What this code means
P0777 may indicate the CVT driven pulley pressure control solenoid valve system is not responding the way the ECM/PCM expects.
What the vehicle may do
- The vehicle may show abnormal CVT operation.
- The driver may notice reduced performance.
- A warning light may be present.
Possible fault areas
- Possible driven pulley pressure control solenoid valve concern.
- Possible lower valve body or hydraulic control concern.
- Possible intermittent condition that only appears under certain operating conditions.
Diagnostic path
Opening context and setup
On this 2010 to 2016 Honda CR-V with the 2.4 gas engine, P0777 may point to a problem with the CVT driven pulley pressure control solenoid valve. In plain terms, the transmission control system may not be getting the hydraulic control response it expects. The driver may notice abnormal CVT behavior, reduced performance, or a warning light, but this code still needs to be duplicated before calling the repair. Broadly, the possible fault areas can include the driven pulley pressure control solenoid valve, the lower valve body and hydraulic control side, or an intermittent condition that only shows up under the right operating conditions. Before chasing the code, start with the basic system checks so you are not building the diagnosis on top of a simple overlooked issue.
Clear the code and reproduce the operating conditions
Start by turning the vehicle to the ON mode. Then use the HDS to clear the DTC and make sure the code is cleared. Next, road test the vehicle in D position or mode until vehicle speed reaches 37 mph (60 km/h). Slow down and stop the vehicle. Then accelerate from a stop at full throttle in D position or mode until vehicle speed reaches 37 mph (60 km/h). After that first drive cycle, turn the engine off, then repeat the same ON, clear-code, and test-drive sequence a second time.
Decision point after the road test
After the repeat drive, check for pending or confirmed DTCs with the HDS. The decision is simple: is P0777 indicated or not? If P0777 is indicated again, the failure has been duplicated. At that point, the diagnostic path identifies the CVT driven pulley pressure control solenoid valve as faulty, and the directed repair is replacement of the lower valve body. If P0777 is not indicated, treat it as an intermittent failure and the system is OK at this time. If captured operating data is available for this code, try to reproduce the failure under those same captured conditions instead of guessing.
Closing takeaway
The key on P0777 is duplication. Clear it, run the specified drive pattern twice, then let the scan result decide the next move. If the code returns, follow the lower valve body repair path. If it does not return, handle it like an intermittent and work from the captured conditions. For more diagnostic training, visit stepdiagnostics.com.
Final check
P0777 is handled by clearing the code, reproducing the specified driving conditions, and making the repair decision based on whether the code returns.
For more guided automotive diagnostics, visit STEP Diagnostics.
