98 Saturn w/0340 OBD II code

Read the posting of SATURNMAN about OBD 0341 and cleaning corrosion from ignition module.. My code was ODB 0340 on a 98 SL2 and I tried plugs, wires, crank sensor to no avail. .. I cleaned backside of ignition module and added star washers to the top and bottom of mounting bolts to provide a better ground and my problem was fixed...