Help! Single mom with 1998 Volvo S70 which has usually been dependable. Flashing arrow and check engine light - code for Throttle Error - did nothing but reset and good for 3K miles. Then lights back on again. New TPS did not fix problem. Instead Volvo was stuck in First Gear only. New used TCU got all the gears working and engine light stayed off temporarily. But one week and couple hundred miles later... engine light back on again even with new TPS and new used TCU. Error code still P0120. Any ideas on next steps? Thanks!!!!!
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