ecotecturbo

Need some input from the lnf experts. It's a lean code but my car smells like its running rich. Car is a hhr ss auto with Hahn catless dp and a drop in kn filter. I cleaned the maf that didn't fix it.

C Vanciu

When my car was throwing a p2187 code it was running pig rich and ended up being a vacuum leak at the pcv line on the valve cover. Could possibly be a faulty evap purge solenoid.

714ionredline

iTrader: (1)

I got that code once, but it was because after a oil change I started the car up without the oil cap.

tomj77

iTrader: (2)

really? u got a code for that, I once forgot cap to and drove around for over an hour wandering why my car smelled like oil. no codes thrown

06RYSS

iTrader: (3)

i have the same code. its intermittent tho. i checked my evap purge solenoid today and it was good. i'm gonna try the vacuum tank bypass and see what happens then too.

ecotecturbo

Is there any possible way the downpipe could cause this code.

C Vanciu

If it's leaking at the o2 housing flange then yes. It would allow air to enter the system at the upstream o2, it would then see a false lean condition and try to correct it with more fuel, causing you to be running too rich. That's a simple explanation.