NHTSA ID Number: 10198582
Manufacturer Communication Number: TSB 21-2168
Summary
Some 2018-2020 F-150 vehicles equipped with a 2.7L EcoBoost engine may exhibit an illuminated malfunction indicator lamp (MIL) and/or Engine Coolant Over Temperature warning with diagnostic trouble codes (DTCs) P0116, P0117, P0118, P0119, P0128, P0217, P0330, P1026, and/or P1299. This condition may be caused by an intermittent drop in the engine coolant temperature (ECT) voltage. To correct this condition, replace the heater hose with the new relocated ECT and install a jumper harness.
Model:
2018-2020 F-150
Engine: 2.7L EcoBoost
Issue: Some 2018-2020 F-150 vehicles equipped with a 2.7L EcoBoost engine may exhibit an illuminated malfunction indicator lamp (MIL) and/or Engine Coolant Over Temperature warning with diagnostic trouble codes (DTCs) P0116, P0117, P0118, P0119, P0128, P0217, P0330, P1026 and/or P1299. This condition may be caused by an intermittent drop in the engine coolant temperature (ECT) voltage. To correct the condition, replace the heater hose with the new relocated ECT and install a jumper harness.
Action: Follow the Service Procedure steps to correct the condition on vehicles that meet all of the following criteria:
- 2018-2020 F-150
- 2.7L EcoBoost
- Illuminated malfunction indicator lamp (MIL) and/or Engine Coolant Over Temperature warning with DTCs P0116, P0117, P0118, P0119, P0128, P0217, P0330, P1026 and/or P1299
NOTE: Part quantity refers to the number of that service part number required, which may be different than the number of individual pieces. Service part numbers contain 1 piece unless otherwise stated. “As Needed” indicates the part is required but the number may vary or is not a whole number; parts can be billed out as non-whole numbers, including less than 1.
Parts
| Service Part Number | Quantity | Description | |
| ML3Z-14A411-H | 1 | ECT Relocation Kit | – |
VC-3-B
Ford Genuine Fluid VC-13-G Yellow Concentrated Antifreeze/Coolant - 1 Gallon
Last update on 2026-06-18 / Affiliate links / Images from Amazon Product Advertising API | As Needed | Motorcraft® Orange Concentrated Antifreeze/Coolant (All Markets Except Canada) | – |
| CVC-3-B2 | As Needed | Motorcraft® Orange Concentrated Antifreeze/Coolant (Canada Only) | – |
| VC-13-G
Ford Genuine Fluid VC-13-G Yellow Concentrated Antifreeze/Coolant - 1 Gallon
Last update on 2026-06-18 / Affiliate links / Images from Amazon Product Advertising API | As Needed | Motorcraft® Yellow Concentrated Antifreeze/Coolant (All Markets Except Canada) | – |
CVC-13-G | As Needed | Motorcraft® Yellow Concentrated Antifreeze/Coolant (Canada Only) | – |
| Obtain Locally | 4 | Zip Tie | 4 Pieces Required |
Service Procedure
1. Drain the cooling system. Refer to Workshop Manual (WSM), Section 303-03A.
2. Replace the heater hose with the new part containing the ECT sensor. (Figure 1)
Figure 1
3. Disconnect connector C1047 and connect the jumper harness to the connectors.
4. Secure the connectors with retainers. (Figure 2)
Figure 2
5. Route the harness under the positive crankcase ventilation (PCV) and evaporative emissions (EVAP) lines, then across the engine and connect to the ECT sensor. (Figure 3)
Figure 3
6. Clip the harness to the heater hose. (Figure 4)
Figure 4
7. Using retainers, secure the jumper harness to the engine harness in the 3 locations shown in Figure 5.
Figure 5
8. Fill the cooling system. Refer to WSM, Section 303-03A.
9. Reprogram the PCM using the latest software level of the appropriate Ford diagnostic scan tool. If the Ford diagnostic scan tool screen displays a question that includes “P552_27L_Overheat$Q”, this is an indication that the Ford diagnostic scan tool is not at the latest software level and needs to be updated to the latest software level.
NOTE: Advise the customer this vehicle is equipped with an adaptive transmission shift strategy which allows the vehicle’s computer to learn the transmission’s unique parameters and improve shift quality. When the adaptive strategy is reset, the computer will begin a relearning process. This relearning process may result in firmer than normal upshifts and downshifts for several days.
3 Affected Products
Vehicle
| MAKE | MODEL | YEAR |
| FORD | F-150 | 2018-2020 |
1 Associated Document
Manufacturer Communications
21-2168
01 June 2021
MC-10198582-0001.pdf 393.886KB
- Compatible With Vehicle Type: marine-personal-craft
- 1 GALLON ENGINE ANTIFREEZE/COOLANT: Fully compatible with other extended life antifreeze/coolants. This item contains a bittering agent called Denatonium Benzoate.
- PROTECTS: Advanced formulation prevents rust & corrosion protecting all engine cooling system components
- DESIGNED FOR NORTH AMERICAN VEHICLES: Recommended for use with Ford, Chrysler, and GM vehicles that require an orange organic acid technology formula
- GUARANTEED: When installed as part of a complete flush and fill, PEAK guarantees this coolant will provide service life protection of up to 400,000 miles or 15 years.
- 50/50 PREDILUTED FOR QUICK TOP OFFS: Already prediluted to make topping off your cooling system a breeze
- The information below is per-pack only
- Compatible With Vehicle Type: marine-personal-craft
- Yellow-colored, longer-life, ethylene glycol-based antifreeze/coolant for use in gasoline and diesel engines
- Provides year-round antifreeze, anti-boil and corrosion protection
- 50/50 mixture of coolant and distilled water provides freeze protection down to -34°F (-37°C) and boiling protection up to 265°F (129°C)
- Do not mix different colors or types of coolant in your vehicle
- Contains a bittering agent
- Unsurpassed freeze protection and anti-boil performance outperforms industry standards
- Organic acid technology resists rust, scale & corrosion while protecting all cooling system metals (including aluminum)
- High-quality additives protect against leaks and won’t harm gaskets, hoses, plastics or original vehicle finish
- Pre-mixed orange formula is ready-to-use in a 50/50 ratio with deionized water to protect all modern engine components from winter freezing (-34F) and summer boiling (265F).
- 5 year/150,000 mile guarantee protects against engine failure caused by freeze-ups or boil-overs
Last update on 2026-06-01 / Affiliate links / Images from Amazon Product Advertising API
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Warranty Status: Eligible under provisions of New Vehicle Limited Warranty (NVLW)/Emissions Warranty/Service Part Warranty (SPW)/Special Service Part (SSP)/Extended Service Plan (ESP) coverage. Limits/policies/prior approvals are not altered by a TSB. NVLW/Emissions Warranty/SPW/SSP/ESP coverage limits are determined by the identified causal part and verified using the OASIS part coverage tool. Labor Times Description Operation No. Time 2018-2020 F150 2.7L EcoBoost: Retrieve DTCs Relocate The ECT Sensor Following The Service Procedure (Do Not Use With Any Other Labor Operations) 212168A 1.3 Hrs. Repair/Claim Coding Causal Part: 12A648 Condition Code: 42
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