MIL/check engine lamp comes on after performing U90 recall PCM software update.
full bulletin at NHTSA ↗2016 FIAT 500X powertrain problems
moderate 47 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Failure mileage
Complaints
47
Recalls
0
Avg fix
$2,500
When does it fail?
Of the 47 powertrain complaints filed for the 2016 FIAT 500X, here's the actual mileage breakdown — failures cluster heaviest at 25,000-50,000 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
Powertrain accounts for 31% of every owner complaint on file for this vehicle — the dominant problem area across 9 categories tracked.
Owners have filed 47 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.
Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P1D7F-00 - ETC Self-Learning Failure. P1523-00 - VVA Low Oil Pressure. P1524-00 - Oil Pressure Out Of Range - Camshaft Advance/Retard Disabled. P0141 - O2 Sensor 1/2 Heater Performance. Some customers may experience one or more of the following conditions: After a short trip and shutting the engine off for 5-10 minutes, vehicle exhibits a lo
full bulletin at NHTSA ↗Gear Ratio DTC?s, Transmission Shift Concerns, Does Not Shift At Times, Shudders
full bulletin at NHTSA ↗Transmission Kit with Torque Converter 1. All Promaster (VF) 3.6L/62TE equipped vehicles. If the transmission bracket to the transmission case fasteners are removed during servicing, the fasteners (Part Number 06511385A$) are one-time usage. Vehicles built prior to 10/23/2015 requires Service Kit PN 68461214AA; includes Transmission Isolator PN 68264483AA, and Adaptation Bracket 68264479AA and Fastener Service Kit PN 68329056AA Vehicles built after on or after 10/23/2015 will require only the Fastener Service Kit PN 68329056AA. 2. All 3.6L/62TE equipped vehicles. If the vehicle you are repairing has a crack in the flex plate or failed pump bushing inspect and confirm that both (2) dowel pins
full bulletin at NHTSA ↗Flash: Drivetrain Control Module (DTCM) Diagnostic and System Improvements This bulletin involves reprogramming the DTCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs):C2502-64 - Signal Plausibility Failure. C2210-92 - ETM Hall Sensor Performance Or Incorrect Operation. C2220-54 - ETM Calibration Error Missing Calibration. C2020-01 - ECU Internal Fault - General Electrical Failure. This software update also includes the following enhancementsReduce Rear Drive Module (RDM) noise during disconnect phase at speeds above 45
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2016 Fiat 500X powertrain fails in multiple overlapping ways. Most common is unexpected shift to neutral while driving—happens at any speed, on highways or city streets—leaving owners coasting until they shut down and restart the vehicle. Hard shifts between gears, rough jerking when accelerating, and transmission hesitation are reported by dozens of owners. Several report the vehicle entering Limp Mode when wheels slip, making it uncontrollable for 5+ seconds in traffic.
Engine cooling fan failures trigger Check Engine lights and Drive Mode Unavailable messages, with intense heat despite normal gauges. Engine oil burns rapidly (one owner adds a quart every two weeks), and stalling occurs without warning. Electrical gremlins layer on—warning light cascades, failed starts, corroded batteries, blown lights.
Dealers either cannot replicate problems during test drives or blame owners for "something sticky spilled" into the transmission. PCM/TCM reprogramming and software updates don't stick. Many owners discover they fall outside NHTSA Recall Campaign 16V529000, despite matching the recall's exact symptoms. One owner's VIN was removed from the recall database after an initial dealer phone call. Another found the cooling fan recall only online; the dealership had never notified her. Owners report transmission replacements, torque converter swaps, and driveshaft replacements within 20,000 miles, yet dealerships provide no explanation and offer no concession.
Failure modes owners describe
Unexpected shift to neutral
Transmission disengages and shifts into neutral while driving, sometimes without warning. Owner loses power and must restart vehicle to regain drivability. Occurs sporadically at various speeds—city streets, highways, during turns, or straight driving.
When: Varies widely; some owners report early in ownership, others after 30k-100k+ miles. One report at 700 miles.
Symptoms owners cite: Vehicle suddenly shifts from Drive to Neutral; RPM elevated but vehicle fails to accelerate; Loss of power while driving; Vehicle coasts to a stop; Engine runs but drivetrain disengaged; Check engine light may illuminate; Drive Mode Unavailable warning
Codes mentioned: P0481
Repairs/costs cited: Owners report dealer inability to replicate or diagnose. PCM/TCM reprogramming attempted but ineffective. In some cases, transmission rebuild or replacement attempted. One case mentioned failed instrument cluster also diagnosed.
Recalls/TSBs owners mention: Multiple owners report NHTSA Campaign 16V529000 (Powertrain) exists but their VINs were not included despite identical symptoms. Some owners discovered recall only by searching online, not by manufacturer notification. Dealers initially denied vehicles were part of recalls.
Hard or rough gear shifting
Transmission shifts with noticeable jerking, lurching, or harsh engagement between gears. Often occurs during acceleration or deceleration. Can feel like vehicle will stall or lurch forward abruptly.
When: Throughout ownership; some owners report from early driving. One owner reports within 30 days of purchase at 28k miles.
Symptoms owners cite: Hard shift from 1st to 2nd gear at takeoff; Jerking or shaking when shifting; Noticeable jerk when engaging gears; Vehicle lurches forward when shifting; Clunky shifting feel; Sudden downshifts while maintaining highway speed; Herky-jerky driving experience
Repairs/costs cited: Dealers unable to resolve; software updates applied without success. One owner mentions almost being rear-ended due to harsh 1st-to-2nd shift. Manual shift mode used by some owners as workaround.
Recalls/TSBs owners mention: Software updates issued but ineffective per owner reports. Recall 16V529000 exists but many affected VINs not included.
Transmission shift delays and hesitation
Transmission delays engagement when accelerating; engine revs without vehicle moving. Can take several minutes to shift. Affects ability to pass safely or merge into traffic.
When: Reported throughout ownership; one owner purchased vehicle with 28k miles and experienced immediately.
Symptoms owners cite: Delay in shifting up to several minutes; Engine revs to 600 RPM before shifting; Hesitation to engage when pressing accelerator; Lag in acceleration when needed; Inability to pass other vehicles; Cannot accelerate quickly
Repairs/costs cited: Owner reports 30-day-old vehicle with issue; dealer provided no diagnostic paperwork and denied problem exists.
Vehicle enters Limp Mode excessively
Transmission enters protective Limp Mode when wheels slip or during acceleration, rendering vehicle inoperable for 5+ seconds until computer resets. Can occur on hills, curves, ramps, or wet surfaces. Unsafe in traffic situations.
When: Occurs during normal driving conditions with wheel slip.
Symptoms owners cite: Vehicle enters Limp Mode when wheels slip slightly; No throttle response during Limp Mode; Vehicle inoperable 5+ seconds or longer; Vehicle slides on hills or curves in Limp Mode; Unpredictable acceleration after Limp Mode clears; Hazardous in traffic or when merging
Repairs/costs cited: Dealer states all new Fiat 2WD and 4WD models have this issue and cannot be fixed. Owner advised to avoid wheel slip and provide extra lead time before entering traffic.
Recalls/TSBs owners mention: Dealer states issue cannot be fixed and is endemic to all new Fiat models.
Engine cooling fan failure with overheating
Engine cooling fan malfunction causes overheating and triggers Drive Mode Unavailable message and Check Engine light. Intense heat detected from engine despite normal temperature gauge reading. Related to plastic vs. metal heat shield design on fan module.
When: Multiple reports; one owner at 10k miles, another at 27.4k miles. One owner at 67k miles with metal in transmission suggesting prolonged overheating.
Symptoms owners cite: Check Engine light illuminates; Drive Mode Unavailable message displays; Intense heat from engine compartment; Temperature gauge reads normal despite overheating; Service Engine light comes on; Engine throws code P0481; Car cannot be driven in traffic; quickly overheats
Codes mentioned: P0481
Repairs/costs cited: Fan module replacement addresses the symptom. One owner notes cooling fan on national backorder with no ETA. Recall specifically identifies BU/FB fan modules with plastic vs. metal heat shields as problem components.
Recalls/TSBs owners mention: NHTSA Recall (updates to recall campaign for cooling fan) issued but many VINs not properly listed in system. Owners had to discover recall online. Dealer initially denied vehicles were part of recall. FCA Recall Assistance Center eventually assisted one owner after VIN lookup confirmed eligibility.
Excessive oil consumption
Engine burns or leaks oil rapidly, requiring frequent top-ups. One owner reports adding 1 quart every 2 weeks. Causes low-oil conditions leading to stalling and potential engine damage.
When: Early in ownership for multiple owners; one at 45k miles on second owner.
Symptoms owners cite: Rapid oil level drop; Frequent oil top-ups required (1 quart every 2 weeks in one case); Low oil warning absent or not functioning; Vehicle stalls due to low oil; No alert of low oil level despite oil being too low
Repairs/costs cited: One owner received oil consumption test at dealership; initially failed then declared working normally. Another owner received oil change with additive and fuel injection cleaning for $600 after low-oil diagnosis, but issue persisted.
Recalls/TSBs owners mention: Related to high oil consumption recall issue. One owner's vehicle initially denied as part of recall, then included in updated recall.
Vehicle stalls or fails to start
Engine stalls unexpectedly while driving or fails to crank when starting. Can occur on highways with children aboard or while parked. No warning before stalling.
When: Various timing; highway driving, city streets, parked in driveway. One report while driving with child in back seat.
Symptoms owners cite: Vehicle stalls suddenly while driving; Engine turns off without warning; Difficulty starting; multiple crank attempts needed; Vehicle unresponsive after stalling; Takes time for vehicle to restart; No warning lights before stall event
Repairs/costs cited: Dealer attributed one case to low oil level despite recent service and multi-point inspection. Another case attributed to bad ignition coil causing misfire. Towing required in some cases.
Recalls/TSBs owners mention: Dealers unable to identify root cause. Owners escalated to FCA with case numbers (57913062, 58008152) but received no response.
Electrical system malfunctions
Multiple electrical faults including no-start conditions, warning light cascades, battery issues, and component failures. Forward collision warning intermittently disables, lights blow frequently, battery corrodes rapidly.
When: Throughout ownership; some appear early (1 year after purchase), others after higher mileage (67k miles).
Symptoms owners cite: All warning lights flash in sequence on start attempt; Forward collision warning turns off intermittently; Passenger side lights blow frequently; Battery corrosion and acid leakage; Radio turns on and off by itself; Daytime running lights don't work; Service Engine, Check Transmission, Service Airbags, Service Power Steering, Electronic Park Brake all illuminate together
Repairs/costs cited: Torque converter and valve body replaced in one case after metal found in transmission, but did not resolve electrical issue. Burning smell noted. Multiple shop visits (at least 3) with no diagnosis.
Recalls/TSBs owners mention: Dealerships unable to diagnose or fix; owner kept on open warranty claim but no resolution.
Transmission metal debris and fluid leaks
Transmission generates metal particles and internal fluids leak from undercarriage. Undercarriage melted and deformed in at least one case. Fluid leakage visible under vehicle.
When: Within 2 years and 20,000 miles of ownership.
Symptoms owners cite: Metal detected in transmission fluid; Undercarriage melted and deformed; Major oil/fluid leakage from undercarriage; Transmission failure requiring replacement; Driveshaft breakage
Repairs/costs cited: Transmission replaced but repair done incorrectly; vehicle had to be towed back in after repair. Driveshaft later broke and was replaced. Owner states no explanation provided and no concession offered.
Recalls/TSBs owners mention: Dealership manager stated car was 'deformed' but provided no explanation of cause.
Transmission warning lights and limp mode with undiagnosed root cause
Check Transmission and Service Transmission warnings illuminate; vehicle enters limp mode or loses power. Root cause cannot be diagnosed by dealerships. May be related to cooling fan, electrical issues, or transmission itself.
When: Various; one at 2k miles, others at higher mileage after initial problem-free period.
Symptoms owners cite: Check Transmission warning light; Service Transmission message; Transmission warning light intermittent; Vehicle enters limp mode; Slow acceleration or loss of power when warning appears
Repairs/costs cited: Dealers unable to determine cause. In one case, cooling fan replacement resolved some but not all symptoms (odd idling persisted).
Recalls/TSBs owners mention: Manufacturer acknowledged VIN in some cases but stated not covered under recall. Dealerships unable to provide diagnosis or repair.
Synthesized from 47 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 12 most recent
Vehicle goes into "limp mode" anytime wheels slip, untill computer clears no throttle or motion, vehicle is inoperable for over 5+ seconds and then accelerated at whatever position throttle is at. Dealer and mechanics say all new fiats 2 and 4wheel drive all have this issue and they cannot fix. I pulled out into traffic, wheel slipped and went into limp in middle of lanes untill it cleared and…
I slightly overshot a stop sign at the bottom of a steep hill. I saw that a car with the right of way was rapidly approach the intersection so I put the car in reverse with the intent to back up the car a couple of feet. I put the car in reverse and took my foot off the brake and instead of engaging the gear in reverse, the car rolled forward in neutral farther into the intersection before the…
While driving, the vehicle will randomly shift to Neutral with a message appearing about shifting gears. When this happens I cannot accelerate or brake, and cannot shift gears. The only way to get the car to operate properly again is to turn the engine off and back on. Suddenly losing the ability to drive the car while on the road like this is definitely a safety risk, to me and other drivers.…
I received the error message "drive mode unavailable" with a service engine message after my last regular service appointment and oil change. My car is at 27,400 miles and after throwing that code barely could make it up a residential hill. After the local service department claimed to have fixed it, 3 miles down the road the message popped up again and driving was difficult. My local…
My 500x that I purchased in july of 2016 has shifted gears to the + symbol 4 different times while im driving. It started in sept but I thought I had it a bump or something. It happened again 3 times I did go back to the bettenhauser dealer for service 3 times and they said I had to not turn the car off and get to them before they closed because they could not see codes to the problem .at this…
While driving and slowing to a stop the transmission will shift into 1st early creating a jump or surge while slowing. The only way to stop this from occurring is to switch to manual shifting and down shift manually when almost to a complete stop.
Transmission hesitates to engage after pressing accelerator and also shifts roughly when it does change gears. All available software patches have been applied by dealer, however the problem persists. This is a safety issue, especially when merging or turning into traffic, since acceleration can lag randomly when it is needed the most. Because of the acceleration bursts and lags when shifting,…
The contact owns a 2016 Fiat 500X. The contact stated that on two separate occasions, the vehicle stalled without warning. Upon investigation, the contact discovered NHTSA Campaign Number: 16V529000 (Power Train) which she linked to the failure. The contact called the manufacturer who referred her to the dealer. The dealer advised her to drive the vehicle for 2,000 miles to track the failure and…
Since the car was purchased, the electrical system seems to have an issue that no dealership has been able to diagnose or fix. The forward collision warning system will intermittently turn itself off upon starting or even while driving. The car also frequently blows passenger side lights. More recently at about 67,000 miles, the check engine and transmission warning lights came on while highway…
I lease a 2016 fiat 500x in may of 2020. I received a letter saying there was a recall on my vehicle. Recently my car has completely stopped working. It was using up oil to fast. My car would stall out in the middle of the road. Or my car would not turn on completely. I kept up with maintenance ( oil changes etc. ) in June of 2022 my car started over heating. The day before I had just got my oil…
Had powertrain trouble with your 2016 FIAT 500X?
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 FIAT 500X?
It's a documented issue but not catastrophic. 47 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 33 complaints that reported odometer mileage, most powertrain failures cluster between 28,300 and 68,500 miles, with the median around 39,000. A quarter of owners report trouble before 28,300; a quarter make it past 68,500. 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/FIAT/500X.
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.