slaminal

To jump on this thread, I've also got a 2006 wagon (MT) that just gave me a nice P0171 as I was idling in a parking lot today. Any chance that an exhaust install would cause the code to pop up? Swapped out the old, rusty exhaust with aftermarket fart cans for a generally non-rusty stock catback from a 2008 sedan just the day before, though I didn't get the CEL until now. No noticeable difference in driving or idling otherwise, though it's not the smoothest ever (it never really was).

 

Percussive maintenance occurred, so it's possible something just gave way, but I can't shake the feeling that somehow this return to stockness has awoken something in my car...

Honestly, I have experienced a break in the hoses near the charcoal canister in the rear wheel wells that have tripped that code. That might be worth checking out.