p0174

[fatcat]

Now before you chide me for not looking in previous threads I just changed both the manifold o2 sensors and I just checked the fuel pressure and it's steady at 42 psi does anyone know what else it could be?... and the car idles great and starts right up.

[whitdog54]

Re: p0174

Clean your MAF sensor. Clear the code. Comes back on, check for vacuum leaks. Also do you notice any exhaust leaks at the manifold? I was throwing this code, then tightened up my headers and it went away.

[fatcat]

Re: p0174

do you think getting the fuel injectors flushed might do it?

[fatcat]

Re: p0174

Update: I did some research and found out that the p0174 code is for the o2 sensor behind the cat so I replaced the o2 sensor and that seemed to do it. So if anyone gets this code check out that sensor.

[whitdog54]

Re: p0174

Yea, that too, i through that code when i was running open headers.

[fatcat]

Re: p0174

Ok The stupid code came back!!! I can clear it for a week or two but then it just comes on. The car runs exactly the same just with the ses light. Does anyone have a clue?

[ssms5411]

Re: p0174

It measures the air after the CAT and will throw a code if not enough air flow or too much air flow is flowing. So if you have a high flow CAT or its straight through then you need a O2 sensor delete , or a flash to get rid of it perminatly.