Cylinder 6 Exhaust Valve Control Circuit/Open
Code P3445 indicates an open or malfunction in the exhaust valve control circuit for cylinder 6, typically found in engines with variable valve timing (VVT) or cylinder deactivation systems. This circuit controls the solenoid that actuates the exhaust valve lift or timing. An open circuit means there is a break in the wiring, connector, or solenoid coil, preventing proper valve operation. This can lead to reduced engine performance, misfires, and increased emissions.
1. Most Common Causes
- Faulty exhaust valve control solenoid for cylinder 6
- Open or shorted wiring in the solenoid circuit
- Corroded or damaged connector at the solenoid
- Engine control module (ECM) failure
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Rough idle or misfire on cylinder 6
- Reduced engine power and fuel economy
- Possible engine hesitation or stalling
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect wiring and connector for cylinder 6 exhaust valve solenoid for damage or corrosion.
Step 3: Measure resistance of the solenoid; compare to manufacturer specs (typically 10-30 ohms).
Step 4: Check for voltage and ground at the solenoid connector with the engine running.
Step 5: If wiring and solenoid are good, test the ECM output or replace the ECM.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause misfires, catalytic converter damage, and poor performance. Immediate diagnosis is advised.
How much does it cost to fix?▼
Repair costs range from $150 to $400, depending on whether it's a simple wiring fix or solenoid replacement. ECM replacement can be more expensive.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.