PTQ 000190.18 – INFORMATION FOR OPERATOR: Engine Speed Too Low

PTQ 000190.18 (PTQ 190.18)

Code: 000190.18

Shortcode: 190.18


This diagnostic trouble code, PTQ 000190.18, indicates that the engine is running at a speed of less than 300 rpm for more than 3 seconds, which can occur when the engine stalls.


When this error is detected, the control software shifts the transmission to neutral to prevent potential damage and ensure safety.


Inspect Engine Operation:

  • Check for any signs of engine stalling or irregular operation.
  • Address any issues that may cause the engine to run at a low speed, such as fuel delivery problems or ignition issues.

Check Idle Speed:

  • Verify that the engine idle speed is set correctly according to the manufacturer’s specifications.
  • Adjust the idle speed if it is found to be too low.

Examine Fuel System:

  • Inspect the fuel system for any blockages, leaks, or faulty components.
  • Replace or repair any defective parts in the fuel system to ensure proper fuel delivery.

Inspect Ignition System:

  • Check the ignition system for any faults, including spark plugs, ignition coils, and wiring.
  • Replace any defective components to ensure proper engine ignition.

Monitor Engine Performance:

  • After addressing the above steps, monitor the engine performance to ensure it operates smoothly and does not stall.


  • Regular maintenance of the engine and its related systems can prevent issues with low engine speed.
  • If the problem persists despite taking the above measures, consult technical support or the manufacturer for further assistance.

Control Units: John Deere

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