This TSB provides a procedure to diagnose and replace, if necessary, an automatic transmission with Incorrect Ratio DTC (transmission clutch slip in gear above limit) listed on Page 2.
full bulletin at NHTSA ↗2016 Hyundai Sonata powertrain problems
moderate Owners of the 2016 Hyundai Sonata have filed 58 NHTSA complaints about the powertrain, typically surfacing around 60,000 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
58
Recalls
0
Avg fix
$2,500
| Model year | powertrain complaints |
|---|---|
| 2012 Sonata | 93 |
| 2013 Sonata | 83 |
| 2014 Sonata | 51 |
| 2015 Sonata | 125 |
| 2016 Sonata (this page) | 58 |
| 2017 Sonata | 53 |
| 2018 Sonata | 36 |
| 2019 Sonata | 8 |
| 2020 Sonata | 23 |
1fire
When does it fail?
Of the 58 powertrain complaints filed for the 2016 Hyundai Sonata, here's the actual mileage breakdown — failures cluster heaviest at 50,000-75,000 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
Owners have filed 58 powertrain complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
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.
Hyundai has launched an anti-theft software upgrade and window decal campaign (Campaign 993), combined with an anti-theft steering wheel lock campaign (Campaign P32), in response to an increase in thefts of certain 2011-2022MY Hyundai vehicles not equipped with engine immobilizers targeted through social media. For certain vehicles that cannot be updated with the software (Campaign 993), Hyundai is offering customers steering wheel locks at the dealer (Campaign P32). This Dealer Best Practices Guide provides information to assist dealership personnel with customer questions relating to the immobilizer software upgrade, window decals and steering wheel lock ant-theft solutions available from
full bulletin at NHTSA ↗Certain vehicles (listed below) equipped with 7-speed Double Clutch Transmissions (DCT) may exhibit abnormal vibration at low speeds. This bulletin outlines the procedures for diagnosing clutch judder, updating the Transmission Control Unit (TCU) with revised logic, and/or replacing the Double Clutch.
full bulletin at NHTSA ↗Certain vehicles (listed below) equipped with 7-speed Double Clutch Transmissions (DCT) may exhibit abnormal vibration at low speeds. This bulletin outlines the procedures for diagnosing clutch judder, updating the Transmission Control Unit (TCU) with revised logic, and/or replacing the Double Clutch.
full bulletin at NHTSA ↗This bulletin provides the procedure to update both the ECM (Engine Control Module) and the TCM (Transmission Control Module) on certain 2015-2017 Hyundai Sonatas equipped with 1.6L turbo engine 7-speed DCT Transmission.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2016 Sonata powertrain is a problematic acquisition. Oil burning dominates complaints: engines consume 1 to 4 quarts weekly, forcing weekly top-offs, with spark plugs fouling every 3,000–4,000 miles. Dealers run oil-consumption tests that fail repeatedly, then deny engine replacement by claiming mileage or ownership status voids coverage—even when the customer holds a 10-year/100,000-mile powertrain warranty with proof of proper oil changes.
Engine shutdowns occur without warning on highways and city streets, creating immediate collision hazards. Some owners report stalling twice in a few months; others describe loss of power while merging at 70 mph. Dealers often cannot diagnose these events because the check engine light clears before inspection.
Transmission troubles include refusal to shift, being stuck in gear, or complete failure with no warning codes. Hesitation and jerking during acceleration are common, especially at low speeds and traffic lights. One owner was stranded mid-intersection during a legal U-turn with a child in the back seat.
Electrical failures—battery drain leaving the car dead each morning, repeated alternator and battery failures within 1–2 years—leave owners powerless. Engine knock, metal shavings in oil, and oil leaks also appear frequently. Some owners report their dealer overfilled oil to mask bearing wear during diagnostics. Warranty denials are routine, and Hyundai's case managers often refuse escalation or new case numbers.
Same Hyundai Sonata powertrain reports on nearby years: 2013 · 2014 · 2015 · 2017 · 2018
Failure modes owners describe
Excessive engine oil consumption and burning
Engine consumes oil at rates far exceeding manufacturer specification (200–300 miles per quart in many cases, versus acceptable 400–500 mpq). Owners report needing oil top-offs every 500–2,000 miles, with some burning 3–4 quarts per week or 1–2 quarts weekly. Many oil pressure warning lights come on with minimal warning before oil becomes critically low. One owner's engine was nearly empty at a scheduled service; another found the dipstick empty before 3,000-mile intervals despite recent change.
When: Begins between 56,000–75,000 miles for most owners; continues throughout vehicle life with no permanent fix from repeated dealer repairs
Symptoms owners cite: Oil pressure warning light (brief illumination, then off); Oil level dropping rapidly between scheduled changes; Fouling spark plugs every 3,000–4,000 miles; Engine knocking and ticking under acceleration; Oil light warnings recurring after dealer repairs; Low oil levels even with recent oil changes
Codes mentioned: P0011
Repairs/costs cited: Dealers performed oil consumption tests (1,000-mile tests), combustion chamber cleaning, and software updates; repairs typically lasted only 1,000 miles before consumption resumed. One owner reported dealer intentionally overfilled oil by 3 quarts during bearing clearance test to mask mechanical noise. CPO warranty (10 year/100,000 miles extended to 120,000) repairs failed within 1,000 miles; manufacturer denies warranty coverage citing mileage or ownership status despite contract terms.
Recalls/TSBs owners mention: Theta II Settlement program active; multiple denials of engine replacement citing age, mileage, or second-owner status despite warranty contract. Hyundai instructed one owner to continue operating vehicle despite evidence of imminent engine failure. Case managers admitted dealers were out of compliance but refused safety-compliant remedy. Extended warranty repair attempts denied after initial failures.
Engine knock sensor detection system (KSDS) activation and connecting-rod bearing wear
Engine enters limp mode or severe power reduction due to knock sensor detection of connecting-rod bearing wear. Diagnostic code P1326 appears, vehicle loses propulsion or cannot maintain highway speeds. Part of known Hyundai safety recall/warranty extension program for Theta II engine defect.
When: 150,000 miles reported; issue related to factory defect in engine internals independent of maintenance
Symptoms owners cite: Sudden loss of power while accelerating or turning; Vehicle enters limp mode with flashing warning lights and audible alerts; Reduced power output; inability to accelerate properly; Check engine light with P1326 code
Codes mentioned: P1326
Repairs/costs cited: Dealer inspection found no signs of valve-train neglect or sludge, ruling out oil starvation or severe maintenance neglect. Issue consistent with factory connecting-rod bearing defect, not maintenance failure.
Recalls/TSBs owners mention: KSDS safety recall/warranty extension program exists; Hyundai customer care unwilling to open new case or escalate. Dealer indicated possible denial of engine replacement based on incomplete oil-change records despite vehicle exhibiting known KSDS safety condition.
Sudden loss of power or stalling while driving
Engine unexpectedly shuts off, loses all power, or enters severe limp mode during highway driving or city traffic, creating immediate collision risk. Events occur without warning or check engine light illumination in some cases. Owner stalled twice on highway; another on city streets at traffic lights; others while merging or exiting freeways at highway speeds.
When: Multiple instances from early ownership through 150,000+ miles; some owners report recurring events over years (e.g., 2018–2021)
Symptoms owners cite: Sudden complete loss of power on highway or city roads; Engine shuts off without warning; Check engine light may appear before, during, or not at all; Vehicle cannot accelerate or maintain speed; Power steering and other electrical systems fail during event; Loss of power when exiting freeway or at traffic lights; Check Hybrid System HEV warning light and triangle indicator (hybrid models); No warning lights or codes before event in some cases
Codes mentioned: P0010, P200A, P1326
Repairs/costs cited: Dealer visits often result in no diagnosis when check engine light is absent or clears before inspection. Hyundai and dealers have blamed oil starvation (despite recent oil changes with documentation), battery issues, alternator failure, and sensor problems. Multiple repair attempts including new spark plugs, engine components, batteries, and alternators have not resolved recurring stalling.
Recalls/TSBs owners mention: Class-action lawsuit against Hyundai mentioned by one owner regarding engine shutoff incidents. Dealers and Hyundai cite inability to reproduce the fault in shop. One owner had engine replaced under warranty after stalling incident; another was told engine needed replacement twice but then passed test and case closed. Hybrid models covered under known HEV-related TSB but repairs did not resolve issue over 6-month in-shop stay.
Hesitation, jerking, and sluggish acceleration / inability to reach target speed
Vehicle struggles to accelerate or hesitates when depressing throttle, especially at low speeds, traffic lights, or highway merging. Engine RPMs increase without proportional speed gain, vehicle jerks or lunges forward erratically, and some vehicles cannot exceed 55–60 mph even with full throttle. Issue makes highway acceleration and merging dangerous and unpredictable.
When: Multiple owners report from 27,000 to 100,000 miles; often recurring after dealer 'fixes'
Symptoms owners cite: Hesitation when accelerating from stop or low speed; RPMs increase but vehicle slow to respond; Vehicle jerks or lurches forward unexpectedly; Sluggish, weak acceleration; Unable to accelerate past 55–60 mph despite full throttle; Vehicle struggles on highway merges and inclines; Shuddering or shaking during acceleration; Gear changes slow or stuck between gears; Rough idle at traffic lights; Engine hesitation with decreased acceleration after oil changes (one owner)
Codes mentioned: P0010, P200A, P0011
Repairs/costs cited: One owner's solenoid was suspected to be failing at 27,000 miles; dealer service 'fixed' issue but problem returned one week later. Another had CVVT seal replacement (TSB 15-01-022-1 applied). Variable Charge Motion Actuator (VCMA) replacement cited for P200A code; multiple engine component replacements (camshaft position sensor, CVVT cover, spark plugs, engine gaskets) attempted without resolution in some cases. Transmission solenoid reprogramming performed repeatedly without permanent fix.
Recalls/TSBs owners mention: Service Campaign SB-10058136-4434 (2015 model E-CVVT seal replacement) exists but not consistently applied to 2016 models with identical failure. Hyundai TSB 15-01-022-1 (CVVT intake oil seal) addresses similar symptoms but not all instances.
Transmission failure and shifting issues
Automatic transmission fails to shift gears properly, becomes stuck in gear, or refuses to shift into reverse or drive. Vehicles become trapped in intersections or unable to move. Some transmissions fail without warning; others show no codes during dealer diagnostic but fail intermittently.
When: As early as 27,000 miles (solenoid failure); others at 100,000+ miles. Recurring issues over multiple years.
Symptoms owners cite: Gears do not shift; transmission stuck in one gear; Transmission fails to engage or respond; Unable to shift into drive or reverse; Vehicle trapped in intersection unable to complete turn; No warning codes or check engine light; Transmission failure with no preceding symptoms; Vehicle stalls when attempting to shift; Clicking noise when pressing brake and shifting gears; Gear solenoid issues; clicking from transmission
Repairs/costs cited: Clutch actuator replacement attempted; old actuator reprogrammed and reinstalled; failed again 500 miles later. Transmission fluid flush and oil change performed. Extended warranty approval delayed for 3+ months; dealer confirmed transmission failure but manufacturer slow to approve repair.
Recalls/TSBs owners mention: Transmission failure confirmed by dealer; extended warranty claimed to cover but approval process takes months. Clutch actuator reprogramming does not provide permanent fix. Some owners' vehicles are under warranty but repair approvals pending.
Engine knock and metal shavings in oil (bearing wear and sludging)
Audible metallic knocking from engine, particularly under acceleration. Oil inspections reveal metal shavings or particles, and oil becomes diluted with fuel (watery viscosity). Symptoms suggest connecting-rod bearing wear, oil sludging, or internal engine component failure.
When: Bearing issues detected at 150,000 miles; P0011 code and knocking in earlier cases (60,000+ miles)
Symptoms owners cite: Audible metallic knocking or ticking from engine; Knocking sound under acceleration; Engine rough idle; Metal shavings visible in oil; Oil diluted with fuel; watery or thin oil viscosity; Oil overfilled beyond normal full mark (dealer attempted to mask symptoms); Low compression in cylinders; Engine noise inconsistent with sludge or neglect
Codes mentioned: P0011
Repairs/costs cited: Independent mechanic confirmed P0011 code and engine noise on 3/25/2026. Dealer performed bearing clearance test (BCT) but intentionally overfilled oil by 3 quarts to muffle noise and artificially pass diagnostic, per owner documentation. Metal shavings and oil dilution documented via photo and video. One owner's engine seized; another experienced low compression failure after bearing wear.
Recalls/TSBs owners mention: Theta II Settlement program exists for engine bearing/oil dilution issues. Hyundai corporate case manager admitted dealer was 'out of compliance by being outside the standard notification time' but refused safety-compliant remedy. Owners instructed to continue operating vehicles despite evidence of imminent engine failure.
Electrical system failures: battery drain, alternator failure, starter issues
Electrical system drains battery overnight, leaving vehicle dead every morning. Batteries and alternators fail repeatedly within short intervals. Starter replaced under warranty but electrical issues persist. Multiple electrical components fail simultaneously or in sequence.
When: 2–8 years of ownership; some failures within 1–2 years of replacement parts
Symptoms owners cite: Battery dies overnight without use; Vehicle stranded with dead battery each morning; Loss of power steering and all electrical systems while driving; Complete loss of dash lights and power; Battery will not hold charge despite recent replacement; Electrical system failure after dealer visit; No power to start vehicle; jump-start required daily
Repairs/costs cited: Battery replaced twice; alternator replaced; starter replaced (OEM part costing 3× aftermarket price). Electrical issues persist after all replacements. Battery drain issue not diagnosed; dealer unable to isolate root cause.
Recalls/TSBs owners mention: No clear manufacturer response for systemic electrical drain. One owner reported Hyundai agreed electrical issue could be part of a previous recall, advised dealership visit, but dealership refused to repair citing incomplete recall information and requesting payment ($20,000+ estimated) for repair.
Engine fire or smoke with leaking oil
Smoke and sparks observed coming from engine during driving. Engine oil leaks onto ground. One vehicle caught fire and was reported to Hyundai Consumer Affairs.
When: Reported at various mileages; one case at 46,863 miles despite recent oil change
Symptoms owners cite: Smoke and sparks from engine; Oil leaking onto ground; Oil pressure warning light illuminated; TPMS, battery, and transmission warning lights; Engine fire (one case)
Repairs/costs cited: Tow authorization filed; dealership diagnosed need for engine replacement, transmission fluid flush, oil change, and drivebelt replacement. CVVT replacement, transmission flush, and oil change ordered in another case. One vehicle caught fire; owner incurred costs and filed case with Hyundai Consumer Affairs.
Recalls/TSBs owners mention: Hyundai Consumer Affairs case opened for fire incident; warranty not honored for engine and powertrain repairs. Hyundai instructed owner to perform CVVT replacement (not engine rebuild initially) despite symptoms of total engine failure.
Check Engine Light with diagnostic code P0010 (E-CVVT / camshaft position issues)
Check Engine Light illuminates with P0010 code, indicating intake camshaft/exhaust camshaft timing control seal failure or oil leak. Internal oil seal plug at intake camshaft E-CVVT becomes unseated, causing active oil leak. Symptoms match Hyundai Service Campaign TX3 (TSB 15-01-022-1) for 2015 models but issue also affects 2016.
When: Multiple instances from 60,000 to 100,000 miles
Symptoms owners cite: Check Engine Light with P0010 code; Loss of motive power and severe engine stumbling; Elevated idle (1,200–1,400 RPM); Power reduction when accelerating; Oil leak from intake camshaft E-CVVT seal; Rough acceleration and hesitation
Codes mentioned: P0010
Repairs/costs cited: E-CVVT seal replacement per TSB 15-01-022-1 resolves issue (confirmed by one owner). CVVT cover and sensor replacement performed. Hyundai Service Campaign TX3 officially applied only to 2015 models, but 2016 models exhibit identical defect and symptoms.
Recalls/TSBs owners mention: Hyundai Service Campaign TX3 and TSB 15-01-022-1 exist but not officially extended to 2016 model year despite identical failure mode.
Engine misfire, rough idle, and emissions issues
Engine misfires, rough idle at low speeds and traffic lights, and abnormal burning odor. Spark plugs foul repeatedly. Engine compression issues and misfire codes appear.
When: From 55,000 miles onward; spark plug fouling every 3,000–4,000 miles
Symptoms owners cite: Engine misfire with check engine light; Rough idle and hesitation; Abnormal burning odor from engine; Ticking noise from engine; Spark plug fouling every 3,000–4,000 miles; Engine light flashing (indicates misfire); Low acceleration; Power reduced to 40 mph or below
Codes mentioned: P0011
Repairs/costs cited: Spark plugs replaced multiple times (twice or more in single ownership period). Valve gasket cover replaced due to oil leak and smoking. Combustion chamber cleaning performed. Camshaft position sensor replaced. Engine maintenance warning indicator illuminated.
Recalls/TSBs owners mention: Multiple dealer visits and independent diagnostics (Firestone, AutoZone) unable to identify root cause after multiple component replacements.
Fuel system contamination and repeated fuel system cleanings
Owner required fuel system cleaning three times in under 2 years despite high-mileage maintenance and infrequent driving (less than 5,000 miles annually). Vehicle has chronic issues with fuel delivery and acceleration control.
When: Recurring need for cleaning within 2-year period
Symptoms owners cite: Vehicle struggles to reach speed limit; Requires repeated gas pedal presses to accelerate; Vehicle will not slow down properly; Requires repeated brake presses to slow vehicle; Vehicle jerks, speeds up unexpectedly without throttle input; Vehicle will not stop on demand; Loud noise and jerking at idle and in park; Loss of power during driving; Sudden acceleration causing near-collision risk
Repairs/costs cited: Fuel system cleaning performed three times in under 2 years; issue not permanently resolved. High-mileage maintenance completed but did not prevent recurrence.
Recalls/TSBs owners mention: Hyundai Consumer Affairs and BBB contacted; manufacturer response cited vehicle age/mileage as reason for non-coverage.
Harsh downshift surging and transmission control issues
Vehicle experiences harsh surging during downshifting at highway speeds when engine reaches full operating temperature. Transmission downshifts abruptly as if manually downshifting or braking hard, causing unexpected deceleration and forward head movement.
When: Occurs once engine reaches full operating temperature during highway driving
Symptoms owners cite: Harsh surge during downshift at 35 mph and higher speeds; Rapid deceleration during downshift; Head and body jerk forward in seat; Distracting and unsafe driving behavior; Occurs at highway speeds during normal operation
Repairs/costs cited: No repair actions documented in narratives.
Recall-related software update bricking vehicle
Hyundai factory recall (50HYZ) software update caused complete vehicle failure and loss of drivetrain power immediately after installation.
When: March 14, 2019 (oil change appointment during which recall performed)
Symptoms owners cite: Vehicle stalling on highway after software update; Jerking and loss of drivetrain power; Unable to exceed 60 mph after update; Complete software/ECU failure ('bricked')
Repairs/costs cited: Dealer stated software update 'bricked' the vehicle's ECU/powertrain control. Required replacement part (ECM or similar) on back order into May 2019, leaving vehicle undrivable for 2+ months.
Recalls/TSBs owners mention: Hyundai issued factory recall 50HYZ without apparent testing; dealer acknowledged software caused failure; parts availability created 2+ month delay for fix.
Synthesized from 58 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 4 most recent
Oil pressure sensor failure caused oil to leak into the injector harness damaging components and engine shutdown. Because this was a sudden engine shutdown and safety-related loss of motive power caused by an oil pressure sensor failure this presents a safety risk
Vehicle stalled while driving
When I drive my sonata, sometimes the gears do no switch. I can drive on a flat or inclined surface and it will act up. We've taken our car several times to the dealership for diagnostic testing to see what's going on. But when the car is connected or the serviceman drives the car, the car will switch gears and nothing is found on the diagnostic test. We currently driving a few states over and…
On November 10, 2025, my 2016 Hyundai Sonata Hybrid (VIN [XXX] , approximately 150,000 miles) experienced a sudden loss of power while I was turning right and accelerating into traffic. The vehicle immediately entered limp mode with flashing warning lights and audible alerts. The vehicle lost normal propulsion and could not accelerate properly, creating a dangerous situation as it was blocking a…
Had powertrain trouble with your 2016 Hyundai Sonata?
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 Hyundai Sonata?
It's a documented issue but not catastrophic. 58 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?
Across the 20 complaints that reported odometer mileage, most powertrain failures cluster between 41,800 and 75,000 miles, with the median around 60,000. A quarter of owners report trouble before 41,800; a quarter make it past 75,000. 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/2016/Hyundai/Sonata.
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.