Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
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A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P3402Cylinder 1 Deactivation Control Performance
Manufacturer communications
9Original wording in English
FORD
This article supersedes TSB 25-2487 to update the symptoms in the TSB title and issue, and update the parts list to include additional parts for the repair Some vehicles listed in the Model Section above may exhibit diagnostic trouble codes (DTCs) P3426, P3402, P3450, And/Or P3442 stored in the PCM. This may be due to a restrict…
FORD
Some vehicles listed in the Model Section above may exhibit diagnostic trouble codes (DTCs) P3426, P3402, P3450, and/or P3442 stored in the PCM. This may be due to a restriction in the cylinder deactivation solenoid oil feed tube.
FORD
Some 2020-2021 Escape and 2021 Bronco Sport vehicles equipped with 1.5L EcoBoost engines may experience an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P3402. This may be due to the cylinder 1 deactivation solenoid. To correct this condition, replace the cylinder deactivation solenoid with serv…
FORD
Some 2021 F-150 vehicles equipped with a 5.0L engine and built on or before 23-Apr-2021 may experience a runs rough, hesitation and/or a lack of power condition with an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P0301, P0304, P0306, P0307, P3402, P3426, P3442 and/or P3450 stored in the powe…
Check vehicle applicability
17A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.