Cylinder 5 Deactivation/Intake Valve Control Circuit/Open
Code P3433 indicates an open or malfunction in the intake valve control circuit for cylinder 5's deactivation system. This system uses oil pressure to disable the intake valve, improving fuel economy under light load. An open circuit prevents the valve from deactivating, causing the engine control module (ECM) to detect a fault. Common causes include a faulty valve actuator solenoid, wiring issues, low oil level, or a clogged oil passage.
01. Most Common Causes
- Faulty cylinder deactivation solenoid for cylinder 5
- Open or shorted wiring in the solenoid circuit
- Low engine oil level or pressure
- Clogged oil passages to the deactivation mechanism
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- Engine misfire or rough idle
- Possible loss of power
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Inspect wiring and connector for cylinder 5 deactivation solenoid for damage or corrosion.
Step 3: Check engine oil level and condition; top off or change if necessary.
Step 4: Test solenoid resistance with a multimeter; compare to specs (typically 10-30 ohms).
Step 5: If solenoid and wiring are OK, check for oil pressure and passage blockages.
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 may cause engine misfire, reduced performance, and potential damage to the catalytic converter.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on whether it's a simple wiring fix or solenoid replacement.