What Does P3468 Mean?
The PCM has detected voltage in the cylinder 9 intake valve control circuit that exceeds normal operating specifications. This typically indicates a short to power in the wiring or a failed solenoid with internal short.
Common Causes
40%
Short to voltage in wiring harness between PCM and intake valve solenoid
30%
Failed intake valve control solenoid with internal short to power
15%
Damaged wiring rubbing against hot exhaust or engine components
10%
PCM internal driver circuit failure causing voltage feedback
5%
Connector pin cross-contamination or moisture causing voltage bridging
Diagnostic Steps
1
Step 1: Disconnect intake valve control solenoid and check for voltage at harness connector with key on; should show zero volts
2
Step 2: With solenoid disconnected, measure resistance to ground and to power on control circuit; high resistance indicates proper isolation
3
Step 3: Inspect wiring harness routing for contact with heat sources, sharp edges, or moving components
4
Step 4: Measure solenoid coil resistance and perform insulation test to case; low resistance to ground indicates shorted solenoid
5
Step 5: If wiring and solenoid test normal, perform PCM output driver test using scan tool bi-directional controls
Estimated Repair Cost
$150 - $850
Parts + labor, varies by vehicle and location
The PCM has detected voltage in the cylinder 9 intake valve control circuit that exceeds normal operating specifications. This typically indicates a short to power in the wiring or a failed solenoid with internal short.
The most common cause of P3468 (Cylinder 9 Deactivation/Intake Valve Control Circuit High) is: Short to voltage in wiring harness between PCM and intake valve solenoid
Typical repair costs for P3468 range from $150 to $850, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Cylinder 9 intake valve may be stuck in one position, causing rough running, misfires, or reduced power. Generally safe to drive short distances but should be repaired promptly to prevent catalytic converter damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P3468 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
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
