Hi Guys,

Just took my car the other day for a drive and had the engine light on. I went to check it on scanner ( not STAR ) and gave me these codes:

P204E Misfiring on cylinder 8 (P0308) ( see currently valid STIP )

P2043 Misfiring (P0300) (see currently valid STIP)

P204A Misfiring of cylinder 7 (P0307) (see currently valid STIP)

P204B Misfiring of cylinder 11 (P0311)
(see currently valid STIP)

P204F Misfiring of cylinder 10 (P0310) (see currently valid STIP)

P2047 Misfiring of cylinder 6 (P0306) (see currently valid STIP)

P2082 G3 / 10 ( right O2 sensor, upstream TWC, for cylinder 4 - 6) : Aging, voltage rise too low (P0130)

P2050 Misfiring, Damages TWC (P0300)

P2052 Misfiring of cylinder 5, Damages TWC (P0305)

P2054 Misfiring of cylinder 6, Damages TWC (P0306)

Occasionally in the past engine light would come on if I drove it without warming it up, but it would turn off by itself the next day or two with the condition that I warmed it up before driving it.

This time I felt that I pushed the pedal too deep on lower gear, and on the way back the engine light came on.

I had the scanner cleared the codes, then drove it about 20 miles, but then the engine light came back on. I didn't feel the engine shook like when I had the engine light before, it ride smooth, no overheating, but yet scanner said cylinders misfired.

So I asked around, one said to first change the O2 sensor, upstream. Is it wise to change all of the 02 sensors, both banks, upstream and downstream ( 4 O2-sensors total for V12 engine, right ?? ) Do the other O2 sensors usually go out at the same time?

I replaced the spark plugs at 90k, is it time to change the spark plugs too? Car has 122K

Anything said about my cats being damaged already ?

Did it say anything about bad coil packs?

Bad ECU ? Though the misfire seemed random, hence this might not be the case

Will STAR scanner diagnose/answer better?



Thank you so much for the advice!