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C1203 Diagnostic Trouble Code Discussion for June 2010

ecm communication circuit malfunction

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Trouble Ticket Help Requests for DTC C1203
Help Request Posted
2007 Toyota Prius 1.5L No Start, MIL Lamp on VIN: JTDKB2OU17
C1203: communication circuit malfunction. On start up engine will run for 5 to 10 seconds then cuts fuel and stalls after code sets, poaof in hv ecu. ICE can be kept running by adding fuel through throttle body. Car is from a body shop after being hit in the front end.
June 09, 2010