DTC Advanced Diagnostics: P0966
DTC P0966:CVT Driven Pulley Pressure Control Valve Circuit Low

General Description

The CVT driven pulley pressure control solenoid valve controls hydraulic pressure to the driven pulley. The CVT driven pulley pressure control solenoid valve is controlled by duty cycle output. The spool in the CVT driven pulley pressure control solenoid valve moves the valve according to the current, and produces hydraulic pressure in proportion to the current. The powertrain control module (PCM) measures the current that passes through the CVT driven pulley pressure control solenoid valve and uses feedback control to compensate for the difference between the measured current and the commanded one. The failure occurs by an open circuit or an intermittent open circuit. If the current does not flow to the CVT driven pulley pressure control solenoid valve for a specified duration when the driver circuit of the CVT driven pulley pressure control solenoid valve is ON, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status
Execution
Continuous
Sequence
None
Duration
1 second or more
DTC Type
One drive cycle, MIL on, A/T gear position indicator blinks
OBD Status
PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Enable Conditions
Condition
Minimum
Maximum
12 volt battery voltage [Battery Voltage]
10.0 V
–
No active DTCs set (prevents monitor from running)
P0716, P0717, P0746, P0777, P0780, P0792, P0793, P0796, P0962, P0963, P0967, P0970, P0971, P1898, P1899
[ ]: HDS Parameter

Malfunction Threshold
Current does not flow to the CVT driven pulley pressure control solenoid valve for at least 1 second when the driver circuit of the CVT driven pulley pressure control solenoid valve is ON.

Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
CVT driven pulley pressure control solenoid valve DNLS line open (includes connector loose connection or disconnection)
CVT driven pulley pressure control solenoid valve internal circuit open
PCM internal circuit failure

Confirmation Procedure
Operating Condition
Start the engine, and wait for at least 1 second.

With the HDS
None.

Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.