O2 sensor madness!!!!
#1
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OK, I was coming home from work one day and stopped by the post office to gather my mail. I left her running, and as I came out, I saw she was shuddering. "Oh no", I thought, and jumped in. She was running at around 1500 RPM's, and shaking like a leaf. Then she revved up to around 3000 RPM's, held it for a second, set a trouble light, and settled down somewhat. I drove her home, grabbed my scanner, and it said the o2 sensor voltage was too high. I checked and the rear sensor wire was broken. I bought a new sensor, installed it, and then it complained about 02 sensor malfunction and a bad cat. I grabbed a used sensor I had lying around, installed it, no trouble light. So, I bought a high flow cat and a sensor simulator, as well as a new front sensor. Now still no trouble light, but the scanner says my "HO2" sensor is not emmisions ready.... I have to get inspected this month. Help??
#5
#6
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In North Carolina, they plug you into a computer and wire your stats to Raleigh's computers. I don't know if they'll pass it anyway, though. Another thing is I want it running efficiently; that's a main reason I'm concerned. BTW, which one is the "HO2" sensor, front or rear? The one my scanner refers to as the O2 sensor is proclaimed ready.
#7
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Thanks, but it's not throwing a code, the CEL is unlit, and the truck is actually running rather well, which is the puzzling thing. I just checked the emissions readiness test on my scanner and it simply says "HO2 Sensor: NOT READY." The sim is through Fastman, and I've heard good things about him.
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#8
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Thanks, but it's not throwing a code, the CEL is unlit, and the truck is actually running rather well, which is the puzzling thing. I just checked the emissions readiness test on my scanner and it simply says "HO2 Sensor: NOT READY." The sim is through Fastman, and I've heard good things about him.
#9
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That'd be my guess as well, Helms. The H02 (Heated O2) sensor needs to warm up to a couple hundred degrees before it sends info to the PCM. Thats one of the reasons why they have open loop mode and closed loop mode.
Next time you drive it for a couple miles, to a grocery store or wherever, park it when you get gome (but don't shut it off) and plug the scanner in again, see what it says.
Next time you drive it for a couple miles, to a grocery store or wherever, park it when you get gome (but don't shut it off) and plug the scanner in again, see what it says.
#10
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That'd be my guess as well, Helms. The H02 (Heated O2) sensor needs to warm up to a couple hundred degrees before it sends info to the PCM. Thats one of the reasons why they have open loop mode and closed loop mode.
Next time you drive it for a couple miles, to a grocery store or wherever, park it when you get gome (but don't shut it off) and plug the scanner in again, see what it says.
Next time you drive it for a couple miles, to a grocery store or wherever, park it when you get gome (but don't shut it off) and plug the scanner in again, see what it says.