Codes P0173, P0170, P0171 and P0174?

IBINIB

MEMBER
2005 KIA SPORTAGE
2.7L
V6
2WD
AUTOMATIC
197,000 MILES

I have a vacuum leak! The exhaust system shakes and rattles, but I don't hear anything on the cat! I have checked everywhere hoses, intake manifold, PVC, throttle body and all sensors. Fuel pump and brake booster. The vacuum test reads at 10 I've tested injectors for power and any signs of leaks. Replaced the O-rings, I recently replaced 3 O2 sensors B1-S1 B1-S2 and B2-S2.
I have attached this freeze frame data.

Please help.
Mark

5 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,207 POSTS

I don't see the freeze frame data, but these codes can be caused by an exhaust leak as well.

here are guides to help us fix the problem:

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

And follow this guide when the engine is cold:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Please let us know what you find. We are interested to see what it is.

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Monday, October 3rd, 2022 AT 4:07 PM

IBINIB

MEMBER
4 POSTS

I will resend the freeze frame data.

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Monday, October 3rd, 2022 AT 4:49 PM

KEN L

MASTER CERTIFIED MECHANIC
47,207 POSTS

If the exhaust system is not leaking and no intake leaks it looks like from these reading the MAF sensor needs to be replaced. I would get a new one and not try to clean the sensor because it is too far gone. Here is the location of the sensor in the images below. Check out the images (below). Please let us know what happens. Clear the codes after the repair.

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