I need some help. I have a check engine light problem. The code calls for
02 sensor replacement. Trouble is, it calls for 2 of them. They are very
expensive, and I have been told ther is a 'FIX' that you can buy and put in
the circuit that fools the computer into thinking the 02's are ok. Has
anyone ever heard of such a 'FIX' or is this just wishful thinking? I
forgot to say this is a 1997 Chevy PU 5.7. Hope someone can help.
P. M. Rickard
Central City, Ky 42330
1. There is no DTC that calls for O2 sensor replacement, doesn't exist,
never did. You may have a DTC that detects a problem within the system but
that's all. Did you have codes pulled by someone with experience or
someone with a tool to do it? There is a difference.
2. No, there is no way to bypass the O2 sensors. Ask the person who gave you that info to please provide a manufacturers name or a link to me. I'd love to see it.
3. Bad news. Your truck doesn't have two O2 sensors it has four. Double you pleasure, double your fun.
Please don't think I'm being an ass but whoever is giving you this info appears to be clueless. My guess is you went to Autozone and had a minimum wage flunky plug in for free. Remember they're in the bussiness of selling parts not repairing cars (or trucks). If you supply me with the codes I can and will be of more service.
Code was 141 and repair book says it is 02 sensors. Yes I do know there are more than 2 in the system. firstname.lastname@example.org
Ah grasshopper, code P0141 HO2S heater circuit, bank 1 sensor 2. That is
the left downflow sensor. Notice the description refers to the heater
circuit, not the sensor itself although it could be a bad sensor. Get
underneath and check to see if the sensor connector is clean and in good
shape. Also check the harness to see if it has chafed or burned
If you don't find anything upon inspection clear the code and see if it comes back. If it does come back you obviously have more investigating to do. OBD II vehicles can sometimes be hyper sensitive to sensor input. I've seen this code set on Chevy trucks just because water had gotten trapped inside the connector.
Oops! I said downflow went I meant downstream. Hope this didn't cause any confusion.
have never got burnt on heater fault code buy replacing o2 sensors,replace
the sensors and be done with it! could have another issue but not common
you can put a resister in place of the o2 sensor to trick the computer to think its rich or lean to change the fuel ratio, big 5.0l mustang trick (dumps more gas)
but will probly throw check engine light on?(goes faster who cares if lights on)
and would have nothing to do with a heater fault!