P0178 – Fuel composition sensor -low input

By BAT Team (Contact Me)
Last Updated 2015-11-18
A site with free advice from mechanics.

Trouble Code	Fault Location	Probable Cause
P0178	Fuel composition sensor -low input	Wiring short to earth, fuel composition sensor, ECM

We recommend Torque Pro

BAT Team Discussions for P0178

Idle issues 99 Lumina
OK, here's new wrinkle that I discovered today: Ambient temp today is about 70 degrees. Started right up and ran well to work (about 10 minutes). Was at work for 2 hours, tried starting the engine and it stalled immediately after starting. Engine startup temp was 153. So there goes my heat relat...