N NM4Runner New member Aug 30, 2010 #1 Checked at Autozone and results: Air/Fuel mixture system lean bank 1 Probable Causes: - low fuel pressure - faulty MAF/VAF sensor - cylinder misfire - faulty o2 sensor - vacuum leak I have changed the forward o2 sensor... '99 Limited 131,000 miles
Checked at Autozone and results: Air/Fuel mixture system lean bank 1 Probable Causes: - low fuel pressure - faulty MAF/VAF sensor - cylinder misfire - faulty o2 sensor - vacuum leak I have changed the forward o2 sensor... '99 Limited 131,000 miles
piperoo New member Aug 30, 2010 #2 Probably need to clean the MAF Sensor. Search for threads on how to do it. Not sure if you have to clear your codes once you put in the new O2 sensor...that might be it but someone else here will know.
Probably need to clean the MAF Sensor. Search for threads on how to do it. Not sure if you have to clear your codes once you put in the new O2 sensor...that might be it but someone else here will know.
