Couple codes, and advice?

[BeeGeeSHO]

The SHO's been running a bit rough upon initial startup, but seems to straigten out after 2-3 minutes or so. Here's what my engine light came up with. Do I have muliple bad Oxygen senors? Or is something else just throwing them off?

P0300 = Random/Multiple Cylinder Misfire Detected
P0171 = Bank 1 system too rich
P0174 = Bank 2 system too rich
P0133 = HO2S Slow Response Bank 1 Sensor 1
P0153 = HO2S Slow Response Bank 2 Sensor 1
P01151 = Lack of HO2S21 Switches - Sensor Indicates Lean

Thanks for anybody'd expertise on the subject...

 

[BodylessSHO]

I'd say you have some cracked coils.

 

[BeeGeeSHO]

anybody else have a similar series of codes?

 

[SHOZ123]

I agree about the coils.

Look in the other current thread about coils for the best deal.

 

[projectSHO89]

The coils would account for the P0300.

I'd suspect you have either a vacuum leak or a dirty MAF sensor combined (possibly) with old/lazy upstream O2 sensors.

Eliminate any vacuum leaks first, clean the MAF sensor filaments, reset the PCM , and retest.

Steve