Cylinder 10 Deactivation/Intake Valve Control Circuit/Open
Code P3473 indicates an open or malfunction in the intake valve control circuit for cylinder 10's deactivation system. This circuit is part of the cylinder deactivation technology (e.g., GM's Active Fuel Management or Chrysler's Multi-Displacement System) that shuts down cylinders to improve fuel economy. An open circuit means the powertrain control module (PCM) detects no continuity in the solenoid or wiring, preventing proper valve operation. This can cause cylinder 10 to remain active or inactive at the wrong times, leading to misfires, rough idle, and reduced performance.
01. Most Common Causes
- Faulty cylinder deactivation solenoid on cylinder 10
- Open or shorted wiring in the intake valve control circuit
- Corroded or loose electrical connector at the solenoid
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Rough idle or misfire on cylinder 10
- Reduced fuel economy
- Engine vibration or hesitation during acceleration
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data to confirm P3473 and check for related codes.
Step 2: Visually inspect the wiring and connector at cylinder 10's deactivation solenoid for damage, corrosion, or loose pins.
Step 3: Use a multimeter to test the solenoid resistance (typically 10-30 ohms) and check for continuity in the circuit from PCM to solenoid.
Step 4: If wiring and solenoid are good, test the PCM output signal with a scan tool or oscilloscope to verify command.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances. The engine may run rough, misfire, or stall, potentially causing catalytic converter damage or other issues.
How much does it cost to fix?▼
Repair costs typically range from $50 to $150 for a solenoid replacement, plus diagnostic time. Wiring repairs may be less, but PCM replacement can exceed $500.