Check engine codes P0171, P1170, C1201, C1231, and c1241 HELP - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Crystalwhitebrzsti · 05-11-2019, 03:58 PM

Anyone had all these thrown at the same time?

Backstory:

I have a full blown kit with injectors, exedy clutch, DW 300c fuel pump... today while driving in my neighborhood at maybe 12mph I looked down and noticed the CEL and traction light were on. I turned around and went back home. Car runs fine, seemingly. I pulled the codes via EcuTek... does anyone else have any ideas? I purchased some plugs today as they are overdue. Tomorrow I plan to make sure everything is connected well, and kind of go through the car.. Thanks in advance any and all with advice!

RZNT4R · 05-11-2019, 04:19 PM

System lean, port injector performance, ABS/VSC disabled by PCM. Engine wants more fuel, topping out fuel trims but fueling is normal under direct injection. Anything about your mods spring to mind? Diagnosing a car over the internet is already hard, diagnosing a modded one is extraordinarily so, but with the detection logic on those codes, first thing I'd check is fuel pressure on the PFI side.

The last two codes are steering angle sensor related, I'd wager they're not active codes since they're the kind of codes that are seen with low system voltage during or after a car has been left KOEO and drained the battery too far.

humfrz · 05-11-2019, 04:26 PM

Quote:

Originally Posted by Crystalwhitebrzsti

Anyone had all these thrown at the same time?

Backstory:

I have a full blown kit with injectors, exedy clutch, DW 300c fuel pump... today while driving in my neighborhood at maybe 12mph I looked down and noticed the CEL and traction light were on. I turned around and went back home. Car runs fine, seemingly. I pulled the codes via EcuTek... does anyone else have any ideas? I purchased some plugs today as they are overdue. Tomorrow I plan to make sure everything is connected well, and kind of go through the car.. Thanks in advance any and all with advice!

@Mr.ac - any suggestions … ??

humfrz

Mr.ac · 05-11-2019, 07:29 PM

No sure @humfrz
When my tracktion control and CEL came on my code was a P1441 if I recal.
It only happened after slipped the rear tires a bit during a light rain. I cleared the code and it didn't came back.

Hopefully it's nothing just a bug but let us know what code it is. Since you have more mods on it, it might be more difficult to pin point it.

Crystalwhitebrzsti · 05-11-2019, 07:41 PM

@RZNT4R I really appreciate the response. I haven’t had a chance to look over anything yet. Nothing comes to mind as far as mods. Been running strong for a year now with no issues. How would one go about checking fuel pressure? I will search it as well. Thanks again.

humfrz · 05-11-2019, 07:50 PM

Quote:

Originally Posted by Mr.ac

No sure @humfrz
When my tracktion control and CEL came on my code was a P1441 if I recal.
It only happened after slipped the rear tires a bit during a light rain. I cleared the code and it didn't came back.

Hopefully it's nothing just a bug but let us know what code it is. Since you have more mods on it, it might be more difficult to pin point it.

What! No fires? - no Civic purchase?

humfrz

Crystalwhitebrzsti · 05-11-2019, 07:56 PM

@hmfrz and @Mr.ac thanks for responding! I cleared the codes on EcuTek and then started the car.... they were off. I haven’t driven it or done any logs yet. Maybe it was a fluke?

Mr.ac · 05-11-2019, 10:19 PM

Quote:

Originally Posted by Crystalwhitebrzsti

@hmfrz and @Mr.ac thanks for responding! I cleared the codes on EcuTek and then started the car.... they were off. I haven’t driven it or done any logs yet. Maybe it was a fluke?

Quote:

Originally Posted by humfrz

What! No fires? - no Civic purchase?

humfrz

No on this thread. LOL

It could have been some random thing the traction control didn't like.
Mine didn't come back after I cleared it.

humfrz · 05-11-2019, 10:36 PM

Quote:

Originally Posted by Crystalwhitebrzsti

@hmfrz and @Mr.ac thanks for responding! I cleared the codes on EcuTek and then started the car.... they were off. I haven’t driven it or done any logs yet. Maybe it was a fluke?

Yep, I reckon that sometimes they just "hiccup" -

humfrz

Crystalwhitebrzsti · 05-11-2019, 11:26 PM

I will update on what I find tomorrow if anything..

Crystalwhitebrzsti · 05-30-2019, 07:45 AM

As an update, I think this was just a bad exhaust leak? The down pipe from the turbo had very loose bolts that I re-torqued and applied thread locker to. After clearing the codes I haven’t had anymore issues.

05-11-2019, 03:58 PM	#1
Crystalwhitebrzsti Member Join Date: Oct 2014 Drives: Crystal white brz Location: North carolina Posts: 38 Thanks: 1 Thanked 4 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Check engine codes P0171, P1170, C1201, C1231, and c1241 HELP Anyone had all these thrown at the same time? Backstory: I have a full blown kit with injectors, exedy clutch, DW 300c fuel pump... today while driving in my neighborhood at maybe 12mph I looked down and noticed the CEL and traction light were on. I turned around and went back home. Car runs fine, seemingly. I pulled the codes via EcuTek... does anyone else have any ideas? I purchased some plugs today as they are overdue. Tomorrow I plan to make sure everything is connected well, and kind of go through the car.. Thanks in advance any and all with advice!

05-11-2019, 07:29 PM	#4
Mr.ac [insert cool phrase here] Join Date: Aug 2015 Drives: BRZ Premium Location: Central Coast CA Posts: 2,369 Thanks: 709 Thanked 1,559 Times in 930 Posts Mentioned: 30 Post(s) Tagged: 0 Thread(s)	No sure @humfrz When my tracktion control and CEL came on my code was a P1441 if I recal. It only happened after slipped the rear tires a bit during a light rain. I cleared the code and it didn't came back. Hopefully it's nothing just a bug but let us know what code it is. Since you have more mods on it, it might be more difficult to pin point it. __________________ New daily driver - Subaru BRZ Premium Weekend fun/track car - '91 MR2 Turbo Gen3 Old daily driver - '88 MR2 Supercharged

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05-11-2019, 04:19 PM	#2
RZNT4R Professional Mechanic Join Date: Apr 2010 Drives: 2017 86 6MT Oceanic Location: Quebec, Canada Posts: 789 Thanks: 17 Thanked 633 Times in 371 Posts Mentioned: 12 Post(s) Tagged: 0 Thread(s)	System lean, port injector performance, ABS/VSC disabled by PCM. Engine wants more fuel, topping out fuel trims but fueling is normal under direct injection. Anything about your mods spring to mind? Diagnosing a car over the internet is already hard, diagnosing a modded one is extraordinarily so, but with the detection logic on those codes, first thing I'd check is fuel pressure on the PFI side. The last two codes are steering angle sensor related, I'd wager they're not active codes since they're the kind of codes that are seen with low system voltage during or after a car has been left KOEO and drained the battery too far.

05-11-2019, 07:41 PM	#5
Crystalwhitebrzsti Member Join Date: Oct 2014 Drives: Crystal white brz Location: North carolina Posts: 38 Thanks: 1 Thanked 4 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	@RZNT4R I really appreciate the response. I haven’t had a chance to look over anything yet. Nothing comes to mind as far as mods. Been running strong for a year now with no issues. How would one go about checking fuel pressure? I will search it as well. Thanks again.

05-11-2019, 07:56 PM	#7
Crystalwhitebrzsti Member Join Date: Oct 2014 Drives: Crystal white brz Location: North carolina Posts: 38 Thanks: 1 Thanked 4 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	@hmfrz and @Mr.ac thanks for responding! I cleared the codes on EcuTek and then started the car.... they were off. I haven’t driven it or done any logs yet. Maybe it was a fluke?

05-11-2019, 11:26 PM	#10
Crystalwhitebrzsti Member Join Date: Oct 2014 Drives: Crystal white brz Location: North carolina Posts: 38 Thanks: 1 Thanked 4 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I will update on what I find tomorrow if anything..

05-30-2019, 07:45 AM	#11
Crystalwhitebrzsti Member Join Date: Oct 2014 Drives: Crystal white brz Location: North carolina Posts: 38 Thanks: 1 Thanked 4 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	As an update, I think this was just a bad exhaust leak? The down pipe from the turbo had very loose bolts that I re-torqued and applied thread locker to. After clearing the codes I haven’t had anymore issues.

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