I shudder to think about how this job could have gone if I had no access to any further information than what was in the Factory trouble code chart. For example, the engine will bog down or hesitate while accelerating or it will stall or surge at lower engine rpms. When the air-fuel ratio becomes lean, the oxygen concentration in the exhaust gas becomes rich. With the car running I start wiggling and tugging on the sensor wires. If so, the sensor is faulty and will need to be replaced. Toyota Technical Service bulletin 0074-08 addresses these codes. First, I want to say this is a very common fault code on this engine.
If not, go tho a dealer and tell them that you want Oxygen Senso Bank 2, Sensor 2, and have them tel you where it is. However, this is not always the case. Another thing you will want to check is the air filter itself. Toyota Premio Engine Specifications: Engine Type : Single Cylinder Engine Cylinder Type : Opposite Piston Engine Engine Air Intake Process : Supercharged Engine Your Toyota Premio engine control system detects a problem, the computer stores the diagnostic trouble code P0158 in its memory. How does a mechanic diagnose the P0157 code? In that case, I would recommend to use a voltmeter while backprobing the signal wire at the sensor while the engine is running so you can get a live reading. Unfortunately I have not first observed behaviour of the original sensor before replacing it, but at this point I have no reason to believe the original sensor was bad at all. A discrepancy in voltage levels between the main cpu and the sub cpu.
If not addressed, damage to the catalytic converter can be done over time, which will be expensive to fix. If the fuel trims go up or start to climb positive, this indicates a leaking brake booster. The P0158 trouble code is considered serious if it is causing the car to stall out. By being patient during the removal and tapping of new threads, the technician has saved the owner the hassle and cost of replacing the entire damaged manifold in this case at no additional charge to the owner. The heating element should have battery voltage on one wire with key on engine off and ground should be present on the other. Also check that the heater element is being supplied good battery voltage. Long term trim on bank 2 is different than B1.
The technician turns the tap in the manifold 360 degrees and then removes and cleans the tap of metal debris and applies more penetrating oil. If you would like some help diagnosing this condition or need assistance with your vehicle, you can 2. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Check for voltage on the wires coming from the Engine Control Module. If the brake booster goes bad and leaks engine vacuum, it will affect the fuel trims and the computer will flag this P0171 lean code. Proper fuel pressure should be at 40 psi. With Stability Control the O.
The new updated part numbers for the air fuel ratio for bank 1 is and for bank 2 is. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. It informed me of other possibilities I was unaware of and it gave me something to test so I could prove out the problem for myself. Good fuel trim numbers are 0% or as close to 0% as possible. You can get a cheaper one that you splice but it's confusing to understand which wires to splice together. Here's your Oxygen sensor codes.
If the oxygen in the exhaust gas increases, the air-fuel ratio becomes Lean. Two wires are dedicated to the heating element and two wires are dedicated to the sensor. Conversely, when the air-fuel ratio is richer than the stoichiometric air-fuel level, the oxygen concentration in the exhaust gas becomes lean. YourMechanic offers certified mechanics who will come to your home or office to diagnose and repair your vehicle. However, it is important to note, that this sensor should only be changed after replacing the mass air flow sensor or ruling it out as a possible cause and fixing any air or vacuum leaks under the hood first. Here the tap has been threaded partially into the manifold.
It is actually detailed in the owner's manual but you really have to hunt for it. The conclusion is that I was able to fix a potential nightmare problem in a very short time and I learned some valuable information that may help me another day when there is no other help to be found. So, if that is the case, it could explain bank 2 being commanded more fuel to compensate for 'lean' reading. If the sensor is not functioning properly, the voltage output variation is small. In addition the changes of the amount of air coming into the engine or driving conditions change very fast as the driver accelerates and lets off of the gas pedal so the response time must be quick , fast and accurate. A P0171 Diagnostic trouble code indicates a lean condition on bank one. The calculated load reading should increase to 85% or higher on a wide open throttle acceleration.
Unfortunately, I ruled that one out and never looked into it in more detail. I know it is tempting to get the universal-fit type and save the cash. However, keep in mind, the theory and operation is still the same when it comes to a lean condition on the V8 engine and all other internal combustion engines with this similar Toyota fuel system. When the target air-fuel ratio is lean and the voltage output is 0. The last vehicle on this page is the Highlander. I set my scanner to graph the rear O2's.
If you have one injector that you suspect is bad or plugged up causing the engine to misfiring, you can swap that fuel injector with another fuel injector from a different cylinder to see if the misfire code or misfire condition moves along with the fuel injector. Another thing to check - the car's computer may have posted an error code from the fuel tank pressure sensor. The shear characteristics of the clutch fluid gradually deteriorates over time, with an average loss in drive efficiency of about 200 rpm per year. They asked me to flash the tcm per toyota bulletin for a shifting issue. This is not the same as testing it with an oscilloscope which I don't have so I can't be sure it's good.