2006 Honda Pilot codes P0154 & P2247

Hey everyone, I recently purchased a 2006 Honda Pilot EX with 3.5 liter V6 and it had P0154 & P2247 codes listed as current faults. The vehicle appears to be running fine but after I cleared the errors the P0154 reoccurred in a couple of days. I checked the air intake tube and it appears to be cracked on the outside but I'm not sure if it is causing a vacuum leak sufficient to cause these fault codes. What's the best way to determine the severity of the leak or if the engine is running properly not lean or rich. Also there was a code P0706 code if anyone has any feedback on what to troubleshoot for that fault. Below is the freeze frame info

Vehicle Manufacturer: Honda
Vehicle Calibration ID: 37805-PVJ-A790
37809-RGL-A510

Freeze frame information:

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Fuel Status = 0 byte
Engine Load = 40 %
Engine Coolant Temperature = 100.4 °F
Fuel Trim Bank 1 Short Term = -9.375 %
Fuel Trim Bank 1 Long Term = 1.562 %
Fuel Trim Bank 2 Short Term = -7.031 %
Fuel Trim Bank 2 Long Term = 1.562 %
Intake Manifold Pressure = 5.802 psi
Engine RPM = 1,144 rpm
Speed (OBD) = 19.884 mph
Timing Advance = 7 °
Intake Air Temperature = 66.2 °F
Throttle Position(Manifold) = 17.647 %
Relative Throttle Position = 7.451 %

Hey Gurutogo! Both of those codes point directly to a circuit issue with the bank two upstream air/fuel ratio sensor itself, and not a rich or lean problem. This year of Pilot is also a speed density system and not MAF, so that cracked intake tube will have zero impact on fuel control. Still worth fixing, because unfiltered air is bad. :lol: But not for these codes.

If you're interested in testing the wiring to the sensor, let me know and I can walk you through it. There's seven wires at the sensor, but you're only worried about three of them for these codes.

IMO, chances are very good that you'll end up needing a new sensor. Good news is that bank two is the by the radiator on your Pilot, and the sensor is pretty much staring you in the face. :silly: These sensors have also dropped in price over the years, so a new one is reasonable. Go dealer or OE if at all possible. Denso or NTK if not.

Thank you for the quick response. Looks like I'll be swapping out the sensor. I replaced the pipe and got the P0154 fault again. It's probably not related but can you tell me what this little black box is and if I need to determine what tube is missing and replace it?

Gurutogo wrote: It's probably not related but can you tell me what this little black box is and if I need to determine what tube is missing and replace it?

Actually, you're not missing anything! :silly: Pretty sure that's either the transmission breather, or the transfer case breather. One is that box, the other is by the throttle body, never can remember which is which.

Anyway, it's supposed to vent to atmosphere. As long as there's no fluid coming out, you're good.