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 Service Bulletin No. T-SB-0012-13 is obsolete and any printed versions should be discarded.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 ↗2016 Toyota Prius powertrain problems
moderate Owners of the 2016 Toyota Prius have filed 14 NHTSA complaints about the powertrain 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 →
Complaints
14
Recalls
0
Avg fix
$2,500
| Model year | powertrain complaints |
|---|---|
| 2012 Prius | 30 |
| 2013 Prius | 13 |
| 2014 Prius | 7 |
| 2015 Prius | 13 |
| 2016 Prius (this page) | 14 |
| 2017 Prius | 4 |
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.
Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2016 Prius powertrain complaints cluster around a recurring no-acceleration condition tied to warm or hot weather (above 90–100°F). Owners describe the engine revving normally while the vehicle refuses to move, a problem that vanishes after restarting the car but carries serious risk: owners have been stranded in intersections and on highways, unable to cross traffic safely. No warning lights appear, and Toyota dealerships cannot generate diagnostic codes to pinpoint the root cause, leaving the issue unresolved even after software updates.
Related thermal issues surface when the battery cooling fan runs—the car jerks from stops and becomes sluggish, capped below 40 mph. Some owners report rapid battery drain followed by complete power loss, immobilizing the vehicle mid-drive.
CV joint problems also appear: one owner describes loud clicking from the driver-side wheel during braking (Toyota issued TSB T-SB-0157-18 for this in 2018), and another reports actual joint disconnection while driving. A coolant system failure (exhaust heat exchanger leak, TSB T-SB-0135-19) drains the reservoir repeatedly and triggers overheating warnings.
Secondary issues include stalling at traffic lights, violent shaking attributed to pump failure, and anomalous power delivery to the wheels while parked in Drive with brakes applied—raising concern about unintended motion or brake system interaction.
Same Toyota Prius powertrain reports on nearby years: 2013 · 2015
Failure modes owners describe
Loss of acceleration / no-power condition on demand
Engine revs but vehicle does not accelerate when pressing the accelerator pedal from a stop or during driving. Occurs in warm/summer months (above 90-100°F). Engine continues running with no warning lights or diagnostic codes. Some owners report having to turn the car off and restart to regain power. One owner experienced a complete power loss that stranded them on a highway, requiring restart cycles before power returned.
When: Summer months, temperatures above 90-100°F, typically when accelerating from stop
Symptoms owners cite: Engine revs but vehicle does not move; No acceleration response despite pressing pedal to floor; Vehicle jerks forward minimally or not at all; No warning lights or check engine lights; Requires vehicle restart to restore power; Can strand driver in traffic or on highway
Repairs/costs cited: Toyota dealerships unable to diagnose; no fault codes generated. One owner reports software update performed with no resolution.
Recalls/TSBs owners mention: One owner notes a recall exists on other Priuses for this issue and believes it warrants investigation on 2016 models.
Battery depletion and power loss during driving
Hybrid battery depletes rapidly during normal driving. As battery depletes, vehicle loses acceleration power progressively until complete power loss occurs. No EV mode indicator despite coasting and braking. Vehicle becomes immobilized on roadway.
When: During driving, battery depletion occurs over 8-10 miles of driving
Symptoms owners cite: Battery indicator drops from full to nearly empty in 8.6 miles; Progressive loss of acceleration power; Engine hesitation and power surges; Complete power loss / engine shutdown; Faint grinding noise from powertrain; Vehicle immobilized despite being in Drive
Repairs/costs cited: No check engine light present; owner had to manually push vehicle off roadway.
Clicking noise from front left wheel area on braking
Loud clicking noise from driver-side front wheel area during braking, suggesting CV joint/axle issue. Noise disappears when shifted to Neutral. Owner reports this is a known problem among Gen4 Prius owners with Toyota TSB issued.
When: Upon braking, noise present continuously over past year
Symptoms owners cite: Loud clicking noise from front left wheel area; Noise occurs only during braking; Noise disappears in Neutral
Repairs/costs cited: Owner states repair has been covered out of warranty for other owners but dealership and Toyota corporate declined to address.
Recalls/TSBs owners mention: Toyota issued TSB T-SB-0157-18 (NHTSA No. 10153229) for this issue in December 2018. Owner reports other Gen4 Prius owners had repair covered out of warranty by Toyota.
Acceleration sluggishness and jerking when battery cooling fan runs
When battery cooling fan activates (typically in temperatures above 90°F), vehicle exhibits slow acceleration or complete loss of acceleration. At stops, vehicle jerks forward instead of accelerating smoothly. Vehicle must be turned off and restarted to regain normal power. Braking/speed reduction becomes sluggish; unable to exceed 40 mph.
When: During warm/hot weather (above 90°F), when battery cooling fan is active
Symptoms owners cite: Slow acceleration or no acceleration when fan is running; Jerking forward from stop instead of smooth acceleration; Sluggish braking response; Unable to reach normal speeds (capped at 40 mph); No warning lights present; Requires engine restart to restore function
Repairs/costs cited: Dealership unable to recreate issue and found nothing during scheduled maintenance inspection.
CV axle/joint failure
Two separate reports of CV joint problems: one of loud clicking during braking (narrative #2) and one of actual joint disconnection while driving. Joint disconnection occurred in city traffic while vehicle was in motion.
When: Clicking present over past year; disconnection occurred in motion
Symptoms owners cite: Loud clicking from driver-side wheel; Axle joint disconnection while driving
Repairs/costs cited: One owner states other Prius owners had Toyota cover repair out of warranty.
Recalls/TSBs owners mention: TSB T-SB-0157-18 issued December 2018 for CV joint clicking.
Forward creep in Park when engine starts to charge battery
Vehicle sends power to wheels and creeps forward slightly when gas engine engages to charge hybrid battery while parked. Occurs with vehicle in Park gear, parking brake applied, on flat surface. Owner hears brake creaking as engine engages. Raises concern about parking brake failure interaction.
When: When battery depleted and gas engine turns on to charge battery while parked
Symptoms owners cite: Vehicle creeps forward in Park; Slight forward motion for 1-2 seconds when engine engages; Brake creaking/groaning sound; Power felt at wheels despite Park engaged
Power engagement when brakes applied on uphill incline
Vehicle sends electrical power to motor and wheels even when brakes are applied while stationary on uphill driveway. Does not occur on flat ground or downhill. Dealership claims this is normal hill-assist feature, but owner states hill-assist uses brakes, not motor. Behavior began suddenly two weeks prior to complaint and differs from prior operation.
When: When parked in Drive on uphill incline with brakes applied
Symptoms owners cite: Electrical power sent to motor and wheels while brakes applied; Power engagement only on uphill facing driveway; Does not occur on flat or downhill; Recent onset (two weeks prior)
Recalls/TSBs owners mention: Dealership claimed normal hill-assist operation but found no error codes; refused further investigation.
Coolant system failure / exhaust heat exchanger leak
Coolant reservoir leaks down repeatedly over multiple days. Shop diagnosed failed exhaust heat exchanger leaking coolant. Overheating light flashed during driving.
When: Over multiple days; initial incident at 80k+ miles, vehicle less than 96 months old
Symptoms owners cite: Overheating light flashing while driving; Coolant reservoir empty; Coolant drains repeatedly despite refilling; Exhaust heat exchanger failure
Repairs/costs cited: Shop found exhaust heat exchanger failure requiring replacement.
Recalls/TSBs owners mention: Toyota TSB T-SB-0135-19 covers this issue. Owner notes warranty coverage differs by state: federal warranty covers repair under 96 months/150k miles in California but owner's state has lower mileage threshold, leaving repair out of warranty.
Engine stalling at traffic lights
Vehicle stalls for 5-10 seconds when stopped at red lights. Happens sporadically and is difficult to reproduce. Owner found similar complaints on online forums.
When: Sporadically when stopped at traffic lights
Symptoms owners cite: Engine stalls for 5-10 seconds; Occurs at traffic lights; Difficult to reproduce
Violent shaking / water pump or coolant pump failure
Vehicle experienced violent shaking on freeway, attributed by owner to water pump failure or coolant invertor pump overheating. Owner believes this is a known Toyota issue but dealership could not recreate problem.
When: While driving on freeway
Symptoms owners cite: Violent shaking while driving; Suspected water pump or coolant pump failure
Repairs/costs cited: Dealership could not recreate issue.
Recalls/TSBs owners mention: Owner believes Toyota is aware of this as a known issue.
Synthesized from 14 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 0 most recent
Had powertrain trouble with your 2016 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 2016 Toyota Prius?
It's a documented issue but not catastrophic. 14 complaints have been filed. Repairs average $2,500 and most owners catch it before it causes a breakdown.
At what mileage does the powertrain typically fail?
Based on the 14 complaints filed, powertrain issues most often appear around 28,571 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
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/2016/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.