New TN User
Join Date: Jul 2006
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Thanks for the feedback. Yes, my next thought was to swap inj 3 and 1 and see if the code follows the inj or the cylinder. I haven't tested the inj resistance, either, which I should be able to do w/o removing it, but that just indicates that the solenoid is potentially OK. I just ran some FI cleaner with the last fuel up and it didn't change anything; which I was not expecting it to do so, so I thought about the concentrated cleaner route IF it really is isolated to the injector.
I was looking at the live data this morning and noticed that there is nothing associated w/ short/long term trims for banks 3/4. So, I guess I am to assume that there are only the 2 banks and the freeze frame data for 3/4 are only placeholders? That now makes sense. However, the live data still shows SHRTFTB2S2 at ~99%. I know enough about the OBD2 system to be dangerous, but I believe this data point is associated w/ O2 sensor #2?
Also, I noticed something really odd over the weekend. I live in central PA; the weather was decent over the weekend, so I washed the truck to get the road salt off of it. It had been awhile since I last washed it, so I sprayed up underneath the wheel wells and along the frame to try to get as much of the crap off of it. I also opened the hood and rinsed the engine compartment down (which I have done on occasion since I've owned the truck). The handheld scanner I have has green, yellow, and red LEDs on it that indicates the overall system function/status. Since I started to monitor this gremlin, the yellow LED has always lit; indicating that there is a problem w/ the system but not enough to cause a code/fault and switch the red LED on. However, when I connected the scanner and drove to work the next day after washing it, the green LED was on. After work, when I started the vehicle, the yellow LED was back. The yellow LED stayed lit while I drove to work the next day but it had started to rain. It was still raining when I left work, but the LED was now green. The next day, the roads were dry and the LED was back to yellow.
So, now I'm wondering, did the humid, moist air affect the trim sensor, or do I have an incomplete connection someplace and the water/moisture helps to maintain contact until it dries out? This is really maddening. Any idea where those trim sensors are located?
BTW, the check engine MIL does not flash and the code has always been P0303....I initially thought it was 0203 but that was wrong.