Trouble code P0251 means:Injection pump A rotor/cam malfunction
Trouble code P0000 means: No Fault Found
P0139 02 Sensor Circuit Slow Response (Bank 1 Sensor 2)
Are you sure about that code? I'm not seeing it in the ODBII code list. http://autorepair.about.com/od/obdcodedatabase/a/OBD_1996_year.htm
You have a problem with the EGR system.
It is the police code for Armed Robbery
P0404 means:Exhaust gas recirculation circuit range/performance
Code 2035 or specifically P2035 is Brand Specific. So without knowing your car, make or model we cannot help you.
Trouble code P0340 means:Camshaft position sensor circuit malfunction
These codes are NOT universal across the country and could mean different things in different agencies.
Trouble code P0001 means: Fuel volume regulator control circuit open
Trouble code P1744 means: TCC system mechanically stuck in off position
The computer has set a code that will have to do with the electronic throttle system. Have it checked for codes with a scanner.