Extreme Fuel Trim Numbers on Launch X431 V+
- Kenyamyhome
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Suppose that 100% is normal and above adds fuel below subtracts.
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- Kenyamyhome
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- Kenyamyhome
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- Andy.MacFadyen
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We had a Nissan Cube doing that a while ago - turned out to be a sticking oxygen sensor.Kenyamyhome wrote: Hey Tyler, its true its a Nissan Sylphy, 2006. So am happy and at the same time surprised that the 100% trim figure means zero correction. Actually i do have a " P0868 fluid pressure low" that gets the vehicle struggling on slopes. If i drive for a few minutes, say 10 minutes, and i happen to stop on a slope for a minute, i wont be able to snap throttle or get the vehicle to move as it will stall for a few moments before it moves. That's even with pedal to the metal. As that happens, (pedal to the metal) speedometer stays still, engine stays quite until few moments later when it finally moves. I still don't know where to start from.
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- Kenyamyhome
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Just for clarification, i do have a P0141 HO2S2 HTR(B1) on my scanner.
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- Kenyamyhome
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An oxygen sensor can get covered in dirt and give the wrong reading for a while, or fail electrically and stop switching lean-rich-lean-richKenyamyhome wrote: Thanks Paul6004. Excuse my lack of understanding. What did you mean when you said a sticking O2 sensor? ...So how did you go about sorting it. I will highly appreciate your response on this.
Just for clarification, i do have a P0141 HO2S2 HTR(B1) on my scanner.
and just stay on one of them making the ECU think there is an issue with fuel mixture.
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- Andy.MacFadyen
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On engines built since the mid-1990s when OBD2 was introduced there are heaters on the O2 sensor to speed the warming up process.
A P0141 code on a Nissan points to failure of the heater circuit on the rear oxygen sensor heater --- this can be either a failed O2 sensor or a short or open wiring to the sensor heater.
" We're trying to plug a hole in the universe, what are you doing ?. "
(Walter Bishop Fringe TV show)
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