U1950 Diagnostic Trouble Code Discussion for November 2016
communication bus fault UART Base Protocol
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| Help Request | Posted | |
| 2007 Ford F-150 XL 5.4L No Start VIN: 1FTPF12577 U1950: communication bus fault UART Base Protocol. High miles truck ran fine but would not start later cold. I suspect ignition switch problem. We removed plugs, old, dirty. We double checked fuel pressure, spark, injector pulse from ECU. Good. We removed B1 and B2 oxy sensors to check for excessive back press... |
November 03, 2016 |
