Cylinder 3 Exhaust Valve Control Circuit High
The P3424 code indicates that the powertrain control module (PCM) has detected a high voltage condition in the exhaust valve control circuit for cylinder 3. This circuit is responsible for controlling the exhaust valve timing or lift, often in engines with variable valve timing (VVT) or cylinder deactivation systems. A high voltage reading suggests a short to power, open circuit, or faulty component in the circuit.
01. Most Common Causes
- Faulty exhaust valve control solenoid for cylinder 3
- Short to power in the wiring or connector
- Open circuit in the exhaust valve control circuit
- Corroded or damaged connector pins
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Rough idle or misfire on cylinder 3
- Reduced engine power or performance
- Poor fuel economy
- Possible engine hesitation or stalling
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all codes and freeze frame data.
Step 2: Visually inspect the wiring and connector for cylinder 3 exhaust valve control solenoid for damage, corrosion, or loose connections.
Step 3: Test the exhaust valve control solenoid resistance with a multimeter and compare to manufacturer specs.
Step 4: Check for voltage at the solenoid connector with the ignition on; if voltage is higher than expected, trace the circuit for a short to power.
Step 5: If wiring and solenoid are okay, test the PCM output signal; if no signal, consider PCM failure.
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. Have it diagnosed promptly.
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. Parts cost around $20-$80 for the solenoid.