P0411 & Rough Idle

[dadenkern]

2001 non-sport, 166,000 miles

Symptoms
- P0411 code several times a week
- Rough idle when started cold
- No issues once the engine was warm

Solution
- Replaced MAF sensor

One trigger for the P0411 code is failure to detect a lean condition during a cold start as it should with the extra air introduced by the secondary air injection system. During a cold start the MAF sensor must have been mis-guiding the computer causing an unexpected fuel-air ratio as measured by the O2 sensors. Once the car warmed up and closed-loop control was established the car ran fine.

[hgqguy]

my catera did this rough idle the other day after it was warm! check engine and t/c light poped on and car had NO power to drive. so I shut off and restarted and it was fine.. think it could be same issue? I have yet to have the c/e light code pulled.
thanks.