New Holland ENG 3142 – Engine Control Module (ECM) / EDC: High Pressure Test - Test Active

This is an informational status code indicating that the engine's electronic control system is currently running a diagnostic high-pressure test on the common rail fuel system, or that the code was logged in the memory during a previous diagnostic session when a technician manually initiated the test.

• T6
• T7
• T7.220
• T7.235
• T7.250
• T8
• T9
• CR Series
• CR8090
• B110B
• LB75
• LB110
• LB115

1. 1

   Verify EST Connection: Check if the CNH Electronic Service Tool (EST) laptop is currently connected to the machine and actively commanding the high-pressure fuel test.

2. 2

   Check Code Status: Determine if the code is 'Active' or 'Stored/Inactive'. If it is stored, it is simply a historical record that the test was run.

3. 3

   Scan for Accompanying Codes: Look for other active fuel system fault codes (such as rail pressure too low, metering unit faults, or fuel leaks).

1. 1

   Manage diagnostic test

   If a diagnostic test is currently running via the CNH EST, allow the test to finish or manually abort the test in the software.

2. 2

   Disconnect diagnostic tool

   Disconnect the diagnostic tool (if applicable).

3. 3

   Turn ignition OFF

   Turn the ignition key to the OFF position.

4. 4

   Wait for ECM power down

   Wait for the ECM to fully power down. You must wait for the main ECM relay to click off (this typically takes 30 to 60 seconds after the key is turned off).

5. 5

   Turn ignition ON

   Turn the ignition key back to the ON position.

6. 6

   Clear fault codes

   Reconnect the CNH EST, navigate to the Engine Control Module (EDC), and clear the inactive/stored fault codes.

7. 7

   Verify code resolution

   Start the engine and verify that code 3142 does not return. It will only return if the high-pressure test is manually initiated again.