Power Solutions International, Inc.

DTC 127

UnclassifiedGeneral

What This Code Means

MIL ON (Malfunction Indicator Light active); Engine shut down

Possible Causes

  • •Inlet air is much hotter than normal
  • •Air inlet system is obstructed, modified, or damaged
  • •Hot air from the engine, exhaust, or radiator is recirculating into the air inlets
  • •Incorrect valve lash
  • •Cracks or breaks in the air inlet system allowing heated air to enter

Suggested Actions

  1. 1Ensure that the air inlet is not obstructed, modified, or damaged
  2. 2Ensure hot air from the engine, exhaust, or radiator is not recirculating into the air inlets
  3. 3Refer to the 40L Owner's manual or service manual to adjust the valve lash accordingly
  4. 4Inspect the air inlet system for cracks or breaks
  5. 5Follow the diagnostic steps for DTC 112 - IAT Low Voltage if no other causes are found

Related Power Solutions International, Inc. Fault Codes

DTC 129DTC 148DTC 123DTC 234DTC 121DTC 238DTC 108DTC 299DTC 89 20DTC 327DTC 15 74DTC 336
Browse all Power Solutions International, Inc. fault codes

ASK RUDY ABOUT THIS FAULT

Get a diagnosis walkthrough for DTC 127 on your specific Power Solutions International, Inc. unit — cited to the OEM manual, not a forum guess.

GET THE ANSWER

Free account required — we'll bring your question with you.