Quote:
Originally Posted by cca6164
Thank you both for your help. Update after cleaning the MAF, air filter and replacing all four o2 sensors. Was code free for 90 miles until it threw an old code and a new one.
P1092:Pre catalyst fuel trim system too lean bank 2
P1093:Pre catalyst fuel trim system too rich bank 2
Not sure if its purely mental, but car seems to be running happier. Those o2 sensors looked really beat up, wouldn't be surprised if they were original. I am thinking of tackling the fuel filter next. Or should these new codes be pointing me in a different direction? Thanks!
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Hmmm, the two codes P1092 and P1093 contradict each other. Can't have both; either LEAN or RICH. Could be bad connections to the MAF or O2 sensor for Bank 2.
One thing you can check is the connector for the MAF. Mine if not seated properly gets too rich. If I kind of push the connector on the MAF, the reading corrects itself but after a while it somehow loses contact with pins and could see abnormal readings.
Do you have access to see real time data? More specifically the fuel trims; Short Term (STFT) and Long Term (LTFT). Try investing on a WiFi bluetooth OBD and then download OBD Fusion or Torque Pro.
Here is the WiFi OBD i use:
https://www.amazon.com/Veepeak-Scann.../dp/B00WPW6BAE
OBD Fusion or Torque Pro can be downloaded from AppStore. I personally use OBD Fusion but it is your choice. I think I paid $10 for the OBD Fusion.
Looking at the fuel trims will give you a big picture on what's the engine is doing. There are few more PIDs you can see like batt voltage, coolant temp, speed, rpm, cat converter efficientcy etc. so it has more use.