Code P0141, running rough?

Tiny
LIONELL8732
  • MEMBER
  • 2007 MERCURY MILAN
  • 2.3L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 191,000 MILES
Hello, I need some help trying to figure out what's going on. I attached a video for you all to hear the engine running. I recently changed the ignition coils, spark plugs, fuel injectors, downstream oxygen sensor. I also stripped down both connectors and replaced them with new connectors for the up and down oxygen sensors. Hooked up the scan tool and in getting a P0141 on every starts up. The freeze frame shows the downstream sensor reading at 0 voltage and upstream at 22 voltage. This is the only code that's on.
Saturday, May 11th, 2024 AT 8:09 AM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,867 POSTS
Hi,

The problem is likely a wiring issue. I attached the diagnostics below. They are somewhat extensive and will require a bidirectional scanner.

Take a look through the diagnostics and let me know if you are comfortable performing them.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-wiring

Let me know.

Take care,

Joe

See pics below.
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Saturday, May 11th, 2024 AT 9:33 PM
Tiny
LIONELL8732
  • MEMBER
  • 143 POSTS
Checked all the wiring and the wiring is fine. May have to take it to the dealership for further assistance.
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Thursday, May 30th, 2024 AT 6:33 AM

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