Multiple codes p171 P1074 and P0430

Tiny
MROCHA
  • MEMBER
  • 2007 FORD EXPEDITION
  • 5.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 159,000 MILES
Hello, my SUV is showing codes p171 p1074, and p0430. Replaced EGR purge, MAF, bank2 sensor 1 o2 sensor. Car will turn over shriek like if Bendix was stuck, then I have to turn key 3 times before cranking to get it to start. Puffed smoke they EGR intake to manifold no leaks found this way. I have access to scanner with live data. Codes still on and running rough mpg currently at 8. Thank you
Friday, October 25th, 2019 AT 12:44 PM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Good afternoon,

The 430 is a code for the bank 2 catalytic converter. That needs to be replaced.

The 171,174 codes are lean running codes. I would start by checking the fuel pressure. Low fuel pressure is the most common reason for this code.

https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Roy
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Friday, October 25th, 2019 AT 2:12 PM
Tiny
MROCHA
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  • 6 POSTS
Hi, thank you for answering. I'll check the pressure and get back with some numbers. Thank you
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Friday, October 25th, 2019 AT 2:43 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
You are welcome.

Always glad to help.

Roy
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Friday, October 25th, 2019 AT 3:00 PM

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