Power Solutions, Inc.

DTC 244

UnclassifiedGeneral

What This Code Means

System running rich; Adaptive multiplier out of range (at limit of -30%)

Possible Causes

  • •Air filter plugged
  • •Air intake duct collapsed or restricted
  • •Dirty or loose ECM grounds
  • •Drastic variation in fuel quality (very high butane content)
  • •Faulty 3-way pressure trim solenoid
  • •Faulty HO2S sensor
  • •Fuel system fault
  • •HO2S signal circuit wiring fault
  • •High secondary fuel pressure
  • •Worn fuel mixer

Suggested Actions

  1. 1Check ECM grounds to ensure they are clean and tight
  2. 2Clear DTC information from the ECM using the DST and verify normal engine operation with no stored codes
  3. 3Diagnose and repair any other present DTC codes prior to proceeding
  4. 4Diagnose any other ECM codes present before beginning this diagnostic procedure
  5. 5Disconnect HO2S sensor and ECM wire harness connectors, turn key ON, and check voltage at HO2S connector signal pin B and engine ground using a DVOM
  6. 6Ensure specified HD-5 or HD-10 motor fuel grade propane is used
  7. 7Perform On-Board Diagnostic (OBD) System Check
  8. 8Refer to Section 1B Fuel System Diagnostics
  9. 9Repair HO2S circuit as necessary
  10. 10Replace HO2S sensor
  11. 11Visually and physically check the air filter for being plugged
  12. 12Visually and physically check the air intake duct for being collapsed or restricted

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