Car was bumper-to-bumper in traffic merging on I-10 traffic in Houston. Traffic started moving a little faster, I gave the accelerator a little nudge. Car did not go, make a large boom in the engine compartment, and the display gave me the "Check Hybrid System" error and stopped cold. 4 re-tries on car off then on, same message. Anyone have this trouble before? 2010 Toyota Prius IV, 45,013 miles. No notice of any trouble before. Only I drive it and I have worked on cars for 40 years now. Looked at threads - everyone talking about some plug - since I was driving that is not the problem. Car was towed to Toyota dealer $155 Houston, TX mandated tow charges, arrived dealer at 1730. SO REALLY looking for feedback. Thanks guys! #2 - I am second owner through CarMax - history on car was one minor, not drivetrain issue. Also procured extended warranty due to complexity of my car. Towing is refundable through GEICO. Car is under drive train warranty to 60 k or 80 k so I expect Toyota will reimburse me. I would think transaxle would not stop drive train/engine and give hybrid error. The mandated charge is due to flow stoppage or slow down - I had no choice Diagnostics not run yet so codes will be posted later - dealer said transaxle would be messy with a lot of noise Really HAS ANYONE ELSE had this PROBLEM?? #3 Others are posting about other, maybe not similar occurrences of hybrid system issues. I appreciate the leads and data. #4 Mike Calvert Toyota has found four (4) diagnostics codes. So far, unable to pass on. Bad hybrid 201.6V batteries is one of the codes - and an isolated battery check cleared the battery as good. They are talking wiring now - HA - how can wiring make a very loud noise? The technician, the shop foreman and now StarTech? (Toyota national service???) spent the afternoon talking and consulting with the local people. Tomorrow is another day. #5 Diagnostics codes - E1310, C1259, P324E, P0A94. Toyota told the dealer not to disassemble the inverter any further. Authorized shipment of new inverter, due Friday a.m. Has accepted problem under warranty - car repairs, towing, and loaner car to be paid by Toyota. Service Rep thinks COB tomorrow - I have my doubts with extensive testing and validation after new inverter installation. That is the ENTIRE electrical box / assembly under the hood - right?