What Does P3425 Mean?
The PCM detected an open circuit or complete loss of continuity in the cylinder 4 intake valve deactivation control circuit. This prevents proper operation of cylinder 4 intake valve deactivation system.
Common Causes
35%
Broken or disconnected wiring in intake valve control circuit
30%
Failed cylinder 4 intake valve control solenoid (internal open)
20%
Corroded or damaged electrical connector terminals
10%
Blown fuse or fusible link in solenoid power supply circuit
5%
PCM connector terminal damage or pushed-back pins
Diagnostic Steps
1
Step 1: Check all fuses related to variable valve control system for proper operation
2
Step 2: Inspect cylinder 4 intake valve solenoid connector for damage and proper connection
3
Step 3: Disconnect solenoid and measure resistance; infinite resistance confirms open circuit
4
Step 4: Test continuity from PCM connector to solenoid connector throughout entire circuit
5
Step 5: Inspect PCM connector for terminal corrosion, bent pins, or moisture intrusion
Estimated Repair Cost
$150 - $700
Parts + labor, varies by vehicle and location
The PCM detected an open circuit or complete loss of continuity in the cylinder 4 intake valve deactivation control circuit. This prevents proper operation of cylinder 4 intake valve deactivation system.
The most common cause of P3425 (Cylinder 4 Deactivation/Intake Valve Control Circuit/Open) is: Broken or disconnected wiring in intake valve control circuit
Typical repair costs for P3425 range from $150 to $700, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive but fuel economy and emissions will be negatively affected. Cylinder deactivation system will not function on cylinder 4.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P3425 to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing/Cylinder Deactivation System
Difficulty
Type
Generic (SAE)
Recommended Tools
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