P Codes diagnostics and Probable Causes
Member
Joined: Oct 2020
Posts: 43
Likes: 1
Got a po171 and po174 lean on bank 1 and lean on bank 2 any thoughts what I should b looking for I’ve had truck a few weeks it’s a 99 4.2 2wd and have cleared the code a few times and outa everything that pops up this is the consistent ones
99 Stepside 4.2L 5spd
Joined: Jun 2025
Posts: 6
Likes: 0
From: Orlando
Help
Getting a P1518 code, Intake Actuator (stuck Open), is this one of those just replace parts or see if it can be cleaned and put together?
also codes:
P430
P174 and 171
P136
Cats looked to been gutted, even square cuts on them that are welded.
also codes:
P430
P174 and 171
P136
Cats looked to been gutted, even square cuts on them that are welded.
98 F150 5.4L E40D/4R100
Joined: Nov 2006
Posts: 28,489
Likes: 7,618
From: MI
Do you know what you're driving?
Senior Member
Joined: Apr 2023
Posts: 4,263
Likes: 1,382
From: Near Salt Lake City
Senior Member
Joined: Apr 2023
Posts: 4,263
Likes: 1,382
From: Near Salt Lake City
Some basics of O2 sensor numbering
Bank one and bank 2, Bank 1 is the bank that has the number 1 cylinder
Sensor 1 and 2
Sensor 2 is a rear sensor, sensor 1 is a front one
Ford numbers them sensor 11, 12 21 and 22
Bank one and bank 2, Bank 1 is the bank that has the number 1 cylinder
Sensor 1 and 2
Sensor 2 is a rear sensor, sensor 1 is a front one
Ford numbers them sensor 11, 12 21 and 22