What Does P3473 Mean?
The PCM has detected an open circuit or electrical discontinuity in the cylinder 10 intake valve deactivation control circuit. This prevents the system from deactivating cylinder 10 when required for fuel economy optimization.
Common Causes
35%
Broken or disconnected wiring in cylinder deactivation solenoid circuit
30%
Failed cylinder deactivation intake valve solenoid
20%
Corroded or damaged electrical connector at deactivation solenoid
10%
Open circuit within PCM output driver
5%
Mechanical failure of valve lifter preventing electrical circuit completion
Diagnostic Steps
1
Step 1: Inspect cylinder 10 intake valve deactivation solenoid connector and wiring for damage, corrosion, or disconnection
2
Step 2: Measure resistance across deactivation solenoid terminals with connector disconnected; compare to specifications
3
Step 3: Check continuity from PCM connector to solenoid connector; should show low resistance throughout circuit
4
Step 4: Verify PCM is providing switched ground or voltage signal using voltmeter during operation
5
Step 5: If electrical circuits are intact, inspect oil passages and lifter assembly for mechanical blockage or failure
Estimated Repair Cost
$150 - $900
Parts + labor, varies by vehicle and location
The PCM has detected an open circuit or electrical discontinuity in the cylinder 10 intake valve deactivation control circuit. This prevents the system from deactivating cylinder 10 when required for fuel economy optimization.
The most common cause of P3473 (Cylinder 10 Deactivation/Intake Valve Control Circuit/Open) is: Broken or disconnected wiring in cylinder deactivation solenoid circuit
Typical repair costs for P3473 range from $150 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle remains safe to drive. Fuel economy will be reduced as cylinder deactivation function is disabled. No immediate mechanical damage expected.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P3473 to identify the root cause.
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Quick Info
Category
Powertrain
System
Cylinder Deactivation System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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