P1392 VCT Solenoid #2 Circuit Malfunction
The P1392 code indicates a fault in the variable cam timing (VCT) solenoid #2 circuit. This solenoid controls the hydraulic actuator that adjusts camshaft position relative to the crankshaft to optimize engine performance. The powertrain control module (PCM) sets this code when it detects an electrical anomaly in the solenoid #2 circuit, such as a short, open circuit, abnormal resistance, or out-of-range signal. Solenoid #2 typically corresponds to cylinder bank 2 on V engines or the exhaust side on specific Ford configurations.
01. Most Common Causes
- Faulty VCT solenoid #2 with abnormal internal resistance
- Short to ground or voltage in the solenoid wiring
- Open circuit in the solenoid harness
- Corroded, loose, or damaged solenoid connector pins
- Excessive resistance in circuit connections
- Mechanically stuck VCT actuator
- PCM failure (less common)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Rough idle or engine misfire
- Reduced engine power or poor acceleration
- Decreased fuel economy
- Failed emissions test
03. Step-by-Step Diagnosis
Scan for codes and verify P1392 is present
Inspect VCT solenoid #2 connector and wiring for damage, corrosion, or loose connections
Test solenoid resistance with a multimeter and compare to manufacturer specs
Check for shorts to ground or power in the circuit
If wiring and solenoid are okay, test PCM output signal
1. Frequently Asked Questions
Is it safe to drive?▼
You can usually drive short distances, but the vehicle may have reduced performance and fuel economy. Prolonged driving could cause further engine damage, so it's best to diagnose and repair promptly.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, including parts and labor. A new VCT solenoid costs $50–$150, and labor adds $100–$250 depending on the vehicle.