What Does P3474 Mean?
The PCM detects that cylinder 10's intake valve deactivation system is not performing as expected. The system may be responding too slowly, incompletely, or erratically to deactivation commands.
Common Causes
35%
Low oil pressure or contaminated engine oil affecting hydraulic lifter operation
30%
Worn or sticky cylinder deactivation lifter for cylinder 10
15%
Restricted oil passages to cylinder deactivation system
12%
Weak or intermittent deactivation solenoid
8%
Incorrect valve lash or mechanical timing issue
Diagnostic Steps
1
Step 1: Check engine oil level and condition; verify oil meets manufacturer specifications and is not contaminated or degraded
2
Step 2: Measure engine oil pressure at idle and operating temperature; compare to specifications
3
Step 3: Monitor cylinder deactivation solenoid operation with scan tool while commanding activation/deactivation cycles
4
Step 4: Inspect lifter assembly for cylinder 10 for mechanical wear, sticking, or damage requiring valve cover removal
5
Step 5: Verify oil feed passages to cylinder 10 lifter are clear and perform oil pressure test at lifter gallery if accessible
Estimated Repair Cost
$200 - $1,500
Parts + labor, varies by vehicle and location
The PCM detects that cylinder 10's intake valve deactivation system is not performing as expected. The system may be responding too slowly, incompletely, or erratically to deactivation commands.
The most common cause of P3474 (Cylinder 10 Deactivation/Intake Valve Control Circuit Performance) is: Low oil pressure or contaminated engine oil affecting hydraulic lifter operation
Typical repair costs for P3474 range from $200 to $1,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive but fuel economy will suffer. Prolonged operation may cause increased wear on cylinder deactivation components.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P3474 to identify the root cause.
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Quick Info
Category
Powertrain
System
Cylinder Deactivation System
Difficulty
Type
Generic (SAE)
Recommended Tools
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