my chrysler pacifica wont turn over or start but the code pop up p0499 p0688

Question

it was startin a took out the spark plung then them code pop up now it wont start

Answer 1

P0449 NVLD canister vent valve solenoid circuit high

P0688 ASD relay sense circuit low

The reason for the no start is P0688. You can replace the ASD relay or swap it out and see if it starts. If it does not start you will need a PCM. and if the PCM is replaced you will need to have the PCM reprogramed with the VIN of the vehicle.