Help with some Error Code

[fcani]

My Volvo S80 T6 99, has presented this codes:

ECM 3502 (1,34,35,2)
ECM 3552 (1.,34,35,52)
The symptoms is:
-engine misfires
-poor performance
-uneven idle

If some one can help me too understand this i apreciated.*

*Sorry for my bad english.

Peace out!!!

[vegasjetskier]

Has the ETM been replaced?

[Crito]

ECM-3502 Misfire. Multiple cylinders
ECM-3552 Misfire, emission. Faulty signal. Permanent fault

I'd take out the plugs and clean or replace them to start. Clean the coil connections with CRC QD electrical contact cleaner. Clean the MAF with CRC MAF cleaner. Clean at least half of the throttle body with CRC throttle and intake cleaner/lubricant -- there's no cable to make butterfly valve open so you have to unbolt ETM from intake manifold to clean other side. And if all else fails take it to a dealer to have things randomly replaced (at your expense) until the problem goes away.

[fcani]

The spark plugs and ignition coils are ok.
About the ETM i dont clean, but i gonna make wen a have courage for this...hehe...
The MAF i change 1 year a go.
A ETM in Brazil dont have waranty, and for replace the cost is about U$ 4.000,00 on dealer.

So i will try repair the car myself.
Thanks for help.

[Crito]

I don't think cleaning the ETM will fix a "faulty signal", but good luck with that anyways. If you need to look-up Volvo ECM codes in the future just go here: http://www.ppc-diagnostic.com/codes/eECM/

[fcani]

I change the spark plugs and the car has power again, and the idle is finne.
the only mesengen now is: "drive slowly urgent review"

Wath i need do now???

[mvsuzr]

Check "Don's ETM Room" on this site, you may be having an ETM failure. Don't get the Volvo module, if you have to get a new one try the XEMODEX unit.

Did the ECM codes clear?