help with O2 sensor or something else?
Thread Starter
Teching In
Joined: Jun 2005
Posts: 32
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From: Land O Lakes/Tampa, Florida
help with O2 sensor or something else? Hello all, recently I did the dumb thing and had to put some cheap gas in my car. I only put in six gallons. On my way home the car starting acting wierd like rough idle at a stop light, but if I was cruising at say 55 no problems at all. Well Since I thought it was the gas I put a good octane booster in the tank and then filled the car with 93 Shell gas. I get the rough idle not so much any more, but now my car is throwing the p0131 and p0171 codes(ses light). I use a predator handheld tuner to tune my vehicle and to check my codes and data. I have longtube headers with the bosch rear vette sensors and no cats or second set of sensors. My programmer tells me that the voltage for Sensor #1 Bank #1 is too low, and also fuel trim too lean Sensor #1 Bank #1. Those are the only codes it throws. I drive 20 mins to work, for the first 10-12 mins. both sensors are reading fine they are switching like normal, and everything is fine, shortly after that I see the the one sides percentages shoot way up to 56.25% for short term sensor #1 and the long term go to 25%. I see no exhaust leaks and these sensors are about a year old. I am about to go and pull the O2 sensor and check for any issues. Is there something I can use that will clean the sensor without harming it? Thanks and sorry for the long read.
Sounds like the sensor(s) may have taken the dump. Maybe the gas had some water in it? I've heard if you pull the sensors and use a propane torch on them it can clean them. I never had much luck doing it though.
go ahead and change the driver front O2 sensor make sure you clean the contacts first when you retest it. i would hate for you to have gotten them dirty at some point and now your contact, or lack of, is messin everything up
