Hi, I have a Chev Metro 2000 Automatic that I am trying to pass the Calif Smog test. It passed to emission Test. It failed for (OBO Code)P0705 Trans Range Sensor Malfunction (PRNDL Input). The Service Check engine Light is on. Also, Can you explain, what controls the yellow level that helps to release the Gear Shift out of Park. I checked under the Console now I am stuck. I can see what could possibly control. I do not want to take anything apart before I know it is the right thing to do. Can anyone Help.

There is a diagnostic route on the PO705 code,which involves hooking up a scan tool,and verifying sensor functions.It can also involve checking continuity of the circuit,and PCM commands.The majority of the time,replacing the sensor in question resolves the problem,but after replacement,the sensor needs adjusting to be correctly aligned,to give the correct reading in each gear range.If replacing the sensor does not repair the problem,then it's down to checking the wires involved in the circuit for continuity.If the wires check out OK,then it's going to be checking the PCM (computer) for proper commands and outputs.Resolving the code will likely repair the problem you are having getting the vehicle out of Park.The "stuck in Park" problem has to do with the shift interlock,where you have to press the brake pedal down to disengage the shifter.It is possible you have two separate problems,but repair the PO705 code first,and see what happens with the interlock problem.The PO705 HAS to be repaired to pass inspection anyways.I guess i didnt explain,but the PRNDL switch is the sensor that tells the vehicle computer (PCM) which gear the trans is in..Park,Reverse,Neutral,Drive,Low (PRNDL).Good luck.