2002 Isuzu Trooper "bad o2 sensor cause po171" Questions

bad O2 sensors. Do you also have a rough idle? ewashmidas is exactly right. I have replaced the intake manifold gasket 4 times in a 1999 Trooper. Only last repair did I learn there is a TSB from Isuzu

...bad fuel pump could have leaned out truck causing o2 codes before pump quit hit the center of bottom of gas tank if it starts it definatelty needs a pump but have someone turn key while you are under ...

...bad O2 sensor operates within its "range" no O2 code will be generated.  For the intake leak, while the engine is running. take a spray water bottle and spray along the intake gasket.  Any ...

...O2 sencor had gone bad or the signal has and causing multiple mis fire. according to your codes. PO171 System too Lean (Bank 1 PO174 System too Lean (Bank 2) PO300 Random/Multiple Cylinder Misfire ...

o2 sensor is bad. check for vacuum leaks first. p0103 is -- mass air flow high curcuit input ( maf ). but before buying one because they are about 100 and some dollars. clean maf sensor first this may

...bad O2 sensors but have nothing to do with them. What are the codes? A Map sensor is a possibility but the coolant sensor also has a large influence on fuel control. If you have access to a scanner ...

bad.Replace it.This will cause a hard start when warm.The pressure sensor for the Evap.system is on top of the fuel tank.The po171 could be the fuel filter or o2 sensor.You need a scan tool to monitor

...and are available online free. The O2 sensor may be bad and is easily replaced. copy and paste https://www.yourmechanic.com/article/p0171-obd-ii-trouble-code-system-too-lean-bank-1-by-andrew-quinn

...bad O2s, but I recommend some diagnostic testing to prove it before spending the mega-bucks that Nissan gets for their O2 sensors. hi my name is nizam , i have 199 nissan maxima i just change 02 ...

...bad mass air flow sensor which could cause the computer to try and compensate air/fuel mixture. O2 sensors are rather pricey and should be checked by a scanner. They should have a minimum and maximum ...