Control module (ECM/PCM/BCM) failure on the 2014 Jeep Grand Cherokee
When control module (ecm/pcm/bcm) failure gets reported
Owners of the 2014 Jeep Grand Cherokee report control module (ECM/PCM/BCM) failure at a median of 37,500 miles. A quarter of the reports come in before 15,000 miles and a quarter after 65,000 miles, from 30 reports that carried an odometer reading.
A part like this is normally expected to survive 92,000 miles. It is the 11th most-reported problem on this model year.
The mileage distribution
The reported range runs from 7,500 miles at the tenth percentile to 82,500 miles at the ninetieth, a spread of 74,620 miles across the middle 80% of reports.
When the reports scatter this far, the mileage is telling you about how these cars were driven more than about the part itself.
43% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 7,980 miles | 15,000 miles | 37,200 miles | 65,000 miles | 82,600 miles |
Read the 10th percentile as “one report in ten arrived this early”. Exact figures are shown in this table because it is the table of record; everywhere else on the site they are rounded to the precision the sample can carry.
What a percentile can and cannot tell you here
These five numbers describe the readings owners gave, in order. The median is the middle one: half the reports arrived below it. The 10th and 90th are the edges of the bulk of the distribution, and the distance between them is the part worth reading. A tight spread — say 70,000 to 95,000 miles — points at something that wears out on a schedule, and the schedule is knowable. A wide one, 20,000 to 190,000, points at a fault that hits some cars and never troubles others, which means the mileage on the listing in front of you tells you very little about your odds.
What these figures are not is a survival curve. Every reading here comes from a car whose owner filed a complaint, so the sample contains only failures: it cannot say what share of the fleet made it past 150,000 miles untouched, because those owners had nothing to report. Nor is the mileage the moment of failure — it is the odometer reading as recalled at the time of filing, which may be weeks later and is sometimes rounded to the nearest ten thousand by the person typing it.
Percentiles are shown at all only once 8 readings exist for the vehicle and mode. Below that the middle of a handful of numbers is noise wearing a decimal point, so the figures are withheld rather than dressed up.
What happens, and what it costs
Putting it right typically runs $700–$3,000 at an independent US shop. That range is an editorial estimate held in this site's failure-mode catalogue, not a figure from NHTSA, and it is a repair cost rather than a diagnosis cost.
The same failure on other years
The same failure is reported on 25 model years of this car. It shows up earliest on the 2013, at a median of 5,000 miles, and latest on the 1998 at 160,000 miles.
By volume the 2014 is the worst of them, which makes this a problem of this specific year rather than of the model as a whole.
If one year stands out to the left, that is the year to avoid; if the whole line sits at a similar mileage, this is wear rather than a defect in one production run.
Tick median reported mileage Solid middle half of reports Faint 10th to 90th percentile Colour how bad the failure is when it happens
What owners wrote
Verbatim from NHTSA complaint narratives, trimmed for length. The mileage is the one the owner gave.
While driving uphill, in wet or rainy conditions, the new jeep diesel 3.0l engine starts to hesitate, this causes the vehicle to vibrate severely. The first occurrence was at 40mph, after taking it to the dealership they reflashed the tcm which I believe changed the shift points in the transmission, while driving home the same problem occurred, this time at 45mph. I took the jeep back to the dealership where they reflashed the PCM, when driving home the same problem occurred, this time at 50mph. This engine hesitation causes severe vibration, I am worried that if the engine cuts out at this speed, it will cause a serious accident. I have video footage of this occurring. *tr
On a recent long trip (500 miles each way) a computer malfunction popped up while driving. The vehicle's phone called for service, followed by the airbag light and seat belt indicator went off. I pulled into a jeep dealer right before closing and the told me the issue was in the airbag control module somewhere but it couldn't be fixed easily and that the parts were on back-order. The car is drive-able but the airbag system is inoperative. I have since spoken to the dealer in my home-state and confirmed this is a common problem popping up on the 2014 model year grand cherokee and that even replacing the module was a guess at best as to what the problem was. So long story short I have a brand new vehicle with less than 10,000 miles with a malfunctioning/inoperative airbag system that the dealership says may or may not be fixable. *tr
On a recent long trip (500 miles each way) a computer malfunction popped up while driving. The vehicle's phone called for service, followed by the airbag light and seat belt indicator went off. I pulled into a jeep dealer right before closing and the told me the issue was in the airbag control module somewhere but it couldn't be fixed easily and that the parts were on back-order. The car is drive-able but the airbag system is inoperative. I have since spoken to the dealer in my home-state and confirmed this is a common problem popping up on the 2014 model year grand cherokee and that even replacing the module was a guess at best as to what the problem was. So long story short I have a brand new vehicle with less than 10,000 miles with a malfunctioning/inoperative airbag system that the dealership says may or may not be fixable. *tr
Also reported on the 2014 Jeep Grand Cherokee
Other body or interior problem
Other powertrain problem
Other electrical problem
Other engine problem
Other brake problem
Seat belt or retractor failure
How far this goes
Complaints are voluntary, so 52 is a floor and not a count of affected cars. Mileages are typed in by owners and cluster on round numbers. And the mode itself is assigned by software reading the complaint text, which is reliable in bulk and fallible one report at a time.
Questions this page answers
At what mileage does control module (ecm/pcm/bcm) failure happen on the 2014 Jeep Grand Cherokee?
Across 30 owner reports that included an odometer reading, half were filed by 37,500 miles. A quarter were filed before 15,000 miles and a quarter after 65,000 miles. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is control module (ecm/pcm/bcm) failure on the 2014 Jeep Grand Cherokee?
52 reports have been filed with NHTSA, about 0.5 per 1,000 vehicles. Complaints are voluntary, so this is a floor rather than a count of affected cars.
What this is and is not. These are the mileages at which owners chose to complain to a federal agency, which is not the same as the mileage at which the part fails on every car. It skews toward failures that happened outside warranty, cost real money, or frightened someone. It is still the only public dataset that carries failure mileage at all, and the shape of a few hundred readings is informative even when a single one is not. Methodology · JSON · this failure on other cars
Source Owner complaints and recall records published by the US National Highway Traffic Safety Administration, model years 1996–2027 Figures rebuilt Published by AtWhatMileage How every figure is computed