Fault Codes/Power Solutions International/237Power Solutions International237UnclassifiedElectricalWhat This Code MeansTIP/TOP Low Voltage; TIP voltage less than the limit defined in calibration with the engine runningPossible Causes•Faulty harness•Intermittent Problem•Faulty ECM (5Vref power supply)•Poor connection at sensor•Faulty TIP sensorSuggested Actions1Perform the On-Board (OBD) System Check2Troubleshoot DTC 642 or 643 first (if present)3Using a DMM, measure the voltage potential across 5Vref1 and 5Vrtn1 at connector4Check 5Vref1 and 5Vrtn1 connections5Jumper the TIP circuit to Vref (5 VDC) in connector on harnessRelated Power Solutions International Fault Codes642643187212215430111188910117DTC 107113DTC 113Browse all Power Solutions International fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 237 on your specific Power Solutions International unit — cited to the OEM manual, not a forum guess.TRY IT FREE