Cost of repair for check engine code 1381 2002 Honda Accord SE. on 2002 Honda Accord

My check engine light goes off and on accompanied by a shudder. It usually occurs after driving on the highway about the time I slow down for the off ramp, but now that it is AC season, it's on every time I use the AC. My mechanic already replaced the cam shaft sensor assembly & crank shaft and put in new ignition wires but that hasn't helped. What else could be wrong and about how much to repair?

Asked by for the 2002 Honda Accord
im leaning towards a bad timing belt.a worn out belt will throw a code for the camshaft sensor even tho its fine.timing belts are reasonably priced but the replacement of one is labor intensive and be pretty expensive.
Thanks, Joel. I had all the belts changed at 109,000; the car now has 192,000. The crank shaft and cam shaft sensor assembly were changed at 135,000.