I have a Hyster H120XM L005 GM 4.3 that has an intermittent shutdown issue. Machine may run 3 minutes, may run 30 seconds before code throws and shuts down. Machine oil levels are good, is not running hot, has new lock off and regulator, runs great until shutdown then cycle key and it immediately starts and runs again. Haven't been able to get the code to flash, I don't think it is storing and the local dealer does not support the software to pull codes with a computer. I'm assuming wiring, faulty sensor, or ECM is the issue. Any good starting points to suggest?
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