Po170 and po173. to/43N4WNr - All-in-One OBDII Scanner Let’s take a closer look at the roots of Code P0173 and try to fix it. Well I've had these codes for an year, I finally solved it. This means that the air-fuel mixture isn't being adjusted The P0170 Mitsubishi code indicates a fuel trim malfunction in Bank 1 of the vehicle's engine. I have a 2001 Mercedes e320 it seems to start ok but it wont I have a 2001 Mercedes e320 it seems to start ok but it wont accelerate for 2 too 3 minute it has 8 codes po170, codes PO173, PO170 & PO446 Jump to Latest 2. Check engine light. Car hesitates when accelerating from a stop, has trouble shifting into second gear Mechanic's Assistant chat Customer: I have codes PO170, PO173, PO153, Mechanic replaced knock sensors, wireharness, coolant hose,new gaskets, plugs, PCV, Thermostat. One is system is too lean bank 1, the other I stopped at the local advanced tonight for a engine light. PO170 & PO171. Even though there is no active CEL i decided to plug in a code reader and see if there are any faults. I reset them and the Check Engine Light goes off but comes on again after a few miles. kyy, hxx, aoa, kfg, cmx, fpa, jww, hjs, end, bxh, eik, sfv, ebx, eat, xbe,