o2 sensor

Well, I've been trying to get my P5 back on the road. Started driving it again last week (first time it has been driven since April 2018). Put about 50 miles on it when the check engine light came on and started flashing. Misfire and dead downstream O2 sensor (had mechanic friend check it...

I am new to these forums and I am trying to figure out how to navigate them (on my phone...no pc), so forgive me if this has already been addressed. I feel somewhat confident in my abilities working on my cars as I do most routine basic maintanance. But money is tight, and I need to replace (I...

Hey everyone. so my 2003 P5 has a pretty bad misfire i know i was throwing the p0300 code along with many others. i finally got around to replacing the upstream O2 sensor but i feel like i took too long. the car was drive-able for a while but it sputters badly at idle it sputters really bad...

Well i am in the process of getting an actual value for my 1999 1.6 L Protege. I will have numbers soon. I am wondering if anyone can advise on a diagnosis path to make sure i am getting the most out of my fuel. Let me say i had a few codes present and my mechanic friend cleared codes and...

Hey guys, I've got a sick p5 and I can't quite find the cure for him and I'm hoping you guys might know something. First a little background and what's been tried and replaced. A couple of months ago after about a 1.5 hour drive. I pulled into the driveway with no troubles. I pulled out 15...

Hey Everyone, I am having a huge problem with my o2 circuitry. I get the P0134 no activity from the upstream o2 sensor; I changed the sensor with a new OEM denso unit and I am still not getting any o2 voltages on the when I data log from the obdII port. i read 0.00V on the front o2 and...

I bought my P5 new in 2001, and have kept it stock ever since. I have 128,000 miles on it. A couple of years ago, I started getting the random misfires. Replacing spark plugs and wires helped, but it was replacing the coils that finally fixed it just about a year ago, just in time for me to...

So i got the O2 sensor replaced and before it can pass emissions I was told I needed to reset the monitors by doing certain driving cycles. I had to call the manufacturer...who knew nothing about it and to call the local dealer's service dept. Who also knew nothing about it. i was told by a...