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Check engine light on

Tiny
THIN MAN
  • MEMBER
  • 1996 LINCOLN MARK III
  • 166,685 MILES
I am confused, I have had both o2 sensors and catalytic converter on passenger side replaced on my car. Because both bank 2 sensors were coming up with heater malfunction. So I changed them, after drive cycle check engine light came back on, so I changed my leaking catalytic converter. Drive cycle again, light comes back on. Am I missing something?
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Monday, April 9th, 2018 AT 6:00 AM

7 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning.

Lets start with the original codes. What were the codes?

Roy
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Monday, April 9th, 2018 AT 7:29 AM
Tiny
THIN MAN
  • MEMBER
  • 3 POSTS
P1151 lack of h025s-21, h02s signal low input.
P0161 ho2s-22 bank 2 sensor 2 heater circuit malfunction.
P0401 insufficient EGR flow detected.
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Monday, April 9th, 2018 AT 8:42 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
The 401 is common for the delta pressure sensor.

Chart below.
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Monday, April 9th, 2018 AT 9:21 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay.

1151 chart and possibilities below.

Roy
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Monday, April 9th, 2018 AT 9:23 AM
Tiny
THIN MAN
  • MEMBER
  • 3 POSTS
That may be correct, but I have heard that because of the 02 sensor showing, that is what causes the EGR error.
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Monday, April 9th, 2018 AT 9:24 AM
Tiny
ASEMASTER6371
  • MECHANIC
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The 161 is for the ABS pump motor. It may be internally shorted.

Roy
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Monday, April 9th, 2018 AT 9:26 AM
Tiny
ASEMASTER6371
  • MECHANIC
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The 401 code, yes.

Roy
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Monday, April 9th, 2018 AT 9:28 AM

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