How to Fix AGCO Machine Trouble Code SPN 1136 FMI 02: ECU Temperature No Signal

June 8, 2026 Obdii.shop AGCO Machine Repair 0

AGCO machine trouble code SPN 1136 FMI 02 indicates an ECU temperature signal problem. In this case, the measurement has failed inside the ECU, and the controller may not be able to provide a reliable internal temperature value.
This guide explains the meaning of SPN 1136 FMI 02, the possible cause, and the recommended diagnostic solution for AGCO machines equipped with an AGCO POWER EEM controller.
AGCO machine SPN 1136 FMI 02 ECU temperature no signal

Related Diagnostic Tools

2026 AGCO EDT Electronic Diagnostic Tool

Fault Code Information

Fault Code: SPN 1136 FMI 02
Description: ECU Temperature – No Signal
System: AGCO POWER EEM Engine ECU
FMI 02 Meaning: Data erratic, intermittent, or incorrect

What Does SPN 1136 FMI 02 Mean?

SPN 1136 FMI 02 indicates that the ECU temperature data is unreliable due to a failed or incorrect internal measurement.
When this fault occurs, the system stores the code and shows a warning; it is also reported as active over CAN.

Failure Mode

The ECU stores the fault code.
  • A warning is activated.
  • The CAN message indicates an active fault.
  • Engine control algorithms that rely on ECU temperature data may operate improperly.
Since ECU temperature influences internal protection logic, prompt fault resolution is essential.

Possible Cause

The most likely cause of SPN 1136 FMI 02 ECU Temperature No Signal is:
  • ECU hardware defect
As ECU temperature measurement occurs internally, wiring harness or external sensor defects are unlikely causes of this fault.

Before Replacing the ECU

Before replacing the ECU, perform a few basic checks to avoid unnecessary parts replacement. Make sure the machine battery voltage is stable and the ECU power supply and ground connections are normal. Inspect the ECU connector for loose pins, corrosion, water ingress, or damaged wiring. Also check whether other CAN communication or power supply fault codes are active at the same time.

If the ECU power, ground, connector, and wiring condition are all normal, and SPN 1136 FMI 02 ECU Temperature No Signal remains active, test the machine with another known-good EEM controller. If the fault disappears with the replacement ECU, the original ECU is likely defective.

Diagnosis and Solution

Proceed through each diagnostic step in sequence to guarantee a thorough assessment.

Step 1: Confirm the Fault Code

Utilize AGCO EDT or compatible diagnostic equipment to retrieve and verify fault codes from the ECU.
Confirm that the active code is:
SPN 1136 FMI 02 – ECU Temperature No Signal

Step 2: Check ECU Operation

Evaluate ECU functionality by installing a known-good EEM controller and observing machine behavior.
If the machine works with the replacement ECU and the fault is gone, the first ECU is defective.

Step 3: Replace or Repair the Defective ECU

If the issue is resolved with a new ECU, repair or replace the existing ECU.
Ensure the replacement EEM controller is compatible with the machine and engine. ECU replacement may necessitate software programming, calibration, or parameterization using AGCO EDT.

Important Notes

  • Do not replace the ECU before confirming the fault with proper diagnostic software.
  • Use a compatible EEM controller for testing.
  • ECU programming or calibration should be performed by a qualified technician.
  • If the replacement ECU requires setup, use AGCO EDT or the correct AGCO diagnostic software.

Conclusion

SPN 1136 FMI 02 typically points to an internal ECU fault. The main diagnostic step is testing with a known-good EEM controller.
If the fault does not return with the replacement ECU, the original ECU should be repaired, replaced, or reprogrammed according to AGCO service requirements.
More AGCO machine repair case,please refer to AGCO Machine Repair

FAQ About AGCO SPN 1136 FMI 02

What does AGCO SPN 1136 FMI 02 mean?

AGCO SPN 1136 FMI 02 means the ECU temperature signal is erratic, intermittent, or incorrect. The internal ECU temperature measurement may have failed.

What causes AGCO ECU Temperature No Signal?

The most likely cause is an internal ECU hardware defect, because the ECU temperature measurement is performed inside the controller.

How do I confirm the ECU is defective?

Use AGCO EDT or a compatible diagnostic tool to confirm the fault code, then test the machine with another known-good EEM controller. If the fault disappears, the original ECU is likely defective.

Should I replace the ECU immediately?

No. Before replacing the ECU, check the ECU power supply, ground, connector condition, and whether there are other communication-related fault codes.

Does ECU replacement require programming?

Yes. A replacement ECU may require programming, calibration, or parameter setup with AGCO EDT or the correct AGCO service software.

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