Most speed sensor codes are an annoyance. This one is not. P0720 on a Ford 6R80 is the code behind three separate federal safety actions, and the failure it describes can put a loaded F-150 into first gear at highway speed with the rear tires locked up. If a customer hands you a truck with a wrench light and this code stored, you are not looking at a shift quality complaint. You are looking at something Ford agreed was a crash risk.
It is also the one 6R80 speed sensor code somebody else might pay for. P0720 is the first DTC Ford lists as a qualifier for its leadframe extended coverage program. But that money only shows up if you work the job in Ford's order, and a lot of shops get that backwards.
The short version: P0720 means the PCM lost a usable signal from the output shaft speed sensor. On a 6R80 that sensor is molded into the internal leadframe, so there is no bolt-on part to sell. Ford's repair order is reflash the PCM first (safety recall 19S07), and only then replace the molded leadframe (program 19N01, part AL3Z-7G276-D, 2.2 hours). Do it in the other order and you may eat the labor.
What the PCM Is Actually Complaining About
The output shaft speed sensor is how the powertrain control module knows how fast the truck is moving. Not the ABS module, not the tailshaft, not the tires. The PCM's own road speed reference comes off the output shaft, and it uses that number for shift scheduling, torque converter clutch apply, and the gear ratio plausibility checks that set codes like P0731.
P0720 is the circuit-level complaint: the signal is missing, out of range, or electrically implausible. Its siblings P0721 and P0722 describe the same sensor failing in the range/performance and no-signal directions. In the Ford programs these codes travel together, which is why 19N01 lists P0720, P0722, P0731 and P1500 as one qualifying set rather than four separate faults.
Here is why the failure is dangerous rather than merely irritating. If the OSS signal cuts out for a fraction of a second while the truck is rolling, the PCM does not see "sensor fault." It sees zero miles per hour. And the correct gear at zero miles per hour is first. Ford's own description in recall 19S07 is that an intermittent OSS failure may result in an unintended downshift into first gear, and that depending on speed at the time, an abrupt wheel speed reduction may occur which could cause the rear tires to slide or lock up. NHTSA's summary of campaign 19V075000 puts it plainly: the transmission may unexpectedly downshift into first gear regardless of vehicle speed, which may result in a loss of vehicle control.
Three Recalls Deep: The History That Tells You What to Expect
This problem has been chased through the fleet three times, and knowing the sequence saves you diagnostic time.
| Campaign | Ford number | Vehicles | Remedy | Began |
|---|---|---|---|---|
| 16V248000 | 16S19 | 2011-2012 F-150; 2012 Expedition, Navigator, Mustang | PCM reprogram | Sept 19, 2016 |
| 19V075000 | 19S07 | 2011-2013 F-150 with 6R80 | PCM reprogram | Mar 4, 2019 |
| 19V433000 | 19S19 | 2013 F-150, 5.0L and 6.2L, already done under 19V-075 | PCM reprogram again | Jun 24, 2019 |
The first campaign is worth reading in Ford's own words. The Part 573 report for 16V-248 lists production windows of August 19, 2011 through March 9, 2012 for the F-150, through December 19, 2011 for the Expedition and Navigator, and through February 21, 2012 for the Mustang, and it describes an intermittent loss of the OSS signal that can cause a temporary downshift into first gear. Sometimes the signal recovers while driving, and sometimes the vehicle has to be stopped and restarted. Ford paired it with Customer Satisfaction Program 16N02, which extended molded leadframe coverage to 10 years or 150,000 miles and named P0720, P0722, P0731 and P1500 as the qualifying codes. On those trucks the 10-year clock has run out, so the leadframe is now a customer-pay repair even though the diagnosis is the same.
There is also a bulletin that predates all three campaigns. Ford TSB 13-6-8 (June 2013) describes 2011-2014 Mustang, 2011-2013 F-150 and 2012-2013 Expedition and Navigator units built on or before 4/8/2013 that engage in 5th gear from a stop, with the wrench light on, the speedometer at zero and dashes in the odometer. It notes P0720 and P0722 may or may not be stored, and it calls for the molded leadframe (AL3Z-7G276-A) without replacing the solenoids. If your truck has no stored code but shows that exact symptom set, that bulletin is the one to read. Our 6R80 limp mode guide walks through the other causes that produce a similar complaint.
Read that third row carefully, because it is the one that bites people. Per NHTSA, the software used to reprogram the PCM under 19V-075 on 2013 F-150 trucks with 5.0L and 6.2L engines did not have the necessary updates to prevent the unintended downshift. Those VINs were transferred to a new campaign and had to be flashed a second time. So a repair order showing the recall was already performed does not, on those specific trucks, mean the calibration is current. Verify the actual PCM strategy against the latest, not against the paperwork.
Run the VIN Before You Quote the Job
Ford's Customer Satisfaction Program 19N01, issued April 4, 2019, extended warranty coverage on the automatic transmission molded leadframe to 10 years of service or 150,000 miles from the vehicle's warranty start date. Coverage transfers to subsequent owners, and it is a one-time repair program.
The vehicle list is narrow and build-date specific:
| Vehicle | Model years | Plant | Build dates |
|---|---|---|---|
| F-150 | 2011-2013 | Dearborn | April 28, 2010 through October 28, 2013 |
| F-150 | 2011-2013 | Kansas City | May 18, 2010 through November 18, 2013 |
| Expedition / Navigator | 2012-2013 | Kentucky Truck | April 11, 2011 through August 19, 2013 |
Two catches. First, the coverage is conditional on the codes: Ford states that if the vehicle has other transmission-related concerns and P0720, P0722, P0731 or P1500 are not stored in the PCM, the program does not apply and the technician follows standard workshop manual diagnostics. Second, these trucks are now well past 10 years and 150,000 miles, and the program's grace window for out-of-limit vehicles closed October 31, 2019. Check OASIS anyway. It costs a minute and occasionally still pays.
Diagnosing It on the Scan Tool
Ford's transmission speed sensors are two-wire Hall-effect units supplied roughly 9 volts by the PCM, and Sonnax's guidance for the Ford speed sensor family is that the scanner is your best mode of diagnosis: pull up the transmission PIDs and select the specific ones that let you cross-check the sensors against each other. That article is written for the 10R series, but the PID naming and the correlation method carry straight across the Ford lineup. On a 6R80, the set worth graphing is:
- Output Shaft Speed (OSS)-Raw — the accused signal itself.
- Turbine Shaft Speed-Raw — your reference for whether the transmission is turning at all.
- Engine Speed (RPM) — third leg of the ratio triangle.
- Gear Commanded and Gear Ratio Measured — these expose the downshift event.
- Vehicle Speed — compare against an ABS wheel speed PID from the ABS module.
The signature you are hunting is not a flat line. A dead OSS is easy and rare. What sets P0720 on these trucks is an intermittent: OSS tracking normally, then dropping to zero for a fraction of a second while turbine speed and engine speed keep climbing, then recovering. Graph OSS against an ABS wheel speed signal and the dropout is unmistakable, because the wheel speed stays honest while OSS falls off a cliff.
Two conditions make it show up. Heat is the big one, so do the drive after the unit is up to operating temperature rather than around the block cold. Rough pavement is the other, because several of the causal factors are connection-related and vibration provokes them.
The five causes Ford actually named
When Ford filed the defect information behind this recall, it identified multiple causal factors for the intermittent OSS signal: contamination, a power short to ground, connector corrosion, connector pin swaging, and incorrect outputs from the sensor itself. That list is worth memorizing, because only the last one is the leadframe.
Before you condemn a $400 part, pull the pan and check the case connector sleeve where the harness passes through the case. That is the Kostal sleeve, and Ford's own 19N01 tool list calls out special tool 307-717 Kostal Sleeve Remover for the job. A corroded or oil-wicked sleeve produces exactly the intermittent, heat-sensitive dropout that P0720 describes, and it is a fraction of the cost. Check the pan magnet and filter while you are in there: contamination is first on Ford's own list, and fine metal debris bridging solenoid contacts on the leadframe is a documented 6R80 failure mode.
6R80 Transmission Case Connector Sleeve (2009-2017), OEM 6L2Z-7G276-AA
Connector corrosion is one of the causal factors Ford named for the intermittent OSS signal, and the case connector sleeve is the cheapest thing on that list to rule out. Pre-wired pigtail for a clean splice-in repair, from our sister store CoreTransmissionParts.
Shop the part for this fix →Browse all transmission wiring and electronics at CoreTransmissionParts →
The Repair, in Ford's Order
Step one: flash the PCM
Ford's instruction in 19S07 is unambiguous. Check for available PCM software and reprogram using IDS Release 113.06A or higher while connected to the internet, and the 19N01 document states that FSA 19S07 or 19B05 should be performed and/or closed before proceeding to the leadframe.
One practical note that will save you a bricked module: Ford flagged that its own technical assistance center was receiving multiple reports of programming failures on this recall, most of them traced to battery issues. Put a proper charger on the truck and hold the state of charge between 12.6 and 13.5 volts through the flash. A jump box on a tired battery is not a charger.
Step two: the molded leadframe
If the codes are still there after the flash, the leadframe comes out. The relevant numbers:
| Item | Spec |
|---|---|
| Part number | AL3Z-7G276-D, molded leadframe |
| Labor allowance | 2.2 hours (op 19N01B F-150 / 19N01C Expedition-Navigator) |
| Leadframe long bolts | Six, torqued to 53 lb-in (6 Nm) in the numbered sequence |
| Fluid | MERCON LV: XT-10-QLVC, XT-10-5Q3LV, XT-10-DLV, XT-10-6GLV |
| Special tools | 307-717 Kostal sleeve remover, 307-570 fluid fill tube, 307-D465 evacuator/injector, 416-D002 vacuum pump kit |
| Hand tools | 8mm swivel and deep sockets, TORX and TORX Plus 27, 19mm crows foot, 1/4 in torque wrench |
| Procedure reference | Workshop Manual Section 307-01, In-Vehicle Repair |
Three things go wrong on this job more than anything else.
Order the part before you open it. Ford puts this in the procedure as a note, and it is not bureaucratic filler: do not start until the leadframe is in your hand, because leaving the main control assembly out while you wait bleeds fluid out of the unit.
Align the TR sensor pin. When the new leadframe goes onto the main control assembly, the transmission range sensor pin must engage the manual control valve. Miss it and you get range complaints, a no-crank in park, or a truck that starts in gear. This is the single most common comeback on the job.
Respect the torque. 53 lb-in is 6 Nm. Those six long bolts thread into a plastic leadframe, and a 3/8 ratchet in an impatient hand will strip or distort it. Use a 1/4 in torque wrench and follow the numbered sequence rather than going around the perimeter.
Ford's program also budgets for a filter and pan gasket alongside the fluid, as an actual-cost miscellaneous expense up to $230. Do not put a used filter back in a unit you opened because the pan had contamination in it.
Step three: strategy codes and relearn
If the repair went any further than the leadframe and the valve body or solenoids were touched, the solenoid strategy and solenoid body ID codes have to be programmed into the PCM. Sonnax's write-up on 6R80 shift timing explains why: those codes tell the PCM the banding of each variable bleed solenoid, and the PCM leans on that to position the regulator valves for clutch apply. Get the strategy wrong and the truck will shift badly no matter how good the parts are. With correct codes entered, Sonnax notes the relearn can complete within three to five shift cycles.
Lead frames and conductor plates, case connector sleeves, solenoid sets, valve bodies, filter and pan gasket kits, and MERCON LV — matched to your 6R80 and shipped fast from the USA.
Shop 6R80 parts →Keeping It From Coming Back
The leadframe is an electrical assembly living in a bath of automatic transmission fluid, and the two things that kill it are contamination and heat. Neither is mysterious, and both are on the owner's side of the ledger.
Fluid first. The 6R80 takes MERCON LV, and Ford's fluid application chart is the reference to check rather than the parts counter's memory, because some later Ford applications moved to MERCON ULV and the two are not interchangeable. Debris circulating through the unit is what bridges solenoid contacts and etches connections, so a truck that has never had the pan off at 150,000 miles is a candidate whether or not it has a code today.
Heat second. These trucks tow. An intermittent that only appears on a long grade with a trailer behind it is a temperature story, and an auxiliary cooler is a cheaper conversation than a second leadframe.
And when the repair is done, road test it hot and long enough to matter. An intermittent that took twenty minutes to appear before the repair will take twenty minutes to appear after it.
FAQ
Can you replace just the output shaft speed sensor on a 6R80?
No. On the 6R80 the output shaft speed sensor is molded into the internal leadframe along with the turbine speed sensor, the fluid temperature sensor and the transmission range sensor, so Ford does not sell it as a separate part. Ford's own repair under Customer Satisfaction Program 19N01 replaces the complete molded leadframe, part number AL3Z-7G276-D, at a 2.2 hour labor allowance. That is why proving the fault before you order parts matters so much on this unit.
Is 6R80 P0720 covered under a Ford recall or warranty extension?
It can be, and P0720 is the first code Ford lists as a qualifier. Customer Satisfaction Program 19N01 extends molded leadframe coverage to 10 years of service or 150,000 miles from the warranty start date on specific 2011 to 2013 F-150 and 2012 to 2013 Expedition and Navigator builds, and it applies only when DTC P0720, P0722, P0731 or P1500 is stored in the PCM. Separately, safety recall 19S07 (NHTSA 19V075000) covers a PCM reprogram on 2011 to 2013 F-150 trucks. Always run the VIN in OASIS before quoting the customer, because the time and mileage caps on 19N01 have since lapsed for most trucks.
Why does a 6R80 downshift into first gear by itself?
Because the PCM calculates road speed from the output shaft speed sensor. When that signal drops out momentarily, the PCM briefly believes the truck has stopped and commands first gear, regardless of how fast you are actually travelling. Ford describes the result as an abrupt wheel speed reduction that can cause the rear tires to slide or lock up, and NHTSA classifies it as a loss-of-control crash risk. Treat an intermittent OSS on a 6R80 as a safety defect, not a driveability complaint.
Should I reflash the PCM or replace the leadframe first on a 6R80 P0720?
Reflash first. Ford's instruction in recall 19S07 is that the PCM software update should be performed or closed out before proceeding to the leadframe, and the 19N01 program document repeats that requirement. The updated calibration changes how the PCM reacts to a momentary OSS dropout, so some trucks stop downshifting after the flash alone. Doing it in the other order can cost you a warranty claim and can hide whether the leadframe was ever the problem.
What torque do the 6R80 molded leadframe bolts take?
Ford specifies 53 lb-in (6 Nm) for the six long bolts that hold the molded leadframe to the main control assembly, tightened in the numbered sequence shown in the 19N01 technical attachment. These are low-torque fasteners into plastic, so use a quarter-inch torque wrench rather than a ratchet and feel. Before you run the bolts down, confirm the transmission range sensor pin is aligned with the manual control valve, or the truck will come back with range and neutral-safety complaints.
Sources
- Ford Motor Company — Customer Satisfaction Program 19N01, "Transmission Molded Leadframe Extended Coverage," April 4, 2019 (hosted by NHTSA). Backs the qualifying DTC set P0720/P0722/P0731/P1500, the 10 year / 150,000 mile terms and October 31, 2019 grace date, the affected plants and build dates, leadframe part number AL3Z-7G276-D, the 2.2 hour labor allowance and operation codes, the 53 lb-in (6 Nm) six-bolt torque and sequence, the TR sensor pin alignment requirement, special tools 307-717 / 307-570 / 307-D465 / 416-D002, the MERCON LV part numbers, the $230 misc-expense provision, and the instruction that the program does not apply absent those codes. static.nhtsa.gov/odi/tsbs/2019/MC-10159510-0001.pdf
- Ford Motor Company — Safety Recall 19S07, Supplement #2, "6R80 Sudden Transmission Downshift — Powertrain Control Module Programming," June 13, 2019 (hosted by NHTSA). Backs the intermittent OSS failure and unintended downshift into first gear, the rear-tire slide and lock-up description, the IDS Release 113.06A reprogram remedy, the 12.6 to 13.5 volt battery state-of-charge requirement and the reported programming failures, and the reflash-before-leadframe repair order. static.nhtsa.gov/odi/rcl/2019/RCMN-19V075-2645.pdf
- NHTSA — Recalls by Vehicle database (Ford F-150, 2012 and 2013 model years). Backs campaign numbers 16V248000 / Ford 16S19 (began September 19, 2016), 19V075000 / Ford 19S07 (began March 4, 2019), and 19V433000 / Ford 19S19 (began June 24, 2019), the loss-of-control consequence language, and the finding that the 19V-075 software on 2013 5.0L and 6.2L trucks lacked the necessary updates. api.nhtsa.gov/recalls/recallsByVehicle
- Sonnax — "Diagnosing Ford 10R60, 10R80 & 10R140 Series Speed Sensor Issues," Jim Mobley, February 8, 2024. Backs the two-wire Hall-effect speed sensor design and the roughly 9 volt PCM supply, and the Ford scan tool method of pulling the transmission PIDs and cross-checking Output Shaft Speed-Raw, Turbine Shaft Speed-Raw, Gear Commanded and Gear Ratio Measured against each other. Cited here for the Ford speed sensor diagnostic method; the sensor count and ratio tables in that article are specific to the 10R family. sonnax.com/tech_resources/1373
- Sonnax — "Troubleshooting Ford 6R80 & 6R140 Timing-Related Shift Issues," Jim Dial, August 15, 2022. Backs the variable bleed solenoids losing calibration or banding over time, the role of solenoid strategy and solenoid body ID codes in telling the PCM each solenoid's banding for clutch apply, and the three to five shift cycle relearn. sonnax.com/tech_resources/1137
- Ford Customer Service Division, Chemicals & Lubricants — Automatic Transmission Fluid Application Chart. Backs MERCON LV as the specified 6R80 fluid and the separate MERCON ULV specification used on later applications. fcsdchemicalsandlubricants.com/quickref/atf2US.pdf
- Ford Motor Company — Technical Service Bulletin 13-6-8, "6R80 Transmission High Gear Engagement From A Stop," June 7, 2013 (hosted by NHTSA). Backs the 5th-gear start with wrench light, zero speedometer and dashed odometer on 2011-2014 Mustang, 2011-2013 F-150 and 2012-2013 Expedition/Navigator units built on or before 4/8/2013, P0720/P0722 that may or may not be stored, and molded leadframe AL3Z-7G276-A with no solenoid replacement required. static.nhtsa.gov/odi/tsbs/2013/SB-10053419-7635.pdf
- Ford Motor Company — Part 573 Safety Recall Report 16V-248 (Ford recall 16S19), April 25, 2016 (hosted by NHTSA). Backs the F-150, Expedition, Navigator and Mustang production windows, the intermittent OSS signal loss, the temporary downshift into first gear and the PCM reprogram remedy. static.nhtsa.gov (PDF)
- Ford Customer Service Division — Customer Satisfaction Program 16N02, "Molded Leadframe Extended Coverage," June 16, 2016 (hosted by NHTSA). Backs the 10 year / 150,000 mile leadframe coverage on 2011-2012 6R80 vehicles and the P0720/P0722/P0731/P1500 qualifying codes. static.nhtsa.gov (PDF)
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