P2187 and P2189 codes, Loren please help!

[jucarbon]

My Cayenne is giving this codes. I reset them and they come back after being idle for around 15 minutes (when my wife waits for my kid to come out of the school). The Cayenne drives fine with no problems or misfires. What can cause this? thanks

[jucarbon]

Sorry Loren, I changed your name.

[Loren]

P2187 Oxygen Sensing Adaptation, Idle Range, Bank 1 (RKAT1) - Above Limit

P2189 Oxygen Sensing Adaptation, Idle Range, Bank 2 (RKAT2) - Above Limit

Possible fault cause

- Incorrect main charge signal

- Intake air system leaking

- Fuel pressure too low

- Volume supply of fuel pump too low

- Mechanical fault in injection valves

- PCV valve leaks

- Cap of oil filler neck leaking

- Leaks in exhaust system

- EVAP canister purge valve mechanically faulty (hangs open)

- EVAP canister purge valve output stage faults

[hecfig99]

So most likely this has nothing to do with the O2 sensors?

[Loren]

So most likely this has nothing to do with the O2 sensors?

Correct.

The sensors are telling you that at idle there is likely a air leak that the DME can not correct for. So the car is getting to much air (in the air to fuel mix) - so much so that the DME can not correct for it. Hence the faults.

[hecfig99]

Im getting P2189..I first noticed something was wrong when my wife told me the cayenne sounded loud on the road while she was driving next to me. I got to my driveway and heard it. It was idleing up and down, sometimes holding steady over 2000 rpm. When the car has been sitting overnight, it takes about 10 minutes or so to start acting as such. I also notice that it heats up to about 3 quarters up on the temp gage. There is some noise coming from the engine, at first it sounded like something was scrapping but nothing is doing so, also sounds like a hissing/leaking sound but we have not fount any leaks. There is some grime around the oil refill cap, I took it off a couple of times and retightened it (it feels tight and sealed) but no improvement in car . Some months ago I had to replace the infamous cooling pipes after they burst, but I have driven over 5,000 miles since then. Any specific ideas what it might be?

[Loren]

Possible fault cause

- Incorrect main charge signal

- Intake air system leaking

- Fuel pressure too low

- Volume supply of fuel pump too low

- Mechanical fault in injection valves

- PCV valve leaks

- Cap of oil filler neck leaking

- Leaks in exhaust system

- EVAP canister purge valve mechanically faulty (hangs open)

- EVAP canister purge valve output stage faults