What Does P1392 Mean?
The powertrain control module has detected an electrical malfunction in the circuit controlling the second variable cam timing solenoid. This could indicate an open circuit, short circuit, or resistance issue in the wiring or solenoid.
Common Causes
40%
Faulty VVT solenoid #2 with internal electrical failure
30%
Damaged or corroded wiring harness or connector to VVT solenoid
15%
Short to ground or power in solenoid circuit wiring
10%
Corroded or loose connector pins at solenoid or ECM
5%
Failed ECM driver circuit for VVT solenoid control
Diagnostic Steps
1
Step 1: Visually inspect VVT solenoid connector and wiring for damage, corrosion, or oil contamination
2
Step 2: Measure resistance of VVT solenoid #2; compare to manufacturer specifications (typically 6-12 ohms)
3
Step 3: Check for voltage supply at solenoid connector with key on; verify ground circuit continuity
4
Step 4: Perform wiggle test on wiring harness while monitoring live data for intermittent connection
5
Step 5: Test ECM command signal to solenoid using oscilloscope or duty cycle measurement
Estimated Repair Cost
$150 - $600
Parts + labor, varies by vehicle and location
The powertrain control module has detected an electrical malfunction in the circuit controlling the second variable cam timing solenoid. This could indicate an open circuit, short circuit, or resistance issue in the wiring or solenoid.
The most common cause of P1392 (Variable Cam Timing Solenoid #2 Circuit Malfunction) is: Faulty VVT solenoid #2 with internal electrical failure
Typical repair costs for P1392 range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may run in limp mode with reduced performance and fuel economy. Safe to drive but should be repaired promptly to prevent potential engine timing issues.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1392 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Variable Valve Timing System
Difficulty
Type
Manufacturer
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
