius' powertrain technology has made the jump to the Mirai. When we asked Bob Carter, Toyota's senior vice president of automotive operations, if the Prius still matters, he had a clear answer: "My goodness, yes." "We've been selling hybrids for 25 years," he said, "but when you go back, we had said that the Prius and hybrid technology were a bridge to the future and we were very clear that it's going to be a very long bridge. Essentially, and I'm not an engineer, the Mirai takes the technology from the Prius and takes the ICE engine out and puts a fuel cell stack in.

Hybrid, Plug-in Hybrid and EV Buyer's Guide: Which one do you want?

If you're shopping for a new vehicle these days, there's a litany of acronyms, buzzwords, and technobabble to further complicate an already difficult decision. But if you're looking at a green powertrain, you have three basic choices to compare: hybrid, plug-in hybrid and "EV" or, electric vehicle. So what are they and which one — if any — is right for you? Research your next new vehicle using Autoblog's Car Finder. Gasoline-Electric Hybrids By now, most people are familiar with the concept of a hybrid car. Thank Toyota's Prius for that. At its most basic, a hybrid vehicle has two powertrains, one gasoline and one electric, which work together for maximum efficiency. At low speeds, the engine can shut off entirely, relying solely on the battery for propulsion. The battery is either charged as you drive by converting kinetic energy into potential energy via a complex regenerative braking system, or directly off of the gas motor. This is a very hands-off, behind-the-scenes system as all the driver has to is put in gas and drive as normal. Hybrids come in all shapes and sizes and, according to the EPA, range in fuel economy from 58 mpg for the Hyundai Ioniq Blue all the way down to 13 mpg for the Ferrari LaFerrari Aperta. Best For: Anyone who want to see their fuel consumption go down without many sacrifices. You can easily find a hybrid sedan, hatchback, crossover, SUV or even a pickup truck (i f you can find one). Best of all, a hybrid requires no special equipment to be installed at home, or added work for the driver. Hybrids do cost more than traditionally-powered competitors, so make sure to compare projected fuel savings with how much extra a hybrid will cost – it may take a surprisingly long time to break even. The EPA provides a handy calculator for this very purpose. Our Favorite Hybrids: 2017 Toyota Prius 2018 Hyundai Ioniq Hybrid 2017 Ford Fusion Hybrid Plug-In Hybrids Sometimes referred to as a PHEV, or plug-in hybrid electric vehicle, this is a baby-step towards full electrification. Armed with a much larger battery pack than a hybrid, PHEVs can go between 12 ( Mercedes-Benz GLE550e) and 97 ( BMW i3 w/Range Extender) miles on electricity alone depending on the model and your driving style. Like a normal hybrid, the driver is largely unaware of which power source is currently in use, even as they switch over — either because the battery is drained, or the driving circumstances require more power.