This time when I noticed a Check Engine light as came to a red light. I thought, aha, this time, I shall look for a code. Thanks DS.
An anomaly, the car stalled out while driving slowly around 20-30 mph, after about 5 minutes. It has done this in the past. Had 2 1/2 gallons of gas left in the tank. Oil is full. Don't know why it does this, usually upon starting. Happens about once a month or two or three. Just stalls out. So while coasting, put in neutral, and restart the engine.
Checked the codes, pretty sure I saw 12 21 55. Not positive but pretty sure. Assuming the 12 and 55 are the Start and Stop code, 12 for a battery disconnect within last 60 starts, which seems unlikely, but okay, it's common for the codes to start with a 12.
So 21 is the:
21 Oxygen sensor signal doesn't change (stays at 4.3-4.5V). Probably bad oxygen sensorI am wondering. Maybe low gas in the tank, too little pressure on the fuel pump might give this reading? The pump has to work too hard without fuel kind of boosting it a bit?
A genuine bad sensor? Have had this car for only the last 30,000 miles and don't recall any repairs for sensors in the repair records though. Have to look again.
I have the genuine, official Chrysler shop manual for this vehicle and a digital voltmeter, so could do a little poking around first. I heard the sensor is not too difficult to replace but to get the OEM part. Wonder what the price difference is. I replaced the thermostat with an OEM part which looked better made than the Slant and less likely to jam so worth three times the price, for less aggravation.
Any ideas here? THe car had a tuneup, new plugs and wires and that valve, PCV? Maybe something else? Would the dealer have a scanner giving more codes and info? Have to see how if the Check Engine is going to come on all the time or not.
Maybe throttle body cleaning, is that something I can inspect or is this one that is done by assumption? DS suggested that before but I have not noticed much in the way of stalling out after I posted that problem last year. My car apparently reads this newsgroup and behaves better after I complain!