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.
These codes are NOT universal across the country and could mean different things in different agencies.
Trouble code P0340 means:Camshaft position sensor circuit malfunction
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.