Cylinder 6 Exhaust Valve Control Circuit Performance
Code P3446 indicates a performance issue in the exhaust valve control circuit for cylinder 6, typically found in engines with variable valve timing or cylinder deactivation systems. The powertrain control module (PCM) has detected that the actual position or response of the exhaust valve control solenoid does not match the commanded state, often due to electrical faults, mechanical binding, or oil flow problems. This can lead to reduced engine performance, increased emissions, and potential engine damage if ignored.
01. Most Common Causes
- Faulty exhaust valve control solenoid on cylinder 6
- Wiring or connector issues (open, short, corrosion) in the control circuit
- Low engine oil level or dirty oil affecting solenoid operation
- Engine mechanical issue (sticking valve, carbon buildup)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Rough idle or misfire on cylinder 6
- Reduced engine power and fuel economy
- Possible engine knocking or hesitation
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data; clear codes and test drive to confirm code returns.
Step 2: Visually inspect wiring and connector for cylinder 6 exhaust valve control solenoid for damage, corrosion, or loose connections.
Step 3: Test solenoid resistance with a multimeter (compare to specs); check for power and ground at the solenoid connector with ignition on.
Step 4: Check engine oil level and condition; perform a mechanical compression test on cylinder 6 to rule out valve issues.
04. Commonly Affected Makes
05. 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 damage to the catalytic converter or engine.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and simple repairs like replacing a solenoid or fixing wiring, but could be higher if internal engine work is needed.