Code P0191

Tiny
TROYSTERR
  • MEMBER
  • 2010 FORD MUSTANG
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 58,000 MILES
Code p0191 came up. I replaced fuel filter still sputters then replaced fuel rail pressure sensor still sputters, replaced fuel pump still sputters. Please help.
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Friday, August 5th, 2016 AT 5:57 AM

14 Replies

Tiny
HMAC300
  • EXPERT
That is a fuel pressure circuit problem. check fuel pressure with a gauge auto parts rent it. see picture for other causes.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
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Friday, August 5th, 2016 AT 7:02 AM
Tiny
TROYSTERR
  • MEMBER
I have a tuner its data log says fuel jumps from 40 down to 10 shoots up to 75 I guess it is psi.
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Friday, August 5th, 2016 AT 7:11 AM
Tiny
HMAC300
  • EXPERT
Check it at idle not reving it up it should be in the 40 range all the time if not then it is the pump or regulator soit with a gauge not electrically.
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Friday, August 5th, 2016 AT 7:20 AM
Tiny
TROYSTERR
  • MEMBER
Okay thanks, I appreciate this a lot. I replaced fuel pump, fuel filter, fuel rail pressure sensor already.
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Friday, August 5th, 2016 AT 7:26 AM
Tiny
HMAC300
  • EXPERT
Reading your post said you have a tuner and that may be your problem. The fuel pressure should not go below or down to 10 psi under any condition unless it has been shut off for days. The regulator may be part of fuel pump have the fuel pump driver module checked as the tuner may be messing that up causing your problem.
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Friday, August 5th, 2016 AT 9:27 AM
Tiny
TROYSTERR
  • MEMBER
Okay thanks, and god bless ya.
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Friday, August 5th, 2016 AT 10:12 AM
Tiny
KEN
  • ADMIN
If you still get the code you may have a wire that has failed, please do a pin to pin check.

Here is a guide to help you.

https://www.2carpros.com/articles/how-to-check-wiring

Let me know what you find

Best, Ken

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Thursday, August 11th, 2016 AT 8:36 PM
Tiny
TROYSTERR
  • MEMBER
I will, I'm waiting for fuel pump driver module to arrive if still having problem I will check wires thnx
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Friday, August 12th, 2016 AT 8:40 AM
Tiny
TROYSTERR
  • MEMBER
Hey Ken, I installed fuel pump driver module Saturday and fuel pressure is a steady 40 psi drove it for about 30 min. Ran fine hopefully it's fixed haven't drove it since
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Monday, August 15th, 2016 AT 9:29 AM
Tiny
KEN
  • ADMIN
Good to hear, let us know if you need anything else. Please use 2Carpros anytime.

Best, Ken
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Monday, August 15th, 2016 AT 11:50 AM
Tiny
TROYSTERR
  • MEMBER
Code p1000 advance trac, abs lights on dash won't go off. It was wet out I got on it a little hard tires spun lights been on for week
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Saturday, December 17th, 2016 AT 6:10 AM
Tiny
HMAC300
  • EXPERT
Have amechanic check for an abs code to see what is setting it off it will knock off traction as well may be a sensor or rust on sensor. Or a wire broke
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Saturday, December 17th, 2016 AT 7:40 AM
Tiny
TROYSTERR
  • MEMBER
Ok, thnx is there anything I can do kinda short on funds I have a sct tuner can I check anything with that 2010 gt
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Saturday, December 17th, 2016 AT 7:50 AM
Tiny
HMAC300
  • EXPERT
Don't know if they work on abs or not a lot don't they just do engine/trans. Check for rust on sensors as they are magnetic or junk around signal wheel if you can see there.
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Saturday, December 17th, 2016 AT 10:41 AM

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