Power Solutions International, Inc.

DTC 89 20

UnclassifiedGeneral

What This Code Means

MIL ON during active fault; Closed Loop Disabled

Possible Causes

  • •Failed alternator
  • •Supply voltage problem
  • •UEGO processing circuitry supply voltage is too low

Suggested Actions

  1. 1Inspect alternator and repair/replace as needed
  2. 2Troubleshoot supply voltage source; repair/replace as needed
  3. 3Replace UEGO sensor and re-test
  4. 4Replace ECM and re-test

Related Power Solutions International, Inc. Fault Codes

DTC 108DTC 121DTC 15 74DTC 123DTC 2 34DTC 127DTC - 520DTC 129DTC - 359DTC 148DTC - 16DTC 234
Browse all Power Solutions International, Inc. fault codes

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