Advanced Diagnostics

DTC P1898: CVT Drive Pulley Pressure Control Valve Stuck ON or CVT Driven Pulley Pressure Control Valve Stuck OFF




General Description
The CVT drive pulley pressure control valve and the CVT driven pulley pressure control valve control hydraulic pressure. When the pulley ratio with the vehicle stopped and the throttle closed is low when shifted to the D or S position, and the pulley ratio when driving is also low, a malfunction is detected and a DTC is stored.




Monitor Execution, Sequence, Duration, DTC Type, OBD Status




Enable Conditions

Malfunction Threshold
Judgment B occurs after judgment A occurs.
Judgment A The pulley ratio range is 2.2 to 2.7.
Judgment B The pulley ratio range is 1.8 to 2.7.

Driving Pattern
1. Start the engine, and warm up the engine until the engine coolant temperature reaches 176 °F (80 °C).
2. Shift to the D position.
3. Keep the brake pedal pressed for 5 seconds.
4. Speed up to 41 - 49 mph (65 - 80 km/h) on a flat road and drive at least 15 seconds at 41 - 49 mph (65 - 80 km/h). (Do not release the accelerator during the test-drive.)
5. Slow down and stop the vehicle, then keep the brake pedal pressed for 5 seconds.
6. Turn the ignition switch OFF.
7. Repeat steps 1 through 6.

- Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

Diagnosis Details

Conditions for illuminating the MIL
When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the PCM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

Conditions for clearing the MIL
The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.