P0138 code
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Honda-Tech Member
Joined: Mar 2013
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P0138 code
98 DX, stock engine D16y7 138xxx
I just got this code out of nowhere yesterday.
Backstory, I put on a header, and an inline Magnaflow cat for a Civic EX, the o2 sensors are in the header and after the cat. I used an plug extension to hook up the 2nd sensor. Exhaust is tight no leaks. I've had this setup for over 200 miles... with no issues.
Yesterday I got the check engine light. When I got home I ran the code on my ScanGage II and it gave me P0138. No others. I have cleared it out and driven 20 or so miles, it hasn't come back on.
Also and this may be unrelated, since the code, my idle will occasionaly dip to 550. Normally is has always been 650 or so, at full operating temp. What should it be set at? Is it controlled by the ECU or can I adjust?
Thanks!
I just got this code out of nowhere yesterday.
Backstory, I put on a header, and an inline Magnaflow cat for a Civic EX, the o2 sensors are in the header and after the cat. I used an plug extension to hook up the 2nd sensor. Exhaust is tight no leaks. I've had this setup for over 200 miles... with no issues.
Yesterday I got the check engine light. When I got home I ran the code on my ScanGage II and it gave me P0138. No others. I have cleared it out and driven 20 or so miles, it hasn't come back on.
Also and this may be unrelated, since the code, my idle will occasionaly dip to 550. Normally is has always been 650 or so, at full operating temp. What should it be set at? Is it controlled by the ECU or can I adjust?
Thanks!
Last edited by Tony_SS; May 9, 2013 at 07:08 AM.
If you loved me, you'd all sell me your magic cards to me today
Joined: Oct 2005
Posts: 2,700
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From: Atlantic Ocean Florida
Re: P0138 code
You should have a D16Y7 if it is a 98 DX.
http://en.wikipedia.org/wiki/Honda_D_engine#D16Y7
If you reset it and it did not come back you should be good.
http://en.wikipedia.org/wiki/Honda_D_engine#D16Y7
If you reset it and it did not come back you should be good.
Thread Starter
Honda-Tech Member
Joined: Mar 2013
Posts: 41
Likes: 0
Re: P0138 code
You should have a D16Y7 if it is a 98 DX.
http://en.wikipedia.org/wiki/Honda_D_engine#D16Y7
If you reset it and it did not come back you should be good.
http://en.wikipedia.org/wiki/Honda_D_engine#D16Y7
If you reset it and it did not come back you should be good.
Ok... yes I'm hoping it doesnt come back.. it runs great.. good mpg's.. so I guess I'll wait and see..
Thoughts on the idle issue?
If you loved me, you'd all sell me your magic cards to me today
Joined: Oct 2005
Posts: 2,700
Likes: 0
From: Atlantic Ocean Florida
Re: P0138 code
https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/faqs-frequently-asked-tech-questions-1998336/
Part 5, L. Air intake and idle control.
Maybe before going down that route you should wait for some others to advise also.
Part 5, L. Air intake and idle control.
Maybe before going down that route you should wait for some others to advise also.
Honda-Tech Member
Joined: Mar 2011
Posts: 1,162
Likes: 0
From: Southern California
Re: P0138 code
98 DX, stock engine D16y7 138xxx
I just got this code out of nowhere yesterday.
Backstory, I put on a header, and an inline Magnaflow cat for a Civic EX, the o2 sensors are in the header and after the cat. I used an plug extension to hook up the 2nd sensor. Exhaust is tight no leaks. I've had this setup for over 200 miles... with no issues.
Yesterday I got the check engine light. When I got home I ran the code on my ScanGage II and it gave me P0138. No others. I have cleared it out and driven 20 or so miles, it hasn't come back on.
Also and this may be unrelated, since the code, my idle will occasionaly dip to 550. Normally is has always been 650 or so, at full operating temp. What should it be set at? Is it controlled by the ECU or can I adjust?
Thanks!
I just got this code out of nowhere yesterday.
Backstory, I put on a header, and an inline Magnaflow cat for a Civic EX, the o2 sensors are in the header and after the cat. I used an plug extension to hook up the 2nd sensor. Exhaust is tight no leaks. I've had this setup for over 200 miles... with no issues.
Yesterday I got the check engine light. When I got home I ran the code on my ScanGage II and it gave me P0138. No others. I have cleared it out and driven 20 or so miles, it hasn't come back on.
Also and this may be unrelated, since the code, my idle will occasionaly dip to 550. Normally is has always been 650 or so, at full operating temp. What should it be set at? Is it controlled by the ECU or can I adjust?
Thanks!
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