P3400Średni
Problem z dezaktywacją cylindrów – Bank 1. Układ wyłączania cylindrów wykrył nieprawidłowość w obwodzie sterowania zaworami Bank 1.
Układ napędowy
Sprawdź szczegóły →P3425
ŚredniCylinder 4 – open circuit in the cylinder deactivation intake valve control circuit. The PCM has detected incorrect voltage or resistance in the control circuit of the cylinder 4 deactivation valve.
OBD-II (EN): Cylinder 4 Deactivation Valve Control Circuit Malfunction
Code P3425 means the Powertrain Control Module (PCM) has detected an open circuit in the electrical circuit of the cylinder 4 deactivation valve. This can be caused by a faulty solenoid, a wiring problem, or a fault in the ECM module itself. Diagnosis by a specialist using a bidirectional scanner is recommended to precisely determine the cause of the fault.
Symptoms
Check Engine Light (MIL) illuminated on the dashboard. Loss of cylinder deactivation function (engine runs on all cylinders regardless of load). Increased fuel consumption due to lack of eco mode. Occasional vibrations or rough idle. Possible sporadic stumbling or misfire on cylinder 4.
Possible causes
Faulty or shorted cylinder 4 deactivation solenoid. Open or short circuit in the wiring harness supplying the deactivation valve circuit. Damaged electrical connector or corrosion on the valve plug. Communication error or fault in the engine control module (ECM/PCM). Outdated ECM software/calibration requiring an update. Low or contaminated engine oil hindering the hydraulic deactivation system.
Affected systems
Cylinder Deactivation SystemVariable Displacement Engine (VDS)Intake Valve ControlEngine Control Module (ECM/PCM)Engine Electrical / Wiring Harness
Related codes
Does code P3425 require professional diagnostics?
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.