Feel a little 'bump' when I brake when CEL is on. - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

kev0 · 09-11-2019, 10:47 PM

P0171 lean code. I've had it for a while now. I've noticed that when the light is on, and I brake, I feel a subtle 'bump' right before I come to a stop. When I clear the code, the car brakes 100% smoothly. How could a light cause my car to have that bump when I brake?

jeffchap · 09-11-2019, 10:51 PM

Auto or manual?

Sent from my moto g(6) using Tapatalk

kev0 · 09-12-2019, 12:45 AM

Quote:

Originally Posted by jeffchap

Auto or manual?

Sent from my moto g(6) using Tapatalk

Forgot to mention! Thanks. It's an automatic

radroach · 09-12-2019, 02:49 AM

Hm. I kinda experienced this with a different CEL (ABS sensor broken) causing limp mode, every time I came to a stop the car would almost stall.

kev0 · 09-12-2019, 03:03 AM

Quote:

Originally Posted by radroach

Hm. I kinda experienced this with a different CEL (ABS sensor broken) causing limp mode, every time I came to a stop the car would almost stall.

Well shit. I have an ABS code too (C1201). I didn't think too much of it. The slip lights only come on sometimes. Even when the light isn't on, I still feel the bump. So weird. My RPM's drop when I come to a stop and would sometimes almost stall as well but I'm assuming that's because of the lean issue from my P0171 code.

RZNT4R · 09-12-2019, 08:17 AM

Sounds like

http://www.ft86club.com/forums/showthread.php?t=134579

But as always, if you've got fault codes, have those issues fixed FIRST.

radroach · 09-12-2019, 12:00 PM

@kev0 limp mode was a pretty severe occurrence in my case. I was unable to rev past 3500 rpm, scary on the highway.

Take care of the ABS problem first and clear codes and see if your lean code goes away.

RZNT4R · 09-12-2019, 12:21 PM

No.

C1201 is there to inform you that there is an engine management problem. Repair the engine control system malfunction and it will go away by itself.

09-11-2019, 10:47 PM	#1
kev0 Senior Member Join Date: Feb 2018 Drives: '14 Location: Midwest Posts: 485 Thanks: 246 Thanked 99 Times in 76 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Feel a little 'bump' when I brake when CEL is on. P0171 lean code. I've had it for a while now. I've noticed that when the light is on, and I brake, I feel a subtle 'bump' right before I come to a stop. When I clear the code, the car brakes 100% smoothly. How could a light cause my car to have that bump when I brake?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Brake firmness/pedal feel	Hyper4mance2k	Suspension \| Chassis \| Brakes -- Sponsored by 949 Racing	40	05-22-2019 01:22 PM
New Ferodo Brake Pads Feel Sticky	kodyo	Suspension \| Chassis \| Brakes -- Sponsored by 949 Racing	15	04-30-2018 04:22 PM
Brake feel	bg15	Suspension \| Chassis \| Brakes -- Sponsored by 949 Racing	7	07-27-2017 02:18 PM
Brake Feel Enhancement	Capt Spaulding	Suspension \| Chassis \| Brakes -- Sponsored by 949 Racing	7	04-06-2016 12:33 PM
Odd brake pedal feel, fade?	yomny	Suspension \| Chassis \| Brakes -- Sponsored by 949 Racing	27	09-11-2012 01:29 PM

09-12-2019, 02:49 AM	#4
radroach Senior Member Join Date: Feb 2013 Drives: car Location: usa Posts: 2,162 Thanks: 1,028 Thanked 867 Times in 530 Posts Mentioned: 35 Post(s) Tagged: 1 Thread(s)	Hm. I kinda experienced this with a different CEL (ABS sensor broken) causing limp mode, every time I came to a stop the car would almost stall.

09-12-2019, 08:17 AM	#6
RZNT4R Professional Mechanic Join Date: Apr 2010 Drives: 2017 86 6MT Oceanic Location: Quebec, Canada Posts: 789 Thanks: 17 Thanked 634 Times in 371 Posts Mentioned: 12 Post(s) Tagged: 0 Thread(s)	Sounds like http://www.ft86club.com/forums/showthread.php?t=134579 But as always, if you've got fault codes, have those issues fixed FIRST.

09-12-2019, 12:00 PM	#7
radroach Senior Member Join Date: Feb 2013 Drives: car Location: usa Posts: 2,162 Thanks: 1,028 Thanked 867 Times in 530 Posts Mentioned: 35 Post(s) Tagged: 1 Thread(s)	@kev0 limp mode was a pretty severe occurrence in my case. I was unable to rev past 3500 rpm, scary on the highway. Take care of the ABS problem first and clear codes and see if your lean code goes away.

09-12-2019, 12:21 PM	#8
RZNT4R Professional Mechanic Join Date: Apr 2010 Drives: 2017 86 6MT Oceanic Location: Quebec, Canada Posts: 789 Thanks: 17 Thanked 634 Times in 371 Posts Mentioned: 12 Post(s) Tagged: 0 Thread(s)	No. C1201 is there to inform you that there is an engine management problem. Repair the engine control system malfunction and it will go away by itself.

User Name		Remember Me?
Password