2000 Chevrolet 1500 5.3L Engine Starts Then Shuts Off with P0001, B00001, C0001, U0001 Fault Codes
My 2000 Chevrolet 1500 5.3L truck was running normally when I parked it. Since then, whenever I try to start the vehicle, it starts but runs for only a few seconds before shutting off unexpectedly. Using an Innovas 3120 OBD2 scanner, I'm seeing fault codes P0001, B0001, C0001, and U0001. The truck has not undergone any modifications—no parts added or removed—and the battery is in good condition. It was parked for a short period before symptoms appeared. I'm seeking advice on how to diagnose and resolve this issue to get my truck running properly again.
- All normal prior to parking; the fault codes (P0001, B0001, C0001, U0001) appeared after starting attempts. - Start with U0001—could this indicate a communication network error in the engine control system? - Any details on how long the vehicle was parked? Was it fully off or just idle? - Vehicle is stock: no modifications, no added components, battery is functioning properly. - Given these symptoms and codes, I recommend rescan using a different OBD2 scanner to confirm code accuracy and rule out reader-specific issues.