Multiple codes p171 P1074 and P0430

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

3 Replies

ASEMASTER6371

MECHANIC
52,797 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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