P1299 · Manufacturer communications

FORD · 2026-09-01

Some 2023-2025 Escape vehicles built on or before 16-Sep-2024 equipped with 1.5L EcoBoost engine may exhibit an "Engine Coolant Over-Temperature" warning message displayed in the IPC and an illuminated MIL with DTCs P1285 and/or P1299 stored in the powertrain control module (PCM) during hard acceleration or under high load conditions. This may be due to machining chips trapped in the cylinder head causing a potential blockage in the coolant passage near the cylinder head temperature 2 (CHT2) port. To diagnose this condition, start the vehicle and idle for 15 minutes. Perform a road test at a temperature above -20°C (-4°F) and apply wide-open throttle (WOT) hard accelerations in rapid succession. If the concern cannot be replicated, drain and refill the coolant system. If the concern can…

FORD · 2026-05-06

This bulletin supersedes 24-2441. Reason for update: consolidation of prior bulletins and an update the Service Procedure to diagnose and replace the cylinder head temperature (CHT) sensor with an updated version. Some of the vehicles listed in the Model Statement above may exhibit all of the following conditions: * Illuminated power train malfunction (wrench) indicator/malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P1299, P1285 and/or P2C39 stored in the powertrain control module (PCM). * "Engine Over-Temperature" and/or Service Vehicle Soon warning message(s) displayed in the instrument panel cluster (IPC) This may be due to the software in the PCM and/or the CHT sensor. Note: The vehicle's cooling fan will operate normally with no loss of engine coolant.

FORD · 2026-02-23

Some of the vehicles listed in the Model statement above may exhibit a loss of engine coolant at the heater hose assembly near the engine cooling fan. The vehicle may also have diagnostic trouble codes (DTC) P1299 and/or P1285 stored in the powertrain control module (PCM). This may be due to an incorrectly indexed hose connection at the thermostat housing causing contact with the cooling fan.

FORD · 2025-10-28

Some 2024-2025 F-150 vehicles equipped with a 2.7L engine, built on or after 27-Aug-2024 may exhibit an illuminated powertrain malfunction (wrench) indicator with diagnostic trouble codes (DTCs) P1285 and/or P1299 stored in the powertrain control module (PCM) and Engine Coolant Over Temperature and/or Service Vehicle Soon warning message displayed on the instrument panel cluster (IPC). This may be due to the cylinder head temperature (CHT) sensor. Follow the Workshop Manual (WSM) 303-03A Engine Cooling - 2.7L EcoBoost > Diagnosis and Testing > Engine Temperature Pinpoint Test (PPT) DL1-DL10. If P1285 and/or P1299 is still present, replace the CHT sensor. Refer to WSM, Section 303-14A Electronic Engine Controls > Removal and Installation. For claiming use causal part 6G004 and labor…

FORD · 2025-10-10

Some 2023-2025 Escape vehicles built on or before 16-Sep-2024 equipped with 1.5L EcoBoost engine may exhibit an "Engine Coolant Over-Temperature" warning message displayed in the IPC and an illuminated MIL with DTCs P1285 and/or P1299 stored in the powertrain control module (PCM) during hard acceleration or under high load conditions. This may be due to machining chips trapped in the cylinder head causing a potential blockage in the coolant passage near the cylinder head temperature 2 (CHT2) port. To diagnose this condition, start the vehicle and idle for 15 minutes. Perform a road test at a temperature above -20°C (-4°F) and apply wide-open throttle (WOT) hard accelerations in rapid succession. If the concern cannot be replicated, drain and refill the coolant system. If the concern can…

FORD · 2025-08-04

Some 2023-2025 Escape vehicles built on or before 16-Sep-2024 equipped with 1.5L EcoBoost engine may exhibit an "Engine Coolant Over-Temperature" warning message displayed in the IPC and an illuminated MIL with DTCs P1285 and/or P1299 stored in the powertrain control module (PCM) during hard acceleration or under high load conditions. This may be due to machining chips trapped in the cylinder head causing a potential blockage in the coolant passage near the cylinder head temperature 2 (CHT2) port. To diagnose this condition, start the vehicle and idle for 15 minutes. Perform a road test at a temperature above -20°C (-4°F) and apply wide-open throttle (WOT) hard accelerations in rapid succession. If the concern cannot be replicated, drain and refill the coolant system. If the concern can…

FORD · 2025-07-24

Some 2023-2025 Escape vehicles built on or before 16-Sep-2024 equipped with 1.5L EcoBoost engine may exhibit an "Engine Coolant Over-Temperature" warning message displayed in the IPC and an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P1285 and/or P1299 stored in the powertrain control module (PCM) during hard acceleration or under high load conditions. This may be due to machining chips trapped in the cylinder head causing a potential blockage in the coolant passage near the cylinder head temperature 2 (CHT2) port. To diagnose this condition, start the vehicle and idle for 15 minutes. Perform a road test at a temperature above -20°C (-4°F) and apply wide-open throttle (WOT) hard accelerations in rapid succession. If the concern cannot be replicated,…

FORD · 2025-05-16

Some of the vehicles listed in the Model statement above may exhibit an incorrectly illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P1299, P1026, and P2C39.

FORD · 2024-12-20

Some 2024 F-150 vehicles equipped with a 2.7L EcoBoost engine may exhibit an engine over-temperature warning displayed in the IPC and an illuminated MIL with DTCs P1299 and/or P2C39 stored in the PCM.

FORD, LINCOLN · 2024-11-19

Some 2025 Explorer/Aviator vehicles built on or before 15-Oct-2024 with a 2.3L/3.0L EcoBoost engine may exhibit an engine over-temperature warning displayed in the IPC and an illuminated MIL with DTC P1299 along with P2C38 or P2C39 stored in the PCM.

FORD · 2024-08-07

Some 2019-2020 Transit Connect vehicles may exhibit a false overheat condition and illuminated malfunction indicator lamp (MIL) with DTCs P1299 and/or P0217 present. Prior to any diagnostics, disconnect the generator electrical connector C1558B and generator positive cable C1558A then secure properly for testing. If the concern is no longer present when the electrical connections are removed, replace the generator.

FORD · 2024-01-30

Some 2023-2024 Escape vehicles built on or before 11-Jan-2024 equipped with 1.5L engines may exhibit an Engine Coolant Over-Temperature Warning message displayed in the IPC and an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P1285 and/or P1299 stored in the powertrain control module (PCM) during hard acceleration or under high load conditions. This may be due to machining chips trapped in the cylinder head causing a potential blockage in the coolant passage near the cylinder head temperature (CHT2) port. To diagnose this condition, start the vehicle and idle for 15 minutes. Perform a road test at a temperature above -20°C (-4°F) and apply wide-open throttle (WOT) hard accelerations in rapid succession. If the concern can not be replicated, drain and…

FORD · 2024-01-08

Some 2023 Escape vehicles equipped with 1.5L engines may exhibit an Engine Coolant Over-Temperature Warning message displayed in the instrumental panel cluster (IPC) and an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P1285 and/or P1299 stored in the powertrain control module (PCM) during hard acceleration or under high load conditions. Ford is aware of the concern and this condition does not affect vehicle durability and no additional diagnosis or service is required for this condition at this time. Inform customers that they can continue to drive the vehicle and engineering is currently working on a solution for this condition that is expected in Q1 of 2024. Replacement of the cylinder head temperature (CHT) sensor may not resolve this condition.…

FORD · 2023-10-12

Some 2022-2023 Explorer vehicles with 2.3L engine built on or before 20-Jul-2023 may exhibit an intermittent malfunction indicator light (MIL) with diagnostic trouble code (DTC) P1026 and/or P1299 present in the powertrain control module (PCM) and an engine over-temperature message displayed on the instrument panel cluster (IPC) after a cold engine start. The vehicle will also exhibit reduced performance when it enters fail safe cooling open loop mode. If the engine is not overheating, clear the DTCs to reset the fail safe cooling open loop mode. Start and idle the engine while viewing coolant flow at the top inner (engine side) degas bottle hose port through the semitransparent top. If there is no coolant flow, replace the L1MZ-8A365-AAD engine-to-degas bottle hose. If if there is any…

FORD · 2023-06-30

Some 2022-2023 Explorer vehicles equipped with a 2.3L engine may exhibit an intermittent malfunction indicator light (MIL) with diagnostic trouble code (DTC) P1026 and/or P1299 present in the powertrain control module (PCM) and an engine over-temperature message displayed on the instrument panel cluster (IPC) after a cold engine start. The vehicle will also exhibit reduced performance when it enters fail safe cooling open loop mode. If the engine is not overheating, clear the DTCs to reset the fail safe cooling open loop mode. Start and idle the engine while viewing coolant flow at the top inner (engine side) degas bottle hose port through the semitransparent top. If there is no coolant flow, replace the L1MZ-8A365-AAD engine-to-degas bottle hose. If if there is any coolant flow, return…

FORD · 2023-05-11

Some 2022-2023 Explorer vehicles equipped with a 2.3L engine may exhibit an intermittent malfunction indicator light (MIL) with diagnostic trouble code (DTC) P1026 and/or P1299 present in the powertrain control module (PCM) and an engine over-temperature message displayed on the instrument panel cluster (IPC) after a cold engine start. The vehicle will also exhibit reduced performance when it enters fail safe cooling open loop mode. If the engine is not overheating, clear the DTCs to reset the fail safe cooling open loop mode. Start and idle the engine while viewing coolant flow at the top inner (engine side) degas bottle hose port through the semitransparent top. If coolant flow is blocked, replace the L1MZ-8A365-AAD engine-to-degas bottle hose. If flow is steady, return to Workshop…

FORD · 2023-02-01

Some 2022-2023 Explorer vehicles equipped with a 2.3L engine may exhibit an intermittent check engine light on with diagnostic trouble code (DTC) P1026 and/or P1299 present in the powertrain control module (PCM) and an engine over-temperature message displayed on the instrument panel cluster (IPC) after a cold start in cold (at or below freezing) ambient temperatures. The vehicle may also enter fail safe cooling open loop mode when this concern occurs. If the engine does not show any obvious signs of overheating and Workshop Manual, Section 303-03A diagnostics are inconclusive, clear the DTCs to reset the fail safe cooling open loop mode. Inform the customer that Ford is currently investigating this concern and that they can continue to drive the vehicle. Monitor OASIS for further updates.

FORD · 2022-08-15

Some 2014-2019 Fusion vehicles built on or before 10-Jun-2019 and 2017-2019 Escape vehicles built on or before 08-Apr-2019 equipped with a 1.5L EcoBoost engine may exhibit low coolant level, white exhaust smoke and/or runs rough condition with or without an illuminated malfunction indicator light (MIL) with only diagnostic trouble codes (DTCs) P0300, P0301-P0304, P0316, P0217, P1285 and/or P1299 stored in powertrain control module (PCM). This may be due to coolant intrusion into the cylinder. To resolve the condition, follow the Service Procedure to replace the short block and head gasket.

FORD, LINCOLN · 2022-06-10

Some 2015-2018 Edge and 2017-2019 Fusion/MKZ/Escape/MKC vehicles equipped with a 2.0L EcoBoost engine may exhibit a low coolant level, white exhaust smoke and/or a runs rough condition with or without an illuminated malfunction indicator lamp (MIL). Diagnostic trouble codes (DTCs) may include P0300, P0301-P0304, P0316, P0217, P1285 and/or P1299 stored in powertrain control module (PCM). This may be due to coolant intrusion into the cylinder. To correct the condition, follow the Service Procedure to replace the long block engine assembly.

FORD · 2022-06-09

Certain 2017-2019 Model Year Fusion and Escape Vehicles Equipped with a 1.5L GTDI Engine – Short Block Replacement After Coolant Intrusion. In some of the affected vehicles the 1.5L EcoBoost engine may exhibit a low coolant level, white exhaust smoke and/or may run in a rough condition with or without an illuminated malfunction indicator light (MIL) with only diagnostic trouble codes (DTCs) P0300, P0301-P0304, P0316, P0217, P1285 and/or P1299 stored in powertrain control module (PCM). This may be due to coolant intrusion into a cylinder bore.

FORD · 2022-04-15

Some 2014-2019 Fusion vehicles built on or before 10-Jun-2019 and 2017-2019 Escape vehicles built on or before 08-Apr-2019 equipped with a 1.5L EcoBoost engine may exhibit low coolant level, white exhaust smoke and/or runs rough condition with or without an illuminated malfunction indicator light (MIL) with only diagnostic trouble codes (DTCs) P0300, P0301-P0304, P0316, P0217, P1285 and/or P1299 stored in powertrain control module (PCM). This may be due to coolant intrusion into the cylinder. To resolve the condition, follow the Service Procedure to replace the short block and head gasket.

FORD, LINCOLN · 2022-04-15

Some 2015-2018 Edge and 2017-2019 Fusion/MKZ/Escape/MKC vehicles equipped with a 2.0L EcoBoost engine may exhibit a low coolant level, white exhaust smoke and/or a runs rough condition with or without an illuminated malfunction indicator lamp (MIL). Diagnostic trouble codes (DTCs) may include P0300, P0301-P0304, P0316, P0217, P1285 and/or P1299 stored in powertrain control module (PCM). This may be due to coolant intrusion into the cylinder. To correct the condition, follow the Service Procedure steps to replace the long block engine assembly.

FORD, LINCOLN · 2021-12-07

Some 2021 Escape/Corsair 2.5L PHEV vehicles may exhibit an illuminated MIL with DTCs P2183 and/or P26C1 present. The vehicle may also exhibit an engine overheat message in the instrument panel cluster. Engineering is aware of this concern and is working on a solution. Continue with checking the engine coolant level, inspect the cabin heater coolant temperature sensor (ECT sensor 2) connector for contamination and perform Workshop Manual (WSM), Section 412-00 pinpoint test AQ. If no concern is found and the vehicle does not exhibit DTC P1285 or P1299, clear the DTCs. If DTCs P1285 or P1299 are present, perform normal WSM diagnosis and repair. Inform customers that Ford is working on a resolution and that the vehicle is safe to drive. Monitor OASIS for updates. Once the solution becomes…

FORD · 2021-09-09

Some 2014-2019 Fusion vehicles built on or before 10-Jun-2019 and 2017-2019 Escape vehicles built on or before 08-Apr-2019 equipped with a 1.5L EcoBoost engine may exhibit low coolant level, white exhaust smoke and/or runs rough condition with or without an illuminated malfunction indicator light (MIL) with only diagnostic trouble codes (DTCs) P0300, P0301-P0304, P0316, P0217, P1285 and/or P1299 stored in powertrain control module (PCM). This may be due to coolant intrusion into the cylinder. To resolve the condition, follow the Service Procedure to replace the short block and head gasket.

FORD · 2021-06-02

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.

FORD, LINCOLN · 2020-12-18

Some 2020 Explorer/Aviator vehicles equipped with a 2.3L/3.0L 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, P1299, and/or P130D. This may be due to the engine coolant temperature (ECT) sensor or ECT sensor wiring harness. For 2.3L vehicles, replace the ECT sensor and pigtail wiring connector (GU2Z-14S411-KA). For 3.0L vehicles, replace the ECT and knock sensor. To aid with the engineering investigation, do not disconnect the wiring connector from the ECT sensor during disassembly. Leave the connector on the sensor in case parts are called back for analysis.

FORD, LINCOLN · 2020-07-20

Some 2020 Explorer/Aviator vehicles equipped with a 3.0L 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, P1299, and/or P130D. This may be due to the engine coolant temperature (ECT) sensor or ECT sensor wiring harness. To correct the condition, replace the ECT and knock sensor. To aid with the engineering investigation, do not disconnect the wiring connector from the ECT sensor during disassembly. Leave the connector on the sensor in case parts are called back for analysis.

FORD, LINCOLN · 2020-07-10

Some 2019-2020 Edge/Nautilus vehicles equipped with a 2.0L EcoBoost engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P0128, P0217, P044C, P1026, P1285, P1299, P139A and/or P2457 stored in the powertrain control module (PCM). The vehicle may also exhibit low coolant level, white smoke from the tailpipe, an over temperature warning in the instrument panel cluster (IPC), and/or an external coolant leak. This may be due to the exhaust gas recirculation (EGR) cooler and/or settings in the PCM software. To resolve the condition, inspect the EGR cooler and/or update the PCM software.

FORD, LINCOLN · 2020-07-10

Some 2015-2020 F150/Edge/Fusion, 2016-2018 MKX, 2019-2020 Nautilus, and 2017-2020 Continental vehicles equipped with 2.7L EcoBoost engines 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, P1299, and/or P130D. This may be due to the engine coolant temperature (ECT) sensor or knock sensor wiring harness. To correct the condition, replace the 12A648 ECT sensor and 12A699 knock sensor. Do not disconnect the ECT sensor from the knock sensor harness in case parts are called back for analysis. For claiming, use causal part 12A699 and applicable labor operations in Section 10 of the Service Labor Time Standards (SLTS) Manual.

FORD · 2020-04-02

Some 2014-2019 Fusion vehicles built on or before 10-Jun-2019 and 2017-2019 Escape vehicles built on or before 08-Apr-2019 equipped with a 1.5L EcoBoost engine may exhibit low coolant level, white exhaust smoke and/or runs rough condition with or without an illuminated malfunction indicator light (MIL) with only diagnostic trouble codes (DTCs) P0300, P0301-P0304, P0316, P0217, P1285 and/or P1299 stored in powertrain control module (PCM). This may be due to coolant intrusion into the cylinder. To resolve the condition, follow the Service Procedure to replace the short block and head gasket.