What Does P3445 Mean?
The ECM has detected an open or general malfunction in the cylinder 6 exhaust valve control solenoid circuit. This solenoid controls the exhaust valve lifter for cylinder 6 as part of the cylinder deactivation system. An open circuit means the ECM cannot energize the solenoid to deactivate the exhaust valve on cylinder 6.
Common Causes
35%
Open circuit in the wiring between the ECM and cylinder 6 exhaust valve solenoid
30%
Failed cylinder 6 exhaust valve solenoid with open coil winding
20%
Corroded or damaged connector pins at VLOM or ECM connector
15%
ECM internal open in the cylinder 6 exhaust valve driver circuit
Diagnostic Steps
1
Step 1: Visually inspect the VLOM connector for the cylinder 6 exhaust valve solenoid. Check for disconnected plugs, broken wires, or visible damage.
2
Step 2: Measure the solenoid coil resistance — expect 5-12 ohms. An OL reading confirms an open coil requiring solenoid replacement.
3
Step 3: With the solenoid disconnected, command it ON using the scan tool and verify battery voltage is present at the harness connector.
4
Step 4: Test continuity of both wires from the ECM connector to the VLOM connector. Repair any opens found.
5
Step 5: If all tests pass, verify solenoid mechanical operation by applying 12V directly. If functional but the code persists, suspect ECM driver failure.
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
The ECM has detected an open or general malfunction in the cylinder 6 exhaust valve control solenoid circuit. This solenoid controls the exhaust valve lifter for cylinder 6 as part of the cylinder deactivation system. An open circuit means the ECM cannot energize the solenoid to deactivate the exhau...
The most common cause of P3445 (Cylinder 6 Exhaust Valve Control Circuit/Open) is: Open circuit in the wiring between the ECM and cylinder 6 exhaust valve solenoid
Typical repair costs for P3445 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive. Cylinder deactivation will be disabled, resulting in decreased fuel economy. No immediate mechanical risk.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P3445 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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