1998 Mitsubishi Galant P0170 code

BADHAB31

MEMBER
1998 MITSUBISHI GALANT
4 CYL
FWD
AUTOMATIC
16,800 MILES

I had a P0170 code. I checked for vacuum leaks, replace gas cap and added B-12 to the tank. I then erased codes and drove about 67 miles. Check engine light came back on. Now code is P0125. So I replaced the thermostat, erased codes and drove. Light came back on, P0170 again. I'm going to replace the fuel filter tomorrow thinking it may be fuel pressure problem. If that don't do it, what would you suggest next? And then? And so onl
Thank you in advance for you reply.

1 Reply

BLUELIGHTNIN6

MECHANIC
16,542 POSTS

Check air flow sensor, fuel injectors, engine coolant temperature sensor, intake air temp. Sensor, barometric or MAP sensor, heated oxygen sensor(s) and related connectors & harnesses to these components. Any or all of these could cause this fault code to appear. Also check fuel pressure, intake air leaks, and check for a cracked manifold.