3.2.262. SPN 5035, FMI 13, Downstream NOx sensor calibration NOT AVAILABLE or incompatible sensorΒΆ

Description

The EEM4 monitoring system is not able to detect the calibration verification number.

Possible causes are:

  • The downstream NOx sensor is defective.
  • The downstream NOx sensor is installed incorrectly.
  • The downstream NOx sensor is missing.
  • The downstream NOx sensor wiring is defective.
  • Possible tampering.

Reaction in EEM

The FC is stored and the warning lamp is activated. The CAN message indicates active fault.

NOTE: The present fault is classified as an emission related fault. Engine power will be reduced after a certain time which is defined by an authority.

Solution

First save the error log and then erase it. Restart the ECU after erasing the error log. If the fault occurs again during the next driving cycle, check the following paths:

  • Check the downstream NOx sensor wiring, the connectors and the contact surfaces of the connector pins (possible oxidation).
  • Check the downstream NOx sensor assembly. Make sure the sensor is assembled according to the AGCO Power installation instructions.
  • Check the operation with another downstream NOx sensor to see if the sensor is defective.
  • A possible tuning chip may interfere with the NOx sensor signal.

See NOx sensor for reference.