This DTC code?
P1381 - Variable Cam Timing Over-advanced (Bank 1)
The comprehensive component monitor (CCM) monitors the VCT position for an over-advanced camshaft timing. The test fails when the camshaft timing exceeds a maximum calibrated value or remains in an advanced position.
Cam timing improperly set
No oil flow to the VCT piston chamber
Low oil pressure
VCT solenoid valve stuck closed
Camshaft advance mechanism binding (VCT unit)
P1381 DTC is a check of the VCT unit. Testing should not include electrical checks. Diagnostics and repair for the VCT unit are located in the Workshop Manual.