Possible Cause
WARNING: This page is about a different car, the 2019 Nissan NV3500 HD and 2019 Nissan NV2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
P0078
- Harness or connectors (Exhaust valve timing control solenoid valve circuit is open or shorted)
- Exhaust valve timing control solenoid valve
P0084
- Harness or connectors (Exhaust valve timing control solenoid valve circuit is open or shorted)
- Exhaust valve timing control solenoid valve