DP: The Customer Confidence Program is a component of a class action settlement that includes several elements of coverage. The Customer Confidence Program provides coverage as it applies to the Intelligent Power Module (IPM). The specific condition covered by this Customer Confidence Program 23TE03 is failure of the IPM located inside the inverter assembly of the hybrid system indicated by DTCs P0A94, P0A1A, P324E, and/or P3004. If any of these DTCs are detected, various warning lamps on the instrument panel will also illuminate and the vehicle will enter Fail Safe Mode.
full bulletin at NHTSA ↗2015 Toyota Prius powertrain problems
severe Owners of the 2015 Toyota Prius have filed 13 NHTSA complaints about the powertrain, typically surfacing around 22,267 miles at roughly $2,500 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See powertrain across all vehicles →
Failure mileage
Complaints
13
Recalls
0
Avg fix
$2,500
| Model year | powertrain complaints |
|---|---|
| 2011 Prius | 18 |
| 2012 Prius | 30 |
| 2013 Prius | 13 |
| 2014 Prius | 7 |
| 2015 Prius (this page) | 13 |
| 2016 Prius | 14 |
| 2017 Prius | 4 |
4crashes
3injuries
When does it fail?
Of the 13 powertrain complaints filed for the 2015 Toyota Prius, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
No new NHTSA powertrain complaint has been filed on this vehicle in over 10 years — the issue may be aging out of the active population.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering powertrain on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
TSB: REVISION NOTICE July 01, 2019 Rev2: ? Applicability has been updated to 2019 ? 2020 model year Toyota vehicles. ? The Techstream Preparation and Process Overview sections have been updated. October 30, 2017 Rev1: ? Applicability has been updated to include 2018 model year vehicles. Any previous printed versions of this bulletin should be discarded. SUPERSESSION NOTICE The information contained in this bulletin supersedes SB No. T-SB-0012-13. Service Bulletin No. T-SB-0012-13 is obsolete and any printed versions should be discarded. Be sure to review the entire content of this bulletin before proceeding. Flash reprogramming allows the Electronic Control Unit (ECU) software to be updated
full bulletin at NHTSA ↗Warranty Policy Bulletin: Toyota has received reports of customer concerns in which the vehicle may exhibit a brief intermittent shudder during torque converter flex lock up. This shudder may be observed while driving under light throttle conditions between approximately 25-50 mph.
full bulletin at NHTSA ↗TSB: Some 2013 ? 2015 Prius PHV, Prius and 2013 ? 2016 Prius V vehicles may exhibit a vibration due to rough idle and/or tapping noise from the HV transaxle at cold start. The check engine light may also illuminate with (DTC) P0300, P0301, P0302, P0303, P0304 (Random/Multiple Cylinder Misfire Detected). The Engine Control Module/ECM (SAE Term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of this condition occurring. Follow the Repair Procedure in this bulletin to address this condition.
full bulletin at NHTSA ↗TSB: World Standard (WS) Automatic Transmission Fluid (ATF) was introduced to reduce maintenance costs and increase the mileage between scheduled maintenance checks. Here are some important tips when working with ATF-WS in Toyota vehicles requiring it's use.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners describe a dangerous disconnect between the shift lever position and actual transmission engagement. The lever springs back to center regardless of whether the transmission shifted into the selected gear—owners cannot tell from lever feel alone if the car is really in Drive, Reverse, Park, or Neutral. This has caused vehicles to sit in Neutral while owners believed them in gear, leading to unexpected rollback, unintended backward motion during U-turns, and delayed response in emergency situations.
The shift mechanism is overly sensitive: a light bump or accidental contact can move the shifter out of Park, and parked vehicles have rolled backward without driver input. One owner reported $6,200 in damage after a daughter accidentally bumped the shifter and the car rolled 20 feet into a tree.
Several owners report sudden, uncontrolled acceleration on engine start or from a stopped position—vehicles accelerate despite brake pressure and shift attempts, resulting in crashes into obstacles and other vehicles. Others describe the vehicle lurching forward unexpectedly with unresponsive brakes while at traffic stops.
Hybrid system failures include grinding noises followed by stalling, sudden loss of electric power during highway driving, and inverter overheating. At 105k miles, one owner paid $2,642 for hybrid repairs Toyota said were not covered under warranty. Another owner's inverter failure was deemed outside existing recall coverage by VIN.
Same Toyota Prius powertrain reports on nearby years: 2012 · 2013 · 2016
Failure modes owners describe
Shift lever does not match transmission gear position
The shift lever springs back to center position regardless of whether the transmission actually engaged the selected gear. Driver cannot rely on lever position to confirm the car is in the intended gear; must check dashboard display. Transmission may fail to shift into the selected gear, leaving vehicle in Neutral or Park without driver awareness.
When: Occurs during normal shifting operations
Symptoms owners cite: Shift lever moves into position but transmission does not engage gear; Lever springs back to center whether transmission is in gear or not; Vehicle does not move when accelerator pressed after shifting; Driver must check instrument panel to confirm actual gear; Vehicle rolls backward unexpectedly when driver believes shift into Drive failed
Unintended shift out of Park due to light shifter actuation
Shift lever can move from Park to Neutral with minimal contact or accidental bump. No mechanical detent or button lock prevents unintended shifting. Parked vehicle can roll when shifter is accidentally engaged.
When: While vehicle is stationary and parked, with engine off or electrical system on
Symptoms owners cite: Vehicle rolls backward after accidental bumping of shifter; Parked car shifts from Park into Neutral without deliberate action; Minimal force required to move shifter out of Park; Vehicle rolls significant distance (20 feet reported) before striking obstacle
Repairs/costs cited: $6,200 damage to rear of vehicle reported from rolling into tree
Unintended acceleration upon engine start
Vehicle accelerates at high speed immediately after pressing start button while foot is on brake pedal. Engine races uncontrollably. Brake pedal does not slow the vehicle. Shifting into Neutral or Park does not stop acceleration.
When: Upon initial engine startup from parked position
Symptoms owners cite: Engine races loudly immediately after start button pressed; Vehicle accelerates at high speed despite foot on brake; Braking does not slow vehicle; Shifting to Neutral and Park does not reduce speed; Vehicle crashes into fixed object (stone wall, tree)
Repairs/costs cited: Vehicle wedged between wall and tree; interior lights non-functional after collision
Vehicle lurches forward and unresponsive braking
Vehicle lurches forward suddenly at a stop. Brake pedal becomes unresponsive when driver applies braking force to stop. Vehicle strikes another vehicle and goes into ditch.
When: While stopped at traffic light or intersection
Symptoms owners cite: Vehicle lurches forward unexpectedly; Brake pedal unresponsive to driver input; No warning lights or messages on dashboard; Vehicle strikes another vehicle and enters ditch; Passenger and driver injured
Repairs/costs cited: Vehicle totaled; passenger and driver injured
Shift lever jumps from selected gear to Neutral
Shift lever automatically moves to Neutral position when driver shifts to Drive (D) from Park (P). Vehicle cannot shift into Park afterward. Problem may clear after waiting and turning off and restarting engine, but issue recurs intermittently.
When: While stopped at traffic light
Symptoms owners cite: Shift lever jumps from Drive to Neutral involuntarily; Cannot shift to Park; Problem may resolve temporarily after engine restart; Driver feels unsafe operating vehicle; Police assistance required at traffic light
Repairs/costs cited: Towed by roadside assistance; problem resolved temporarily after ~10-15 minutes
Grinding and screeching noises with stalling
Grinding and screeching noises originate from engine area after highway driving. Vehicle idles but noise persists. Vehicle eventually stalls on highway and will not restart. Error message indicates hybrid system error.
When: After 125-mile highway drive; stalling occurred on return trip
Symptoms owners cite: Grinding and screeching noises under hood while idling; Noises audible after engine is parked and running; Vehicle stalls on highway; Engine will not turn back on; Error message references hybrid system error
Codes mentioned: Hybrid system error
Repairs/costs cited: Vehicle pushed off highway; not restarted by owner
Unintended acceleration from Park position
Vehicle accelerates forward on its own while unoccupied, with gear shifter in Park position and engine on. Vehicle crashes into fixed object. Airbags do not deploy.
When: While vehicle parked and unoccupied with engine on
Symptoms owners cite: Vehicle accelerates forward without driver input; Occurs from Park gear position; Vehicle crashes into rock; Airbags fail to deploy despite collision
Repairs/costs cited: Vehicle driven home after collision; no injuries reported
Shift malfunction warning with no-start condition
Vehicle will not start. Master warning light illuminated with shift malfunction warning message on display. Buzzer sounds continuously. Indicator states error is in shift control system. Vehicle towed to dealer; no diagnostic codes found by dealer, and vehicle starts normally for dealer.
When: While vehicle parked in driveway
Symptoms owners cite: Master warning light on; Shift malfunction warning message displayed; Continuous buzzer sounding; Vehicle will not start; No diagnostic trouble codes stored
Codes mentioned: Shift control system error
Repairs/costs cited: Vehicle towed to dealer; starts normally for dealer technician; issue not replicated
Unintended backward acceleration while stopped
Vehicle accelerates backward unexpectedly while at a stop. Driver able to brake and regain control. No warning lights illuminated before or during event.
When: At a stop; attempted to accelerate forward
Symptoms owners cite: Vehicle accelerates backward unexpectedly; No warning indicators before failure; Driver able to brake and regain control
Repairs/costs cited: Taken to dealer after incident
Sudden loss of electric power and jerking while driving
Vehicle jerks suddenly and loses electric power while driving at highway speed. Car reverts to gasoline engine only and continues at severely reduced speed (10-15 mph). Hybrid system loses power delivery. At 105k miles, dealer replaced transistor kit, power plug kit, inverter, grease, gasket, and gasket—parts not covered under warranty.
When: At 105,000 miles, during highway driving
Symptoms owners cite: Sudden jerking while driving on highway at ~45 mph; Loss of electric power from hybrid system; Vehicle slows to 10-15 mph; Can only continue on gasoline engine; Loss of normal power output
Repairs/costs cited: Dealer replaced transistor kit, power plug kit, inverter, D grease, super long life cool gasket; owner charged $2,642; parts not covered under warranty
Inverter overheating and hybrid system failure
Vehicle jerks violently and loses power while driving at highway speed. Inverter burns due to overheating, causing complete hybrid system failure. Toyota evaluated and determined the inverter failure was not covered by existing recalls for that VIN.
When: While driving on highway at 65 mph
Symptoms owners cite: Violent jerking at highway speed while driving straight; Loss of power from hybrid system; Inverter overheats and burns; Complete hybrid system failure
Repairs/costs cited: Toyota evaluated failure; inverter replacement required but not covered under recall for that VIN
Recalls/TSBs owners mention: Toyota stated failure was not covered by VIN for existing recall
Synthesized from 13 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
This is an update to complaint number: 10809942. === I forgot to include this: *** besides the rolling backward problem I had, if one has a get-into-gear-and-go emergency, it is very likely that the car will not get into gear, you will not realize that, and when you step on the accelerator to go, the car will not move. Then you have to realize why it did not go and shift again. In case…
The transmission gear shift is dangerously designed. The shifter will move into a gear positions even if it transmission does not actually shift into the gear. Whenever the handle is released, it springs back to the central position, whether the transmission is in gear or not, so the driver does not know if the transmissions is actually in gear or not--or if in gear, which gear. The driver is…
Had powertrain trouble with your 2015 Toyota Prius?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the powertrain problem on the 2015 Toyota Prius?
It's a meaningful issue. 13 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $2,500.
At what mileage does the powertrain typically fail?
Across the 11 complaints that reported odometer mileage, most powertrain failures cluster between 6,000 and 89,000 miles, with the median around 22,267. A quarter of owners report trouble before 6,000; a quarter make it past 89,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to powertrain?
No active recalls currently cover powertrain issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2015/Toyota/Prius.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.