2005 Ford Ranger DTC P0175 Engine to lean

JAKESM87

MEMBER
2005 FORD RANGER
6 CYL
2WD
MANUAL
110,000 MILES

Engine code keeps coming on after about 800k I have an after market knn air intake and modifided exshaust removed 3 cat and installed hi flow cat 2 and a half inch to a hi flow trush mulfer and dumped it before real axle some one said the mass air flow sensor might be bad because when I bought the truck some one had modified the old intake and used silcon around the sensor shoul I look at 02 sensors or should I look at the mass air flow sensor?

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

System too rich

A code P0175 may mean that one or more of the following has happened:

The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can cause the MAF to become dirty if the filter is over-oiled
There could be a vacuum leak.
There could be a fuel pressure or delivery problem
Possible SolutionsPossible solutions include:

Inspect all vacuum and PCV hoses, replace if necessary
Clean the MAF sensor. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
Inspect fuel lines for cracks, leaks, or pinches
Check the fuel pressure at the fuel rail
Check the fuel injectors, they may be dirty. Use fuel injector cleaner or get them professionally cleaned/replaced.
Check for an exhaust leak before the first oxygen sensor (this is unlikely to cause the problem, but it is possible