P0700 on Lincoln: How to Diagnose & Fix
Transmission Control System Malfunction
1 Lincoln model · 1 documented issue · 1 critical
P0700 on Lincoln by model: symptoms, diagnosis and fix
Nautilus models built on or before March 11, 2021 with the 8F35 8-speed automatic commonly exhibit a shudder, buck, hesitation, or jerk while accelerating from a stop up to about 35 mph (57 km/h). Ford Technical Service Bulletin 21-2389 (superseding 21-2081) attributes the condition primarily to PCM/transmission solenoid control software rather than internal mechanical wear, though severe untreated cases progressed to harsh shifting and, in a minority of CarComplaints reports, complete transmission failure. This is the single most-complained-about Nautilus problem and is the subject of a Chimicles Schwartz Kriner class-action investigation covering 2019-2021 Edge/Nautilus 8F35 vehicles.
Common Symptoms
- Shudder or vibration felt through the floor while accelerating from a stop
- Bucking, jerking, or lurching at low speed (up to ~35 mph)
- Hesitation or harsh engagement when shifting into low gears
- Surging during light-throttle cruise
- In severe cases, slipping or transmission warning light
How to Fix
First-line fix per TSB 21-2389 is to reprogram the PCM with the latest software level and update the transmission solenoid (adaptive) strategy (about 0.9 hours labor, typically covered under the 6yr/70k powertrain warranty). If the shudder persists after reprogramming, the shop should inspect for a failing torque converter, worn clutch packs, or contaminated fluid and replace as needed. A transmission fluid service with the correct Mercon ULV is recommended at the same time.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Motorcraft MERCON ULV automatic transmission fluid XT-12-QULV, 1 quartOEMXT-12-QULV
Drain/fill a confirmed 8F35 that specifies MERCON ULV after fluid-condition and service diagnosis Fitment/availability: Live direct Add to Cart page identifies genuine Ford XT-12-QULV by exact part number and quart size. Confirm 2.0L 8F3…
- Genuine Ford JM5Z-7902-FTC 8F35 torque converterOEMJM5Z-7902-FTC
Replace a converter proven failed by post-programming 8F35 slip/pressure/contamination diagnosis Fitment/availability: Direct retailer item page identifies JM5Z-7902-FTC, Nautilus 2.0L/8F35 description, supersession of JM5Z-7902-B/-F, pr…
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Sources for this issue (4)
- 8F35 Transmission - Shudder/Buck/Jerk While Driving Up To 35 MPH - 2019-2021 Ford Edge & Lincoln Nautilus (TSB PDF)tsb
- 8F35 Transmission Shudder/Buck/Jerk - 2019-2021 Ford Edge & Lincoln Nautilusarticle
- 2019-2021 Lincoln Nautilus & Ford Edge Transmission Class Action Investigationforum
- 2019 Lincoln Nautilus Harsh Shifting Complaints - CarComplaintsarticle
P0700 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0700 mean on a Lincoln?
P0700 stands for "Transmission Control System Malfunction." P0700 is a general code indicating the transmission control module (TCM) has detected a fault somewhere in the transmission control system and has requested the check engine light be turned on. By itself it doesn't pinpoint the problem — it's an 'umbrella' code that tells you to look for additional, more specific transmission codes stored alongside it. The actual fault could be electrical, a sensor, a solenoid, or an internal transmission issue. You may notice harsh or delayed shifts, slipping, or the transmission going into a protective 'limp' mode. On Lincoln it is documented across 1 model: Nautilus.
What are the most common causes of P0700?
The most common causes of P0700 are: Stored companion transmission codes pointing to the real fault, Faulty shift solenoid or pressure control solenoid, Low, dirty, or degraded transmission fluid, Faulty transmission speed or input/output sensor, Wiring, connector, or ground problems at the transmission, Failing transmission control module (TCM), Internal transmission mechanical wear or clutch problems, Valve body fault or sticking valves. The specific cause varies by vehicle.
How much does it cost to fix P0700 on a Lincoln?
Repair costs vary widely with the root cause and Lincoln model; each issue on this page carries its own estimate where one is published.
Looking for P0700 on a different make?
View P0700 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.