What does this code mean 0077 p7-f-inj-ting-fb for my nissan caravan

SOURCE: I want to know the meaning of error code 0077.

The error concerns the intake valve timing control solenoid (VTC). If you have the 16v transverse engine the solenoid is located on the left of the engine at the back of the cylinder head: look at the four injectors at the rear of the cylinder head and then imagine a fifth one at the left and this is the position of the VTC. If has a electrical connector to the top of it and an oil pipe connection to its side. This device is used to adjust the valve timing through oil pressure action on the cam assembly. A high reading (error code p0077) indicates that the 'ground' wire is either disconnected or broken to the VTC. Disconnect the electrical connector and ensure the the the plug pins and socket are free of oily grime or corrosion that might interfere with electrical conduction. Disconnect the negative terminal from the battery before doing such work. When everything is clean reconnect everything, clear the code and test.