5th & 6th Generation (2002-2006 & 2007-2011)Toyota Camry Discussion for years: 2002-2006 & 2007-2011
Topics of discussion range from fuel economy, safety, modifications, performance all involving America's favorite family car, the Toyota Camry.
I have 2001 Nissan Pathfinder with 54k miles...normal this car used gas (89) but put a wrong gas for 87..now i got Engine services light come up...went by Auto zone and the code is P0158..
i remove the negative battery cable out to reset the light but the light still on.. P0158 is oxygen sensor ('bank 2 sense 2)....can you tell where it's locate?
is there a way to reset engine light without using scan (ODBB) to reset?
Does anyone has manual for 2001 Nissan Pathfinder model?
First, I think you are posting in the wrong section and maybe even the wrong forum. "Gen 5 & 6 Camry"
But to reset the light, the guys at AUTOZONE can reset the light when they scan for the code, just ask them to.
Also if the vehicle requires 89 gas and you use 87 gas it maybe knocking (pinging) and giving you that code. Sometimes it's very hard to notice engine knock but the onboard computer usually picks it up.
Or a faulty O2 sensor, hey it happens.
my mistake, i thought that the O2 sensor checked your exhaust air/fuel ratio to see if you're running rich (more fuel vapor, less oxygen) or lean (excess oxygen). But I think it does both fuel management and emissions.
my mistake, i thought that the O2 sensor checked your exhaust air/fuel ratio to see if you're running rich (more fuel vapor, less oxygen) or lean (excess oxygen). But I think it does both fuel management and emissions.
No, it doesn't do both.
Sensor 2 is for emissions only. Period. That's the facts.
Apparently there is a TSB for replacement of the rear O2 sensors and a reflash of the PCM/ECU for this condition.
A quick Google search of "2001 Pathfinder P0158" has netted these results:
http://en.wikipedia.org/wiki/Oxygen_sensor Automotive oxygen sensors, colloquially known as an O2 sensors or lambda sensors make modern electronic fuel injection and emission control possible. They determine if the air/fuel ratio exiting a gas-combustion engine is rich(unburnt fuel vapor) or lean(excess oxygen). Closed loop feedback controlled fuel injection means that the fuel injector output is varied according to real-time sensor data rather than operating with a predetermined fuel map (open loop). In addition to improving overall engine operation, they reduce the amounts of both unburnt fuel and oxides of nitrogen from entering the atmosphere. Unburnt fuel is pollution in the form of air born hydrocarbons, while oxides of nitrogen(NOX gases) are a result of excess air in the fuel mixture resulting in smog and acid rain producing compounds. This information is sent to the engine management ECU computer, which adjusts the mixture to give the engine the best possible fuel economy and lowest possible exhaust emissions. Failure of these sensors, either through normal aging, the use of leaded fuels, or due to fuel contamination with eg. silicones or silicates, can lead to damage of an automobile's catalytic converter and expensive repairs. Tampering with or modifying the signal that the oxygen sensor sends to the engine computer can be detrimental. When the engine is under low-load conditions (such as when accelerating very gently, or maintaining a constant speed), the engine is operating under 'closed-loop mode'. This refers to a feedback loop between the fuel injectors, and the oxygen sensor, to maintain stoichiometric ratio. If modifications cause the mixture to run lean, there will be a slight increase in fuel economy, but with massive nitrogen oxide emissions, and the risk of damaging the engine due to detonation and excessively high exhaust gas temperatures. If modifications cause the mixture to run rich, then there will be a slight increase in power, again at the risk of overheating and igniting the catalytic converter, while decreasing fuel economy and increasing hydrocarbon emissions. When an internal combustion engine is under high load (such as when using wide-open throttle) the oxygen sensor no longer operates (it works, but the signal isn't used to make adjustments in relation to fuel trim/control), and the engine automatically enriches the mixture to protect the engine. Any changes in the sensor output will be ignored in this state, while changes from the air flow meter can lower engine performance due to the mixture being too rich or too lean, and increase the risk of engine damage due to detonation if the mixture is too lean.
http://en.wikipedia.org/wiki/Oxygen_sensor Automotive oxygen sensors, colloquially known as an O2 sensors or lambda sensors make modern electronic fuel injection and emission control possible. They determine if the air/fuel ratio exiting a gas-combustion engine is rich(unburnt fuel vapor) or lean(excess oxygen). Closed loop feedback controlled fuel injection means that the fuel injector output is varied according to real-time sensor data rather than operating with a predetermined fuel map (open loop). In addition to improving overall engine operation, they reduce the amounts of both unburnt fuel and oxides of nitrogen from entering the atmosphere. Unburnt fuel is pollution in the form of air born hydrocarbons, while oxides of nitrogen(NOX gases) are a result of excess air in the fuel mixture resulting in smog and acid rain producing compounds. This information is sent to the engine management ECU computer, which adjusts the mixture to give the engine the best possible fuel economy and lowest possible exhaust emissions. Failure of these sensors, either through normal aging, the use of leaded fuels, or due to fuel contamination with eg. silicones or silicates, can lead to damage of an automobile's catalytic converter and expensive repairs. Tampering with or modifying the signal that the oxygen sensor sends to the engine computer can be detrimental. When the engine is under low-load conditions (such as when accelerating very gently, or maintaining a constant speed), the engine is operating under 'closed-loop mode'. This refers to a feedback loop between the fuel injectors, and the oxygen sensor, to maintain stoichiometric ratio. If modifications cause the mixture to run lean, there will be a slight increase in fuel economy, but with massive nitrogen oxide emissions, and the risk of damaging the engine due to detonation and excessively high exhaust gas temperatures. If modifications cause the mixture to run rich, then there will be a slight increase in power, again at the risk of overheating and igniting the catalytic converter, while decreasing fuel economy and increasing hydrocarbon emissions. When an internal combustion engine is under high load (such as when using wide-open throttle) the oxygen sensor no longer operates (it works, but the signal isn't used to make adjustments in relation to fuel trim/control), and the engine automatically enriches the mixture to protect the engine. Any changes in the sensor output will be ignored in this state, while changes from the air flow meter can lower engine performance due to the mixture being too rich or too lean, and increase the risk of engine damage due to detonation if the mixture is too lean.
That's a great description of SENSOR 1 however the problem is with SENSOR 2.
Sensor 2 has not input on vehicle performance. It's only there to monitor the convertor(s) as part of OBD II. They are also referred to as catalyst monitors for that reason.
You really don't need to post anymore, you don't know what you're talking about or apparently what you're searching for...
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No, it doesn't do both.
http://en.wikipedia.org/wiki/Oxygen_sensor
Sensor 1 / sensor 2 minor details but anyhow have a happy thanksgiving Vtec. I'm leaving work now, time to eat some turkey.
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