My mechanic has tried to solve the air bag issue of passenger air bag light staying on and he said his scanner does not communicate with the ECU sensor and SRS system and advises that the ECU sensor is probably defective and should be replaced. Any advice on solving this problem would be appreciated. Owned since new, the truck has 128,000 miles and I have put a good bit of money into repairs over the last couple of years - shocks, complete AC repairs, tires, new clutch and master cylinder, resealed leaking rear window, radiator hoses. The only other ongoing problem is the 420 OBII code has been popping off and on for several years and apparently I need to replace the catatlytic converter. I have gotten quotes of about $800 for new converter, but warranty is only for 6 months. My son and I have driven my 1998 Ford Ranger XLT (4x4, 4.0 L) for several years with the air bag system disabled. I need to bite the bullet and fix both problems. Any thoughts?