Engine lite is on

Asked by Feb 20, 2014 at 07:32 AM about the 2004 Ford F-250 Super Duty XLT 4WD Extended Cab LB

Question type: Maintenance & Repair

Have codes 1131, 1151, 171, &174.

1 Answer

23,405

You certainly have a fuel control problem (always lean). The first place Ford Diagnostics take you is to check the Oxygen sensors - all of them. Then they tell you to look for unmetered air. If you have a scan tool that can read PIDS, I'd check the MAF readings and the O2 sensor readings. Look for a large vacuum leak, air cleaner assembled wrong, messed up PCV or PCV hoses. It's likely that the MAF sensor is bad or very dirty. I've never successfully cleaned one - always had to replace them. It's an expensive guess. Low fuel pressure can also cause lean conditions as well as a MAP sensor failure. All of these components can give eroneous readings without tripping the Check Engine Light - thus the need for a scan tool that can read PIDs and a Technician that knows how to properly diagnose them.

Your Answer

Add photo

Related Questions

Search Ford F-250 Super Duty Questions

Ford F-250 Super Duty Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 780
#2 FordNut
FordNut
Reputation 660
#3 kbro
kbro
Reputation 590
View All

Related Models For Sale

Used Ford F-350 Super Duty
371 Great Deals out of 27,218 listings starting at $2,495
Used Ford F-150
2,424 Great Deals out of 210,079 listings starting at $895
Used Chevrolet Silverado 2500HD
330 Great Deals out of 26,381 listings starting at $2,500
Used Dodge Ram 2500
141 Great Deals out of 5,278 listings starting at $2,500
Used GMC Sierra 2500HD
136 Great Deals out of 13,888 listings starting at $2,650
Used Chevrolet Silverado 1500
1,952 Great Deals out of 159,910 listings starting at $1,995
Used Toyota Tundra
512 Great Deals out of 32,147 listings starting at $2,995
Used GMC Sierra 1500
861 Great Deals out of 64,419 listings starting at $1,500
Used Dodge Ram 1500
438 Great Deals out of 11,486 listings starting at $700
Used Dodge Ram 3500
80 Great Deals out of 2,174 listings starting at $5,950
Used Ford Mustang
314 Great Deals out of 45,684 listings starting at $2,000
Used Ford F-450 Super Duty
42 Great Deals out of 2,643 listings starting at $8,495

Used Cars For Sale

2017 Ford F-250 Super Duty For Sale
9 Great Deals out of 27,724 listings starting at $23,886
2016 Ford F-250 Super Duty For Sale
19 Great Deals out of 5,150 listings starting at $24,995
2015 Ford F-250 Super Duty For Sale
20 Great Deals out of 2,248 listings starting at $13,900
2014 Ford F-250 Super Duty For Sale
15 Great Deals out of 977 listings starting at $11,900
2013 Ford F-250 Super Duty For Sale
21 Great Deals out of 891 listings starting at $11,995