The car we see more than any other. We test before we quote, and we tell you when it isn't the battery.
6,330 Prius repair orders since October 2014.
Pick a generation for what it is known for and what we fix most on it.
313
Prius repair orders since October 2014, model years 2001 to 2003
The original, and mostly a collector's car now. Its hybrid parts swap with nothing newer, and they are getting scarce.
3,915
Prius repair orders since October 2014, model years 2004 to 2009
The Prius we see most by a wide margin, and the cheap used car we tell friends to buy. The engine is nearly bulletproof; the parts around it are not.
1,922
Prius repair orders since October 2014, model years 2010 to 2015
Better than the Gen 2 in almost every way, with one problem to understand before you buy: the head gasket.
180
Prius repair orders since October 2014, model years 2016 to 2022
Solid so far, and still young enough that it has not shown us all its patterns.
None yet
Prius repair orders since October 2014 on a system we track, model years 2023 on
Too new for a pattern in our bays. A 2.0-litre engine, nearly twice the power, and a lithium-ion pack in every grade.
None on a system we track yet.
Repair orders since October 2014 that touched a system we track, counted once each, from our Shop-Ware records. Prius liftback and plug-in models by model year; the Prius v and Prius c are counted separately.
In the words people use when they text us, with what we usually find. The counts are our own repair orders.
The small 12V battery in the back, not the hybrid pack. It is the most common false alarm we see, and we test it before anyone mentions the big battery.
“Nine times out of ten, this is the little 12V battery, and it's one of the cheapest parts on the car.”
2,925 Prius repair orders since October 2014 touched the 12V battery or body electrics.The 12V battery, explained
On a 2004-2009 Prius, check the oil before anything else. These engines burn oil without leaking it, there is no oil light, and the triangle is the only warning. If it flickers in corners, stop driving.
On a Gen 2, usually the inverter coolant pump. The inverter overheats, the car stops charging its 12V, and the battery light follows. Let it cool, get it home, then get it fixed.
“Confirming real flow is the difference between fixing it once and chasing it twice.”
P0A93 is on 148 Prius repair orders since October 2014; the inverter, on 1,192.P0A93, explained
On a 2010-2015 Prius, the head gasket until we prove otherwise, often after a tired water pump. On a 2016-2019, look at the exhaust heat exchanger first. Don't keep topping it up and driving.
1,381 Prius repair orders since October 2014 touched the cooling system.Gen 3 head gaskets
The brake actuator's pump and accumulator wearing out. The pedal can go hard and stopping distances grow, so this is not one to put off.
The actuator codes C1391, C1252, C1253 or C1256 are noted on 17 Prius repair orders since October 2014.The brake actuator, by generation
Sometimes it is the battery. Often it is the 12V, an inverter fault, cooling or a sensor. We read the codes and test before anyone agrees to anything.
“One of our customers came in ready for a $3,900 battery replacement and drove away with a free warranty repair from Toyota instead.”
992 Prius repair orders since October 2014 touched the hybrid battery.Why it isn't always the battery
Type what the scanner gave you, or pick one of the codes we see most.
P1121
148 repair orders since October 2014
On a 2004-2009 Prius, the three-way valve in the coolant heat storage system has failed. It usually arrives with P1116, and the fix is the valve.
Nine codes, three problems: a 2006 PriusP0A93
148 repair orders since October 2014
On a 2004-2009 Prius it is usually the inverter coolant pump. Mostly a hot-day problem: let the car cool, get it home, then get it fixed.
P0A93, explainedP0A80
28 repair orders since October 2014
This one usually does mean the pack. We still separate the 12V codes from the high-voltage ones first, because a weak 12V can make a new pack look faulty.
P0A80, explainedC1391
20 repair orders since October 2014
The brake actuator's pump and accumulator wearing out, mostly on a 2010-2015 Prius or Prius v. ABS, brake and traction lights come on together.
The brake actuator, by generationC1256
18 repair orders since October 2014
The same brake actuator, losing pressure. The pump buzzes longer and more often after you park, and the pedal can go hard. Do not put it off.
The brake actuator, by generationP0AA6
13 repair orders since October 2014
High voltage leaking to the body. Despite the name, we often find it in the transaxle, the A/C compressor or water that got in, not the battery.
P0AA6, explainedP1116
11 repair orders since October 2014
It travels with P1121 on a 2004-2009 Prius, and points at the same failed three-way valve.
Nine codes, three problems: a 2006 PriusP3000
6 repair orders since October 2014
On the 2006 Prius we wrote up, it came with P0A80 and a failed block inside the pack, alongside two problems that had nothing to do with it.
Nine codes, three problems: a 2006 PriusP148F
4 repair orders since October 2014
The electric water pump spinning without moving coolant, because coolant is missing. On a 2010-2015 Prius we test for a head gasket before anything else. Stop driving.
P148F00, explainedP0441
4 repair orders since October 2014
Usually a loose, missing or aftermarket gas cap, often with P0455. The car drives fine, but any check engine light fails Oregon DEQ.
P0441 and P0455, explainedCounts are distinct repair orders since October 2014 whose Shop-Ware records note the code. Not every order notes one, so they undercount.
Cost depends on the generation and the specific failure, so we give you a real number after we diagnose it, not a guess over the phone. We install new hybrid batteries only, never reconditioned or used cells. Plenty of warning lights that look like battery failure turn out to be something simpler and cheaper, which is why we always test first.
Common signs include the red triangle warning light, reduced fuel economy, the gas engine running more than usual, and a noticeable drop in power. We use Toyota Techstream diagnostics to test individual cell voltages and capacity rather than guessing, so we can tell you exactly what is happening before recommending any repairs.
Most Toyota Prius hybrid batteries last 150,000 to 200,000 miles or 10 to 15 years. Portland's mild climate helps battery longevity compared to extreme heat states.
The Gen 2 (2004-2009). It has the simplest, most proven version of the hybrid system, a nearly bulletproof 1.5L engine, and two decades of real-world data backing it up. The Gen 4 (2016-2022) looks promising but hasn't aged enough for us to know its full story.
Head gasket failure on the Gen 3 (2010-2015) is the most expensive, and the cost varies widely with the damage. Hybrid battery replacement comes next, then ABS brake actuator replacement, which varies by generation. Everything else is among the cheapest maintenance of any car we service.
A text with a photo of the dash gets you an answer fastest. Booking online holds a day and a time.
