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"No input to bank 1 O2 sensor"?

SDGTP99

SDGTP99

New member
My engine light is on & I've had the car scanned by a few different ppl & each time it's scanned this comes up; "Code 1133, No input to bank one O2 sensor" I've replaced both O2 sensors & checked the wiring for any damage. Unless its by some chance a malfunctioning O2 sensor I'm at a complete loss whats causing this. I need to get this fixed it causes my car to run lean & sluggish. Has anyone delt with this problem & know what I should do? :(
 


It is the only code I am throwing. I checked under the exhaust & the y-pipe isn't welded all the way around. It leaked a bit on the topside so I just wrapped heat tap around it as a temporary stop gap. No leak for now.

I don't have an EGR & nvr threw a code for it. Probably something to do with the ZZP PCM.
 
SDGTP99 said:
It is the only code I am throwing. I checked under the exhaust & the y-pipe isn't welded all the way around. It leaked a bit on the topside so I just wrapped heat tap around it as a temporary stop gap. No leak for now.

I don't have an EGR & nvr threw a code for it. Probably something to do with the ZZP PCM.
Click to expand...

Trace your wires on the o2 sensor again (no breaks or burns), and maybe put some dielectric grease (to ensure good connection on the plug).

I went through like 3-4 o2 sensors troubleshooting that on mine.
 


I'll trace the wires again. Have thought about replacing the extension wire & the O2 sensor to see if that fixes the problem. Hadnt thought about using dielectric grease I'll try that too.
 
what brand O2 sensor? I made the mistake of using a bosch the first time around and wound up with the same code and warrantied the sensor twice before i tried an ac delco from rock auto. havent seen the code since
 
^^^Both O2 sensors on my car are Bosch. I had my exhaust leaks welded shut & the code is still on. I ordered a Denso front sensor today to replace the front Bosch sensor. This had btr fix my problem.If it does not I may be forced to buy a new PCM.
 
Code always comes back within a day or two after being deleted. If the code is still there after i install the denso sensor im going to asume it is my zzp pcm. Maybe i didnt get my egr code deleted or something...
 


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