answersLogoWhite

0


Best Answer

Most likely there is another issue which may not show up on a PCM code scan. The O2 sensor is reading a lean mixture so, the PCM is giving the engine more fuel. Check for vacuum leaks. The PCM will also richen the mixture to compensate for other problems.

User Avatar

Wiki User

14y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: Why does a 1993 Mercury Villager get awful gas mileage after replacing the O2 sensor?
Write your answer...
Submit
Still have questions?
magnify glass
imp