Question

1997 Ford Thunderbird LX 4.6L, what is the most common fix for a P1151 error code?

Answer 1

P1151 Bank 2 lean condition

What happening is the 02 sensor is correcting rich for a overly lean condition, common causes are vacuum leaks especially at the PCV valve and hose, Its the occasionally rough idle, this can be from ignition right where the coil wire goes to the distributor cap,it has a tendecy for corrosion,and also sparkplug wire arcing to ground,