How much will it cost to fix codes

Question

My car wont pass smog, these are the things wrong with it.

PO 170 PO 335 PO 120

I want to know approx. how much to fix? and is it worth the work? its a 2000 Mitsubushi Diamente

I paid $800 for it.

Answer 1

P0170 Fuel trim lean Bank 1

P0335 Crankshaft position sensor circuit malfunction

P0120 Throttle position circuit malfunction

For P0170 does the engine burn oil ? They usually do. For a fuel trim lean vacuum leaks are the most common cause such as the ruptured PCV valve hose which are one of few places, The CKP and the TPS these would be under a hundred dollars , if there is not too much of a oil leak this would be worth fixing If you resell this with the repair its value which depends on Paint, Body , it resell 1,000.