P0138
#1
P0138
So I got this code today and went to pepboys to have the code pulled.
Notes:
-I don't have a cat, and have had a CEL fixed (sparkplug nonfoulers) these havent given me an issue for over 6 months or so.
-not sure if it popped up on start up or while driving
-only thing I did from when I know it wasn't there to when I noticed it was 1 quick 2-step and I changed my license lights, everything else was normal granny shifting around town
-idle is fine
-2004 8 with 43,000 miles
I've looked up some posts on here but no one really has a defined answer.
Looking for some guidance as i assume this is a common issue.
Notes:
-I don't have a cat, and have had a CEL fixed (sparkplug nonfoulers) these havent given me an issue for over 6 months or so.
-not sure if it popped up on start up or while driving
-only thing I did from when I know it wasn't there to when I noticed it was 1 quick 2-step and I changed my license lights, everything else was normal granny shifting around town
-idle is fine
-2004 8 with 43,000 miles
I've looked up some posts on here but no one really has a defined answer.
Looking for some guidance as i assume this is a common issue.
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#8
Evolved Member
iTrader: (38)
The P0138 is the the heater circuit for the rear O2
The P0420 is the below efficiency code that you'll throw when running no cat.
What I would look at first is the wiring from the rear O2, to the connector and into the cabin. You may find a broken/damaged wire. If not I'd likely replace the rear O2 sensor
The P0420 is the below efficiency code that you'll throw when running no cat.
What I would look at first is the wiring from the rear O2, to the connector and into the cabin. You may find a broken/damaged wire. If not I'd likely replace the rear O2 sensor
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