JJZ

02 Max turns over but won’t start. Getting codes: P0123, P01121, P01122, P0223, P0113, and P2135...all indicating sensor problems particularly high circuit inputs. Replaced TB, MAF sensor and pedal position sensor...and no change. At wits end, took it to the shop and they diagnosed a failed fuel pump. Want $350 to do it...want to tow it home and save myself $200+ on the pump doing it myself, but am afraid the original codes indicate bigger problems. Any insight? Would limp mode caused by a short or faulty sensor cut fuel and cause fuel pump problems? Don’t want to tow it back home just to have it towed back to the shop. Any insight/help would be appreciated! Thanks in advance

DennisMik

iTrader: (2)

The limp mode is caused by the P0223 code, but limp mode does not cause any reaction/feedback with the fuel pump. You probably don't need a fuel pump, 98% of the times it gets replaced, there is nothing wrong with it. Because the engine is running in limp mode, they are guessing that the pump cannot deliver the amount of fuel necessary.

But since you have replaced the various sensors, all I can say is check the wiring carefully that goes to the throttle and maf. Perhaps a critter got in there and chewed on it or something.

freezer

I'd agree, almost definitely not the pump. Bad wiring most likely cause of those codes simultaneously