P0700 on 2011-2018 Ford F-150: Transmission Control System Malfunction Guide

What's Unique About the 2011-2018 Ford F-150

This year range spans two F-150 generations and two different primary automatic transmissions. For models from 2011-2017 equipped with the 6-speed 6R80, the P0700 code is most famously associated with the failure of the internal molded leadframe. This part, which contains the output speed sensor and other critical electronics, is so prone to failure that Ford issued a Customer Satisfaction Program (19N01) extending its warranty. For 2017-2018 models, many of which came with the newer 10-speed 10R80 transmission, the causes for transmission faults are different and can include issues like a faulty CDF drum, valve body problems, or software glitches requiring calibration updates.

Generation note: This range covers the 12th generation (2011-2014) and the 13th generation (2015-2018) F-150. The primary automatic transmission until 2017 was the 6-speed 6R80. The 10-speed 10R80 was introduced in 2017 (initially on the 3.5L EcoBoost) and became more common in 2018. The most frequent cause for P0700, a faulty molded leadframe, is specific to the 6R80 transmission.

Symptoms You May Notice

• Check Engine Light and/or Wrench Light illuminated
• Harsh, erratic, or delayed shifting
• Sudden, unexpected downshifts (often to 1st gear at speed)
• Getting stuck in a single gear (limp mode)
• Loss of speedometer reading
• Gear indicator on the dashboard not displaying correctly or showing missing gears

Most Likely Causes

1. Faulty Molded Leadframe (6R80 Transmission) 🔴 High Probability The original leadframe design was prone to internal circuit failure and shorts, particularly with the output speed sensor (OSS). This is a well-documented, widespread issue confirmed by Ford's own warranty extension program 19N01.
   How to confirm: Scan the TCM for codes P0720, P0722, or P0731. The presence of these codes, sometimes accompanied by P1500, strongly indicates a leadframe failure as per Ford's TSB.
   Typical fix: Replace the molded leadframe inside the transmission oil pan. This involves draining the fluid, removing the pan, and replacing the leadframe on the valve body. Some owners have attempted this DIY, but caution against using aftermarket parts like Dorman, as failures have been reported within months.
   Est. part cost: $150-$350
2. Low or Dirty Transmission Fluid 🟡 Medium Probability → Shop Transmission Assembly Leaks from transmission cooler lines or the bulkhead connector sleeve can lead to low fluid levels. Fluid breakdown over time can also cause shifting issues, especially on the 10R80 which is sensitive to fluid quality.
   How to confirm: Check the transmission fluid level and condition. On many of these trucks, there is no dipstick, so the check must be performed from a fill plug on the transmission case itself. The fluid should be bright red (Mercon LV for 6R80, Mercon ULV for 10R80).
   Typical fix: Top off or perform a transmission fluid and filter change using the correct Motorcraft fluid.
   Est. part cost: $100-$250
3. Faulty Transmission Solenoid or Valve Body 🟡 Medium Probability → Shop Transmission Assembly
   How to confirm: Specific TCM codes will point to a particular solenoid (e.g., shift solenoid A, B, etc.). A technician can test solenoid resistance or perform a pressure test on the valve body. TCC shudder on the 10R80 can sometimes point to a sticking TCC regulator valve in the valve body.
   Typical fix: Replace the specific faulty solenoid or, in some cases, the entire valve body assembly.
   Est. part cost: $50-$800
4. Internal 10R80 Transmission Issues ⚪ Low Probability → Shop Transmission Assembly Early 10R80 transmissions have known issues, including problems with the CDF drum, bushings, and valve body, which can cause erratic shifting, harsh engagement, and generate fault codes.
   How to confirm: Diagnosis requires a deep dive by a transmission specialist, often involving disassembly to inspect for internal wear or damage. Technicians may also check for software updates that address shift quality.
   Typical fix: Requires a partial or full transmission rebuild to replace failed internal components.
   Est. part cost: $1000-$3000+

Rare But Worth Checking

• Damaged Wiring Harness: The external wiring harness leading to the transmission can be damaged by road debris or corrosion, causing a loss of communication. A visual inspection is always worthwhile.
• Faulty Transmission Control Module (TCM): → Shop Transmission Assembly While possible, complete failure of the TCM itself is rare. It's more common for the sensors integrated into the leadframe to fail on the 6R80.

Diagnosis Steps

1. Scan for codes in the Transmission Control Module (TCM) using an OBD-II scanner with that capability. P0700 is just the messenger; the specific TCM codes are essential.
2. If codes P0720, P0722, or P0731 are present on a 6R80 transmission, the molded leadframe is the primary suspect.
3. Check the transmission fluid level and condition. Ensure it is at the proper level and is clean, bright red fluid. Use Mercon LV for 6R80 and Mercon ULV for 10R80.
4. Inspect the main electrical connector at the transmission case (the bulkhead connector) for leaks or damage.
5. Visually inspect the wiring harness running to the transmission for any signs of chafing, melting, or corrosion.
6. If no leadframe codes are present, follow diagnostic procedures based on the specific codes found in the TCM, which may point to solenoids, the valve body, or other sensors.

Parts You'll Likely Need

• Transmission Molded Leadframe (6R80) (OEM #AL3Z-7G276-D) — This is the most common failure point on 2011-2017 F-150s with the 6-speed transmission that triggers a P0700 code. This part number is specified in Ford's service program.
  Trusted brands: Motorcraft
  OEM price range: $200-$350
  Aftermarket price range: $150-$250
• Transmission Fluid (OEM #XT-10-QLVC (Mercon LV for 6R80), XT-12-QULV (Mercon ULV for 10R80)) — Fluid must be replaced when dropping the pan for leadframe service or changed if found to be low or dirty. Using the correct fluid is critical for transmission health.
  Trusted brands: Motorcraft
  OEM price range: $10-$15 per quart
  Aftermarket price range: $8-$12 per quart
• Transmission Filter and Pan Gasket — Should be replaced any time the transmission pan is removed for service.
  Trusted brands: Motorcraft, ATP, Wix
  OEM price range: $40-$70
  Aftermarket price range: $25-$50

Related Codes That Often Appear With This One

• P0720 — Output Speed Sensor (OSS) Circuit Malfunction. This sensor is part of the molded leadframe on the 6R80, making this code a primary indicator of leadframe failure.
• P0722 — Output Speed Sensor (OSS) Circuit No Signal. Also points directly to a failure of the molded leadframe on the 6R80 transmission.
• P0731 — Gear 1 Incorrect Ratio. This can be triggered by the faulty speed sensor data from a failing leadframe.
• P0741 — Torque Converter Clutch Circuit Performance or Stuck Off. On 10R80 transmissions, this can indicate a sticking TCC regulator valve or other valve body issues.

Technical Service Bulletins (TSBs) & Recalls

• 19N01 - Customer Satisfaction Program for Transmission Molded Leadframe Extended Coverage on certain 2011-2013 F-150s and 2012-2013 Expedition/Navigators.
• 19S07 - Safety Recall for certain 2011-2013 F-150s to reprogram the PCM to prevent sudden transmission downshifts.
• 19S19 - Safety Recall for certain 2013 F-150s with 5.0L and 6.2L engines for PCM reprogramming to prevent downshifts.

Platform-Specific Known Issues

• Customer Satisfaction Program 19N01: Ford extended the warranty on the molded leadframe for certain 2011-2013 F-150s to 10 years or 150,000 miles. While this program has likely expired for most vehicles based on time, its existence confirms the high failure rate of the part. The program covered repairs if DTCs P0720, P0722, P0731, and/or P1500 were present.
• Rotted Transmission Cooler Lines: On some models, especially in rust-prone areas, the steel transmission cooler lines can corrode and leak, leading to low fluid levels and transmission damage.
• Safety Recalls 19S07 & 19S19: Related to the leadframe issue, these recalls were issued to reprogram the PCM to prevent an abrupt downshift to first gear if the OSS sensor failed, which could cause a loss of vehicle control.

Mechanic-Grade Diagnostic Values

• 6R80 Shift Solenoid E (SSE) Resistance — expected: 18 Ohms. Failure: Significant deviation from 18 Ohms indicates a faulty solenoid.
• 6R80 Turbine/Output Speed Sensor (TSS/OSS) Resistance — expected: 64-126 Ohms. Failure: A reading outside this range suggests a failed sensor, which is integrated into the leadframe.
• 6R80 Solenoid Control Circuit to PCM Continuity — expected: Less than 5.0 Ohms. Failure: Resistance greater than 5.0 Ohms indicates an open or high-resistance in the wiring between the transmission connector and the PCM.
• 6R80 Solenoid Control Circuit Short to Ground — expected: Greater than 10,000 Ohms. Failure: Resistance less than 10,000 Ohms indicates a short to ground in the harness.

Scan Tool Commands That Help

• FORScan: Clear Transmission Adaptive Tables — This service function resets the transmission's learned shift strategy. It should be performed after replacing components like the valve body or leadframe, or to address poor shift quality on both 6R80 and 10R80 transmissions.
• Ford IDS / FORScan: Transmission Adaptive Learning Drive Cycle — After clearing the adaptive tables, a specific drive cycle procedure is required for the transmission to properly relearn shift points. This involves a series of gentle accelerations and stops to ensure smooth operation.
• FORScan: Stop use of transmission adaptive learning — For troubleshooting persistent or erratic shift behavior on 10R80 transmissions, some users disable the adaptive learning feature entirely to see if it improves consistency, though this is an advanced, non-standard procedure.

Wiring & Ground Locations

• C175T — The center connector of the three main PCM connectors, located on the passenger side firewall.. This connector contains the primary circuits running from the PCM to the transmission, including signals for shift solenoids (Pins 10, 11), the Turbine Speed Sensor (Pin 16), Output Speed Sensor (Pin 25), and Transmission Fluid Temp sensor (Pin 19). Testing continuity and voltage at these pins is a key diagnostic step.
• Transmission Bulkhead Connector — The main external electrical connector on the passenger side of the transmission case.. This is the pass-through from the external vehicle harness to the internal leadframe. It is a common point for fluid leaks (from a failed sleeve/o-ring) and corrosion, which can interrupt signals and cause various transmission codes, including P0700. The connector sleeve should be replaced whenever the leadframe is serviced.

Real Owner Repair Stories

• Ford F150 Forum (2013 F-150 4x4, 147,000 miles) — Initially a P0720 code, leading to a lead frame replacement. About a week later, the truck shuttered and threw a wrench light. It then began to buck hard in traffic, got stuck in 1st gear, and went into limp mode.
  ❌ Tried (didn't work) Replacing the molded leadframe, connector bulkhead, and valve body seal initially seemed to work but the problem returned with new symptoms.
  ✅ What actually fixed it The new codes were P0770 and P0771 (Shift Solenoid E Malfunction). The owner was advised that the next logical step was to replace the specific solenoid or the entire valve body, as the issue persisted after the lead frame replacement, indicating a potential solenoid failure or a problem with the replacement part. The final resolution was not posted, but the diagnostic path points to a solenoid/valve body issue post-lead frame swap.
• Ford F150 Forum (2012 F-150 FX4 3.5L EcoBoost) — Sudden transmission failure with codes indicating a bad lead frame.
  ❌ Tried (didn't work) Calling the dealership, who quoted over $3,000 and a potential 6-month wait for the OEM part.
  ✅ What actually fixed it The owner purchased a Dorman-branded lead frame and installed it themselves along with a new filter and an aftermarket pan with a drain plug. The total cost was under $750, and the repair took a few days. The owner reported the Dorman part performed identically to the OEM part and resolved the issue.

OEM Part Supersession History

• AL3Z-7G276-A, AL3Z-7G276-B → AL3Z-7G276-D — Revision to improve reliability and address the high failure rate of the integrated speed sensors.
  Heads up: The 'D' revision is the correct and most current service part. While older 'A' or 'B' stock may be found, the 'D' version should always be used for replacement.
• Unknown (original 10R80 CDF Drum) → JL3Z-7H351-B — The original CDF drum had a bushing that could slide out of position, uncovering an oil passage and causing severe shifting problems. The updated part has a redesigned housing that acts as a dam to prevent the bushing from migrating.

Model Year Variations Within This Range

• 2011-2017 (6R80 Transmission): The primary cause of P0700 is overwhelmingly the molded leadframe (AL3Z-7G276-D). The repair is well-documented and involves dropping the pan and valve body.
• 2017-2018 (10R80 Transmission): P0700 causes are more diverse. A known major issue is the failure of the CDF (Clutch D/F) drum, where an internal bushing walks out of place, causing fluid pressure loss and catastrophic shifting events. Other issues include valve body cross-leaks and software that requires updates or an adaptive learning reset.

Diagnostic Flowchart

Other Known Issues on This Vehicle

Issues unrelated to this code that are worth knowing about as an owner of this generation:

• 3.5L EcoBoost Timing Chain Rattle on Cold Start 🔴 High — Common on 2011-2015 models. A rattle for 2-5 seconds on cold start indicates a stretched timing chain and/or failing VCT phasers. Ignoring it can lead to catastrophic engine failure. (Ref: TSB 18-2305, TSB 21-2119)
• 5.0L V8 Engine Knock or Oil Consumption 🟠 Medium — A light 'typewriter tick' or knock at idle is noted on many 2018+ 5.0L engines and considered a normal characteristic by Ford (TSB 19-2144). However, earlier 2011-2014 models had issues with out-of-round cylinders causing a more severe knock, and some 2015+ engines may consume oil. (Ref: TSB 19-2144 (for idle noise))
• Faulty Electronic Throttle Body (ETB) 🔴 High — Affects multiple engines in the 2011-2016 range. Can cause the truck to suddenly enter 'limp mode' with reduced power, a significant safety issue. Ford initiated a customer satisfaction program (16B32) to address it. (Ref: Customer Satisfaction Program 16B32)
• Brake Booster / Vacuum Pump Failure 🟠 Medium — On EcoBoost engines, the vacuum pump mounted on the back of the cylinder head can leak oil, causing a burning smell as it drips on the exhaust. On all engines, a failure in the brake booster or its vacuum lines can lead to a stiff brake pedal and loss of power brake assist.
• Panoramic Sunroof Drain Tube Clogs 🟡 Low — Common on higher-trim models. The drain tubes for the panoramic sunroof can become clogged, causing water to leak into the cabin, often staining the headliner and soaking the carpets.
• Frozen Door Latches 🟠 Medium — Primarily on 2015-2018 models in cold climates. Door latches can freeze, preventing the door from opening or, more dangerously, from latching closed, leading to a door opening while driving. This resulted in a recall. (Ref: Recall 18V894)

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: For this specific repair, a used part is generally not recommended. The primary failure part, the molded leadframe, is a known high-failure item due to a design defect. A used leadframe from a junkyard carries a very high risk of either being already faulty or failing soon after installation.

What to inspect on the donor part:

• Not applicable as used leadframes are not advised.

OEM-only on this vehicle (don't cheap out):

• Transmission Molded Leadframe (6R80): The Motorcraft OEM part (AL3Z-7G276-D) is strongly recommended. While it was on backorder for a long time, leading many to try aftermarket options, the OEM part has the highest rate of success.
• Transmission Fluid: Only use the specified Motorcraft Mercon LV (6R80) or ULV (10R80). These transmissions are highly sensitive to fluid type, and using a generic 'multi-vehicle' fluid can cause shifting problems.

Brands owners have reported issues with on this vehicle:

• Dorman (Lead Frame): While some owners have used the Dorman replacement out of necessity when the OEM part was unavailable, and some have had success, there are also numerous reports of the Dorman part failing within weeks or months of installation. It should be considered a high-risk alternative to the Motorcraft part.

Real Owner Stories

Aggregated from forums and TSBs cited above. Mileages and costs reflect what owners reported in those sources.

Related OBD-II Codes

• P0720 — Output Speed Sensor (OSS) circuit error; frequently triggers P0700 and is a primary indicator of a failing molded leadframe in the 6R80 transmission.
• P0722 — Output Speed Sensor (OSS) No Signal; often occurs alongside P0700 when the leadframe internal circuits short.
• P0731 — Gear 1 Incorrect Ratio; a code that, when paired with P0700, is specifically cited in Ford's 19N01 warranty extension for leadframe failure.
• P1500 — Vehicle Speed Sensor (VSS) intermittent signal; often accompanies leadframe-related speed sensor codes and P0700.
• P0715 — Input/Turbine Speed Sensor Circuit Malfunction; reported by owners as a failure code following the installation of faulty aftermarket leadframes.

Frequently Asked Questions