2007 entourage code p2187 p2189 p0171 p0174 keeps coming on cleaned mass air flow sensor with crc cleaner dont see any vacuum leaks ????help?

SOURCE: OBD codes P0171 and P0174

Look on the passenger side of the intake at the rubber elbow attached to the big black plastic tube and then to the intake manifold. Make sure it is not sucking shut and maybe a small hole in the bottom of it.

SOURCE: Mass Air Flow Sensor, oxygen sensor and coil plugs

look for vacuum leaks the last 4 codes are lean codes
primarily lookm at the pcv hose noturious for collapsing

SOURCE: I have a 2000 Taurus SES. Check engine light came

sounds like a maf issue was it new?171/4 is usually uim vac leak

SOURCE: we have a 99 ford

Your paid people have never diagnosed ,the lean condition you have.

If it points to MAF Sensor,new or old,why did they stop
testing. Don't have a Data Base they subscribe to?
Don't have that kind of diagnostic experience?

Need to see the system on paper, and follow a trouble
chart or use common sense.

In the end, all you probably have, is a vacuum leak somewhere

PAUL MC G

• 1280 Answers
• Posted on Aug 31, 2011

SOURCE: 2007 Hyundai Entourage codes P2187,

I've come across these codes before. In almost every case there was an air leak in the intake air hose (hose between the engine air filter & the throttle body). Inspect this hose & tubes attached to it. This is especially true when the lean code includes the comment 'at idle'
P2187 - System too lean at idle Bank 1
P0174 - System too lean Bank 2
P2189 - System too lean at idle Bank 2
P2195 = HO2S Signal Biased/Stuck Lean (Bank 1 Sensor 1)
P2270 = HO2S Signal Stuck Lean (Bank 1 Sensor 2)
P2272 = HO2S Signal Stuck Lean (Bank 2 Sensor 2)

P2187 & P2189 = In order to provide the best possible combination of drivability, fuel economy and emission control, the PCM uses a closed loop air/fuel metering system. The PCM monitors the HO2S signal voltage and adjusts fuel delivery based in closed loop fuel control. Changes in fuel delivery will be indicated by the long-term and the short-term fuel trim values. The ideal fuel trim value is around 0%. The PCM will add fuel when the HO2S signal is indicating a lean condition. Additional fuel is indicated by fuel trim values that are above 0%. The PCM will reduce fuel when the HO2S signal is indicating a rich condition. Reduction in fuel is indicated by fuel trim values that are below 0%. The DTC relevant to fuel trim will be set when the amount reaches excessive levels because of a lean or rich condition