Fault Codes/Power Solutions International/3012Power Solutions International3012UnclassifiedGeneralWhat This Code MeansMalfunction Indicator Light (MIL) ON; Adaptive learn disabled; Closed loop may be disabledPossible Causes•UEGO heater supply voltage > 32 volts•UEGO heater control signal does not achieve zero volts when the heater is switched on•Short to Vbattery in the heater control signal circuit•Internal fault within the ECMRelated Power Solutions International Fault Codes301430312229303221353468:1167469871673890116508902Browse all Power Solutions International fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 3012 on your specific Power Solutions International unit — cited to the OEM manual, not a forum guess.TRY IT FREE