Quote:
Originally posted by Tirian
I have a 4 cyl Isuzu pickup. The O2 light was on so I replaced the O2 sensor, but the light is still on.
It was suggested that I disconnect the battery for a while to let the system reset, but since my terminals are stuck to the batt, I have not done that yet, because I will have to replace the battery clamps in order to do the job.
What else can be causing this light ????
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It's possible that somewhere in the circuit for your O2 sensor (or neighbouring circuits) that there's a faulty earth. You should check that all earths are clean & touching properly. If it's not an earth, then you could also have blown a fuse. Although this is unlikely to be the case, it's still worth checking your fuses.
If neither of the above helps, then the O2 light is telling you that your engine isn't in tune. I'm not sure whether the O2 light is saying there's too much air in the exhaust or too little, however. I'd assume it means you're running too rich. Does your exhaust smell like petrol & smoke a bit ?
Electrics are a bitch, I've fixed just about every problem in my own car except this one thing which I cannot solve. When they've been on for a significant amount of time, my headlights begin to flash on and off repeatedly, seemingly at random. I suspect it's a resistor or some other small component in the circuit for the lights, simply overheating & not working, until it cools enough and works again momentarily.