Greetings, all!
My Range Rover Evoque 2.2 Diesel, which has the ZF 9HP 9-speed automatic gearbox, recently developed a gearbox problem, and I would appreciate any advice you can give me.
Issue at Hand:
The gearbox abruptly disengaged into Neutral two nites ago as I was travelling at approximately 80 km/h on a straight road and heard a whistling or whining noise. Initially, I disabled the engine, used the key fob to lock and unlock the car, and then restarted. After choosing option D, the error disappeared, and the vehicle drove smoothly thereafter.
But the problem came back the following day. There was no way to fix the diagnostic error this time because the gearbox stayed locked.
Diagnostic Results from an OBD-II Scan:
The hydraulic pressure sensor (P0936-64, Permanent) has an intermittent circuit.
The processor for the gearbox control module is P0613-44, and it is intermittent.
Transmission control system (MIL request): P0700-00 (Intermittent)
A high-speed CAN communication bus, U0001-87/U0001-86 (Intermittent)
I am unable to unlock the gearbox because my scanner has marked the P0936-64 code as Permanent.
My mechanic is going to lower the sump pan to check for a physical problem with fluid pressure, which could be an oil pump or torque converter issue. But since the warning indicates a hydraulic pressure sensor intermittent electrical circuit, I'm trying to figure out whether the problem lies with the mechatronic valve body/solenoids, the external 16-pin connector, oil contamination, or the internal wiring harness.
Is anyone familiar with this P0936-64 code? Did you need to replace the pump and all the mechanical parts, or was the problem solved by fixing the electrical connector and wiring harness?
A word of wisdom or anecdote would be great