CEL and Traction light - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

red_frs · 02-19-2023, 04:03 AM

I recently installed Tsudo UEL headers onto my car, after a couple of weeks I got a CEL and traction light. The code is P0171, I've replaced my fuel ratio sensor and cleaned the throttle body. Can't seem to figure out what wrong. I also made sure to get an OFT2 tune with the headers as well.

x808drifter · 02-19-2023, 05:38 AM

Quote:

Originally Posted by red_frs

I recently installed Tsudo UEL headers onto my car, after a couple of weeks I got a CEL and traction light. The code is P0171, I've replaced my fuel ratio sensor and cleaned the throttle body. Can't seem to figure out what wrong. I also made sure to get an OFT2 tune with the headers as well.

Everything bolded has zero to deal with a TCS light.
Maybe if the car was slipping with the small increase in power.
Maybe caused by the tune but both are unlikely.

CEL might be from the tune.
Also might be from the TCS light.

soundman98 · 02-19-2023, 10:16 AM

you've got 2 separate problems. i would investigate the engine code first.

NoHaveMSG · 02-20-2023, 11:37 AM

Traction light usually comes on with CEL. P0171 is a lean code. Check your header install for exhaust leak first.

WNDSRFR · 02-20-2023, 01:23 PM

Yeah if you have multible CEL's, the traction light comes on too.

Spuds · 02-20-2023, 06:35 PM

Do you know how to log or look at live engine parameters with your OFT? That would help.

Also, what tune did you load to the ecu?

Jollibee86 · 02-21-2023, 08:11 PM

P0171 turns on both traction light and CEL. Seems like an exhaust leak to me.

Tcoat · 02-21-2023, 10:02 PM

Quote:

Originally Posted by Jollibee86

P0171 turns on both traction light and CEL. Seems like an exhaust leak to me.

Many codes turn both lights on. It indicates that "limp mode" is active. It will also reduce the revs it will let you do and cruise won't work.
It is explained in the owners manual.

soundman98 · 02-22-2023, 12:04 AM

Quote:

Originally Posted by Tcoat

Many codes turn both lights on. It indicates that "limp mode" is active. It will also reduce the revs it will let you do and cruise won't work.
It is explained in the owners manual.

who has time to read that?!?

02-19-2023, 04:03 AM	#1
red_frs Junior Member Join Date: Feb 2023 Drives: 2013 Automatic Scion FRS Location: Louisiana Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	CEL and Traction light I recently installed Tsudo UEL headers onto my car, after a couple of weeks I got a CEL and traction light. The code is P0171, I've replaced my fuel ratio sensor and cleaned the throttle body. Can't seem to figure out what wrong. I also made sure to get an OFT2 tune with the headers as well.

02-19-2023, 10:16 AM	#3
soundman98 ProCrastinationConsultant Join Date: Sep 2013 Drives: '14 Ranger, '18 Tacoma 4Dr LB Location: chicago-ish Posts: 11,330 Thanks: 35,240 Thanked 13,675 Times in 6,782 Posts Mentioned: 98 Post(s) Tagged: 0 Thread(s)	you've got 2 separate problems. i would investigate the engine code first. __________________ "The time you enjoy wasting is not wasted time"

02-20-2023, 06:35 PM	#6
Spuds The Dictater Join Date: Apr 2017 Drives: '13 Red Scion FRS Location: MD, USA Posts: 9,657 Thanks: 26,704 Thanked 12,715 Times in 6,298 Posts Mentioned: 88 Post(s) Tagged: 0 Thread(s)	Do you know how to log or look at live engine parameters with your OFT? That would help. Also, what tune did you load to the ecu? __________________ If a picture is worth a thousand words, a model is worth ten thousand pictures. Also: "Build Thread"

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