another CEL question

[SEEEEYA]

been talking how good my car is running these last 2 days with my new O2 sensor on, wellllllllll, the code came back today, car still running good, but it coded, why? have new hi-flos and cat back this year so I don't think anything is "plugged" could it mean I need a tune for the the upgrades I did this year? or ??

 

[VIPER GTSR 91]

Another CEL issue is very common it seems on here especially for the Gen 4, and this is the reason I am steering well clear of hi flo cats. I expect that to be the problem but it could be another. Seems like most owners who do the cats etc. also go with the Mopar PCM to prevent the CEL issue.

 

[PeterMJ]

been talking how good my car is running these last 2 days with my new O2 sensor on, wellllllllll, the code came back today, car still running good, but it coded, why? have new hi-flos and cat back this year so I don't think anything is "plugged" could it mean I need a tune for the the upgrades I did this year? or ??

what code are you getting?

 

[SEEEEYA]

The same code as before P0152, upstream passenger O2 sensor which is the one I replaced, connection looked good so might it be the PCM going bad?

 

[PeterMJ]

Could be many things actually. Probably a good idea to check the reference voltage and continuity in wiring. I think the reference voltage on the sensor should be about half volt.

 

[Westxsrt10]

The same code as before P0152, upstream passenger O2 sensor which is the one I replaced, connection looked good so might it be the PCM going bad?

I had the same code with HF cats...I replaced the downstream o2 sensor and it cleared the upstream code.
You can try not lugging the engine to clear the codes (don't go under 1500 rpm)
_____________________________________
08 coupe w/ Belangers

 

[PirateViper]

I put random techs on my car before I realized I didn't need to for cabin cooling and sound.I started throwing CEL but after a few cycles it went away.

 

[SEEEEYA]

I had the same code with HF cats...I replaced the downstream o2 sensor and it cleared the upstream code.
You can try not lugging the engine to clear the codes (don't go under 1500 rpm)
_____________________________________
08 coupe w/ Belangers

now that I think of it I was going down a side street and the motor was under 1500 so maybe that's it, but downstream might be a good try too

 

[SEEEEYA]

Well now the code is P0155 which is a temp fault in bank 2 sensor 1, its a new sensor, will this fault cause problems too? car runs good but is this going to be follow the bouncing codes every time the car starts??

 

[PirateViper]

Crap....it came back this morning.....o2 sensors coming!