Power Solutions International, Inc.

8902

UnclassifiedGeneral

What This Code Means

Malfunction Indicator Light (MIL) is ON during active fault; Adaptive learn is disabled

Possible Causes

  • •Engine related problem
  • •Fuel system related problem
  • •Internal fault within the ECM
  • •Short to Vbattery in harness
  • •UEGO heater control signal is greater than 32V when the heater is switched on
  • •UEGO heater element has short
  • •UEGO heater supply voltage is greater than 32V

Suggested Actions

  1. 1Disconnect the harness from the ECM and check the heater control signal (between Pin 3 of the UEGO sensor and Pin 75 of the ECM) for a short to Vbattery using a DMM checking one pin at a time to the positive battery terminal
  2. 2Disconnect the harness from the UEGO Sensor and ECM and measure the heater resistance with a DMM (between pins 3 and 4 for Bosch sensor)
  3. 3Perform OBD system check
  4. 4Perform the On-Board (OBD) System Check
  5. 5Repair short to Vbattery in harness
  6. 6Replace ECM
  7. 7Replace UEGO sensor if heater resistance is less than 0.5 ohms
  8. 8Verify the operation of the MIL

Related Power Solutions International, Inc. Fault Codes

890489108901891430328916303189202229520240:32135DTC - 16
Browse all Power Solutions International, Inc. fault codes

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