John Deere 000190.18 – PTQ/PTP: Engine Speed Low

The transmission control unit has detected an engine RPM that is insufficient for the commanded gear or wheel speed. This typically occurs under high load at low engine speeds, or if the engine is unable to maintain the required RPM due to a performance issue. This fault is logged as a protective measure to prevent engine stalling and potential damage to the transmission. In some instances, the system may disengage the transmission to prevent the engine from stalling.

• 6020 Series
• 6920S
• 6920SE
• 7010 Series
• 7810
• 7030 Series
• 7630
• 7730
• 7830
• 7930
• 8030 Series
• 8130
• 8230
• 8330
• 8430
• 8530
• 8030T Series
• 8230T
• 8330T
• 8430T
• 9030 Series
• 9230
• 9330
• 9430
• 9530
• 9630
• J Series
• 7185J
• 7195J
• 7205J
• 7210J
• 7225J

1. 1

   Assess operating conditions: reduce the load on the tractor or select a lower gear.

2. 2

   Increase engine RPM to ensure the tractor is being operated at a sufficient engine speed for the task.

3. 3

   Restart the tractor by placing it in park, shutting off the engine, and restarting to reset communication messages between control modules.

4. 4

   Check for other diagnostic trouble codes, particularly from the Engine Control Unit (ECU), which could indicate a root cause like fuel system or sensor issues.

1. 1

   Evaluate engine performance

   Investigate the overall health of the engine. Check for restricted fuel filters, which can cause a loss of power under load.

2. 2

   Inspect engine speed sensor and wiring

   Inspect the engine speed sensor and its wiring for damage or intermittent connections. A faulty sensor could provide incorrect data to the transmission control unit.

3. 3

   Update software and calibrate transmission

   If hardware checks pass, have a qualified dealer check for transmission-related software updates or calibration errors and perform necessary calibrations.

4. 4

   Check hydraulic system

   Check hydraulic oil levels and inspect for restricted filters, which can impact transmission performance and indirectly contribute to this fault.