my ULEV engine requires 5-30 and 10-30 got put in at last oil change and P1167 code appeared right after driving it. It had both the P1166 and P1167 codes together and I replaced #1 02 sensor, cleared codes and only P1167 came on after a few minutes of idling. Car runs perfect other than a slightly noticable lower idle speed - maybe 200rpm lower than normal. My thought was maybe the thicker oil produced a pcv atmosphere with a higher concentration of oil coating/dirting up the sensor wire. What ya think
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2000 Honda Accord
Question: could the sensor wire in the Mass Air Flow meter get dirty from wrong engine oil
Answer #1patrick mannion from Greg Solow's Engine Room, January 14, 2012, 18:20Master
Both engine options use a manifold pressure sensor mounted on the intake manifold not a mass airflow sensor/MAF sensor. Oil grade will not affect it. The P1167 code is O2 sensor related. Have you replaced the correct O2 sensor. One important thing on Hondas is often over looked the valves are "screw " adjustable and are often over looked as part of a tune up.
ReplyLive2Solve, January 14, 2012, 19:35Rookie
Thank you for your input I now know more about my engines system. I do have the second ( #2 ) o2 sensor and will install it in the cat,and also will check the adjustment on the valves which I just assumed were hyd. auto adj. valves. I also pulled the air intake and discovered a good coating of black gooey film on the backside and throat of the throttle body. I will use crc cleaner and a toothbrush and gingerly clean this area. Again thank you for your advice.