Cylinder 5 Exhaust Valve Control Circuit/Open
Code P3437 indicates an open or malfunction in the exhaust valve control circuit for cylinder 5. This circuit is part of the variable valve timing (VVT) system, which adjusts valve timing for optimal performance and emissions. An open circuit means the powertrain control module (PCM) detects no continuity or abnormal resistance in the solenoid or wiring, preventing proper valve actuation. This can cause rough idle, misfires, reduced power, and increased emissions.
01. Most Common Causes
- Faulty exhaust valve control solenoid on cylinder 5
- Open or shorted wiring in the control circuit
- Corroded or damaged connector at the solenoid
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light on
- Rough idle or engine misfire
- Reduced engine power and acceleration
- Poor fuel economy
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm code P3437 and check for related codes.
Step 2: Visually inspect the wiring and connector at cylinder 5 exhaust valve solenoid for damage or corrosion.
Step 3: Measure resistance of the solenoid; compare to manufacturer specs (typically 6-12 ohms).
Step 4: Check for voltage and ground at the solenoid connector with the ignition on.
Step 5: If wiring and solenoid are okay, test PCM output; replace PCM if necessary.
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 misfires, reduced performance, and potential catalytic converter damage. Seek repair soon.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, including parts (solenoid $50-$150) and labor (1-2 hours). Wiring repairs may be less, PCM replacement more.