John Deere 000735.05 – PTQ/PTP/PTI/PTR: Transmission Sensor Circuit Problem

This fault code indicates a circuit problem within the transmission system, requiring immediate attention to prevent further damage or operational issues. The exact technical meaning depends on the specific transmission control unit installed: for PowrQuad (PTQ) controllers, it signifies a rear control valve or sensor circuit issue (intensity too low); for PowerShift (PTP) controllers, it points to a Clutch C2 Solenoid Circuit Fault; and for Infinitely Variable Transmissions (PTI), it indicates a High Clutch Solenoid Circuit Fault.

• 6020
• 6030
• 7030
• 8130
• 8230
• 8330
• 8430
• 8530
• 5085M
• 5095M
• 5095MH
• 5105M
• 5015ML
• 444
• 544
• 624

1. 1

   Restart the machine to see if the diagnostic code is an intermittent issue

2. 2

   Check relevant fuses (e.g., F9 for ECU communication) for communication-related issues that can accompany solenoid faults

3. 3

   Inspect transmission fluid levels, as low or incorrect levels can cause erratic behavior

1. 1

   Locate suspect solenoid

   Identify the specific clutch solenoid (C2, High Clutch, or Reverse) on the transmission's valve body. On IVT transmissions, this may require accessing the hydro control valve area under a bottom cover shield. Draining transmission fluid is often necessary.

2. 2

   Inspect wiring and connectors

   Carefully examine the wiring harness leading to the identified solenoid. Look for any signs of damage, such as chafing, breaks, or corrosion in the connectors. Ensure all connections are secure.

3. 3

   Test solenoid circuit voltage

   With the key on (engine off), back-probe the connector to verify that the solenoid is receiving the correct voltage from the control unit.

4. 4

   Test solenoid resistance

   Disconnect the solenoid and use a multimeter to measure the resistance across its terminals. Compare to manufacturer specifications. Infinite resistance indicates an open circuit (broken internal winding); zero or near-zero ohms suggests a short circuit.

5. 5

   Test solenoid function

   If the circuit tests well, apply the specified voltage directly to the solenoid to see if it actuates. An audible click should be heard.

6. 6

   Replace faulty components

   If the solenoid is determined to be faulty, replace it. If the wiring is damaged, repair or replace the harness.

7. 7

   Change fluid and filter

   Since the transmission was likely drained for access, change the transmission fluid and filter before refilling.

8. 8

   Clear codes and calibrate

   Clear the fault codes from the control unit. Perform a transmission calibration procedure if required by the specific transmission type to ensure proper shifting.