Power Solutions International

112

UnclassifiedCooling

What This Code Means

MIL (Malfunction Indicator Light) ON; Adaptive disabled during active fault; Damaged or melted MAP sensor; Intake backfire (>= 4 events); Malfunction Indicator Lamp (MIL) ON; Intake Air Temperature greater than 140 degrees F; Burn back or backfire; DST displays IAT voltage less than the limit defined in calibration; Intake backfires (4 or more events); MIL ON; MIL ON during active fault; Engine will not start; Engine shutdown during operation

Possible Causes

  • •Improper fuel-air mixtures
  • •Worn ignition components
  • •Improper valve lash settings
  • •Engine timing issues
  • •Bad sensors
  • •Problem with the air inlet system
  • •Incorrect valve lash
  • •Engine heat recirculating into the intake
  • •Cracks or breaks in the air inlet system allowing hot air in
  • •Obstructed, modified, or damaged air inlet
  • •Intermittent Problem
  • •Faulty IAT sensor
  • •Sensor signal circuit shorted to ground
  • •Faulty ECM
  • •IAT sensor voltage is less than 0.050V for 1 second while the engine is cranking or running

Suggested Actions

  1. 1Capture ALL fault code history in MASTER and SLAVE ECMs
  2. 2Download ALL fault code flight data recorders from MASTER and SLAVE ECMs
  3. 3Download ALL fault snapshot from MASTER and SLAVE ECMs
  4. 4Download Backfire Histogram from MASTER and SLAVE ECMs
  5. 5Inspect spark plugs for water ingress/corrosion from the top side (coil side)
  6. 6Inspect ignition coil wire harness (closely looking at pin conditions)
  7. 7Ensure that the air inlet is not obstructed, modified, or damaged
  8. 8Ensure the intake air is being sourced from a cool location
  9. 9Inspect the air inlet system for cracks or breaks
  10. 10Adjust the valve lash according to the 40L Owner's manual or service manual
  11. 11Follow the diagnostic steps for DTC 112 - IAT Low Voltage
  12. 12Perform On-Board (OBD) System Check
  13. 13Check wire harness for ground short
  14. 14Capture ALL fault code history in MASTER and SLAVE ECM’s
  15. 15Download ALL fault code flight data recorders from MASTER and SLAVE ECM’s
  16. 16Download ALL fault snapshot from MASTER and SLAVE ECM’s
  17. 17Download Backfire Histogram from MASTER and SLAVE ECM’s (located on Service page)
  18. 18Verify Spark Plug Resistance Value is between 3.5 to 7 kOhm
  19. 19Verify Crank Position Sensor gap and shim as needed

Related Power Solutions International Fault Codes

116157 411118821710241352136015171572520240:3DTC 18 7
Browse all Power Solutions International fault codes

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