Fault Codes/Power Solutions International/123Power Solutions International123UnclassifiedGeneralWhat This Code MeansMIL ON during active fault; Engine Shutdown; Engine shutdownPossible Causes•TPS1 voltage is greater than 4.8V or less than 0.2V AND TPS2 voltage is greater than 4.8V or less than 0.2V•Simultaneous voltage out-of-range faults for both TPS1 and TPS2•Throttle Position Sensor (TPS) failure•TPS 1 sensor voltage exceeds 4.800 volts during cranking or runningSuggested Actions1Replace the electronic throttle assembly2Troubleshoot according to TPS1 voltage out-of-range following DTC 122 and 123 procedures3Troubleshoot according to TPS2 voltage out-of-range following DTC 222 and 223 proceduresRelated Power Solutions International Fault Codes161 4222122223121302 4117 4302 9111:0326108327Browse all Power Solutions International fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 123 on your specific Power Solutions International unit — cited to the OEM manual, not a forum guess.TRY IT FREE