Ford Taurus 2001 lx running lean

Asked by GuruTBH96 Jun 25, 2018 at 12:46 PM about the 2001 Ford Taurus LX

Question type: Maintenance & Repair

It's pulling three codes p1151, both downstream o2
senser are saying heater circuit malfunction. I can't
remember the codes on top of my head.

I've replaced the all sensers
I've checked the intake for vacuum leaks nothing.
I need some help finding the problem. Before
smog.

2 Answers

103,215

Try checking fuel pressure (pump, filter, regulator, injectors), double check for vacuum leaks, and check the EGR if it's sticking or stuck open. Then check exhaust for leaks.

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