Error code help 2003 F-150
Thread Starter
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Not a liberal...
Joined: Jul 2006
Posts: 6,635
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From: Cut & Shoot, Texas
Error code help 2003 F-150
My buddy here at work has an '03 F-150 with a 4.2L V6. His check engine light came on two days ago. He had the code read and it is P1131.
Can anyone shed some light as to what this code means and where he should start to look?
Thanks in advance.
Can anyone shed some light as to what this code means and where he should start to look?
Thanks in advance.
Postmaster
Joined: Oct 2006
Posts: 4,171
Likes: 12
From: SE Texas
P1131 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1.
Typically this code or a P1132 indicates that the primary o2 sensors are at the end of their life,and need replaced.
JL
Typically this code or a P1132 indicates that the primary o2 sensors are at the end of their life,and need replaced.
JL
Elder User
Joined: Nov 2001
Posts: 892
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From: Duluth, MN
Don't just replace it. Test to see if you really do have a LEAN condition. Check for vacuum leaks. Possibly fuel pressure lower then spec. Could be an exhaust leak on bank 1 before the sensor causing excessive O2 to enter the pipe....
Postmaster
Joined: Oct 2006
Posts: 4,171
Likes: 12
From: SE Texas
Originally Posted by Wilber15
Don't just replace it. Test to see if you really do have a LEAN condition. Check for vacuum leaks. Possibly fuel pressure lower then spec. Could be an exhaust leak on bank 1 before the sensor causing excessive O2 to enter the pipe....
No switching is a bad sensor,not just a lean condition.
JL
Thread Starter
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Not a liberal...
Joined: Jul 2006
Posts: 6,635
Likes: 4
From: Cut & Shoot, Texas
A little background. He said that he had the truck serviced at Ford and they cleaned the injectors the week before. Could this have anything to do with his problem now?
Appreciate you guys helping out with this.
Appreciate you guys helping out with this.
