Cylinder 10 Deactivation/Intake Valve Control Circuit/Open
Code P3473 indicates an open circuit in the cylinder deactivation or intake valve control circuit for cylinder 10. This system, often part of Active Fuel Management (AFM) or Variable Valve Timing (VVT), uses solenoids to control oil flow to valve lifters. An open circuit means the solenoid or its wiring has failed, preventing proper valve operation and causing the cylinder to remain active or deactivated incorrectly.
1. Most Common Causes
- Faulty or open cylinder 10 intake valve control solenoid
- Damaged, corroded, or disconnected wiring in the solenoid circuit
- Electrical connector with bent, corroded, or loose pins
- Short to ground or voltage in the solenoid harness
- Internal failure of the engine control module (ECM/PCM)
- Excessive circuit resistance due to poor splices or connections
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine misfire or rough idle
- Reduced fuel economy
- Possible hesitation or loss of power
3. Step-by-Step Diagnosis
Step 1: Scan for additional codes and record freeze frame data.
Step 2: Visually inspect the wiring and connector for cylinder 10 deactivation solenoid for damage or corrosion.
Step 3: Use a multimeter to test the solenoid resistance (typically 20-30 ohms) and check for continuity in the circuit.
Step 4: If wiring is good, replace the cylinder 10 deactivation solenoid.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause engine misfire, reduced performance, and potential catalytic converter damage. Short trips to a repair shop are acceptable.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on the vehicle and shop rates. The solenoid itself is often inexpensive.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.