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.
P1026 · Manufacturer communications
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
P1026 ← What does this code mean?15 Results
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 · 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 · 2020-05-07
Some 2019 Ranger vehicles built on or before 14-Jun-2019 may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P02EE, P02EF, P02F0, P02F1, P050A, P050B, P1026, and/or P051B stored in the powertrain control module (PCM). This may be due to various software parameters within the PCM. To correct the condition, follow the Service Procedure to reprogram the PCM.
FORD, LINCOLN · 2019-11-22
Some 2019-2020 Edge/Escape/Nautilus/Corsair vehicles equipped with 2.0L EcoBoost engines may exhibit low coolant, white smoke from the tailpipe, an over temperature warning in the instrument panel cluster (IPC), external coolant leaking, and/or illuminated MIL with DTCs P0217, P0401, P1026, P1285, P1299, P2196 or P2467 stored in the PCM. This may be due to an EGR Cooler that is leaking coolant into the engine intake and exhaust system. The EGR cooler should be inspected first to detect the presence of any internal leaks by a visual inspection and a pressure test as defined in the Workshop Manual (WSM). If any coolant is found leaking from the coolant chamber into the exhaust chamber, replace the EGR cooler. If no issues are detected with the EGR cooler, continue repair diagnosis using…
FORD, LINCOLN · 2019-02-06
Some 2015-2019 F150/Edge, 2016-2018 MKX, 2019 Nautilus and 2017-2019 Fusion/Continental vehicles equipped with a 2.7L engine may exhibit a malfunction indicator lamp (MIL) and/or wrench lamp with diagnostic trouble codes (DTCs) P0116, P0117, P0118, P0119, P0217, P0330, P1026, and/or P130D. This may be due to a engine coolant temperature (ECT) sensor connector which is not fully seated or damaged wiring between connectors C1064 and C1047 for F150 and C1016 and C1168 for Edge/MKX/Nautilus/Fusion/Continental vehicles. ECT sensors should not be replaced if damaged wiring is found at or near these connectors. For claiming, use causal part 12A699 and applicable labor operations in Section 10 of the Service Labor Time Standards (SLTS) Manual.
FORD, LINCOLN · 2017-11-08
Some 2015-2018 F150/Edge, 2016-2018 MKX and 2017-2018 Fusion, Continental vehicles equipped with a 2.7L engine may experience a malfunction indicator lamp (MIL) and/or wrench lamp with Diagnostic Trouble Codes (DTCs): P0116, P0117, P0118, P0119, P0217, P0330, P1026, and/or P130D. This may be due to a engine coolant temperature (ECT) sensor connector which is not fully seated or damaged wiring between connectors C1064 and C1047 for F150 and C1016 and C1168 for Edge/MKX/Fusion/Continental vehicles. ECT sensors should not be replaced if damaged wiring is found at or near these connectors. If an issue with the wiring is found use causal part 12A699.
PORSCHE · 2012-12-03
Concern: Diagnosis of Failed Camshaft Adjuster Element Information: The following fault codes may be stored in the DME when a camshaft adjuster element fails: Mass Air flow: P0068, P1074 Cylinder Misfire: P0300 Fuel Pressure: P1023, P1026, P1031, P053F Camshaft sensor: P0340 ? P0349 Camshaft adjustment: P000A, P0011, P000C, P0021 (92A Cayenne S/Turbo) (970 Panamera/S/Turbo)