What Does P1386 Mean?
This dual-condition code indicates either the variable valve timing system on bank 1 is too far advanced, or a misfire has been detected while the PCM cannot communicate with the Body Control Module. The issue likely relates to VVT control or network communication.
Common Causes
30%
Faulty VVT solenoid stuck open on bank 1
25%
Low oil pressure or incorrect oil viscosity affecting VVT
20%
Communication bus fault preventing BCM communication
15%
Sludged or clogged VVT oil passages
10%
Faulty camshaft position sensor providing incorrect feedback
Diagnostic Steps
1
Step 1: Check engine oil level and condition; verify correct oil viscosity is being used
2
Step 2: Use scan tool to command VVT solenoid and monitor actual vs. desired cam timing
3
Step 3: Test VVT solenoid resistance and operation; check for stuck valve or debris
4
Step 4: Check for communication codes with BCM and test CAN/communication bus circuits
5
Step 5: Inspect camshaft position sensor signals for proper operation and correlation with crankshaft
Estimated Repair Cost
$200 - $2,000
Parts + labor, varies by vehicle and location
This dual-condition code indicates either the variable valve timing system on bank 1 is too far advanced, or a misfire has been detected while the PCM cannot communicate with the Body Control Module. The issue likely relates to VVT control or network communication.
The most common cause of P1386 (Variable Cam Timing Overadvanced (Bank #1)/ Misfire Detected - No Communication with BCM) is: Faulty VVT solenoid stuck open on bank 1
Typical repair costs for P1386 range from $200 to $2,000, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause poor engine performance, hesitation, and reduced fuel economy. Engine may enter limp mode, limiting power output.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1386 to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing and Communication Network
Difficulty
Type
Manufacturer
Recommended Tools
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