My Check Engine Light And Power Steering Light Illuminates On A Regular Basis. The Dealer Has Put Two Speed Sensors On It But I'm Still Having The Same Problem. At Times There Seems To Be Excessive Backlash In The Differential At Acceleration. When This Happens The Speedometer Doesn't Work And The Lights Come On After A Short Distance. I'm Getting Codes 1 84 2 And 0 84 19. If I Let Up On The Accelerator Before The Lights Come On The Speedometer Will Start Working And Everything Is Okay. Any Ideas? Could The Backlash In The Differential Cause The sensor To Get A Bad Signal?