Hello geniuses, chasing this P0056 and P0141 codes. After reading several posts online it turns out that it like NGK (or NTK) brands best.. I found a listing O2 Sensors and their Part #s, if its correct Mine is 23133. I bought 2, They arrived, I Installed them, cleared the codes, cranked the car, the codes were still there. At this point I'm suspecting the Heater circuit is bad, Bad Wiring or PCM not doing its job since I have changed the O2 Sensors with brand new ones. I have spent the last 2 Weeks studying everything I can find on these Chrysler O2 Sensors, ScannerDanner Have some serious videos on YouTube about Chrysler O2 Sensors. I just can't understand the language that He's speaking, Lol. But, according to him, there should be a 5V reference at IGN On, Eng off, Used to test the Heater Circuit (And as I Originally thought it should be 12V? Correct Me please)
Anyhow, I've been going through the FSM to see what I can find about the Wiring of the O2 Sensor, I've attempted checking the Voltage at the O2 Sensor Connector Harness at IGN On to see if I can find any 5V or 12V (Tracing the 2 White Heating Wires down to the O2 Sensor Harness) I got 0V (But I'm not sure the wires that I traced were the correct Wires/Pins, Correct Me Please??) and couldn't get their colors either because the Downstream O2 Connectors are tucked so far down its exhaustingly impossible trying to reach them. Now, I figured since most of these wires terminate at the PCM behind the Headlight or PDB, there Must be a way to check it there, Correct? Problem is, I don't know what color or wire or Pin # it would be, So that's why I'm here.
First question I guess, is am I on the right track as to My efforts so far? As I have changed the O2 Sensors and still getting the same Codes, Is/are there any other easier/better diagnostic procedure approach that I can use to root out this sore thumb?
2. Where/how can I do a simple test with A Multimeter to see if the heater circuit is Compromised?
Truth is, I would ignore this stupid issue, but, I have ignored it for over a Year now, and I'm getting 15-17mpg. Car is a 2002 Chrysler 300M Special.
Thanks Guys.
Anyhow, I've been going through the FSM to see what I can find about the Wiring of the O2 Sensor, I've attempted checking the Voltage at the O2 Sensor Connector Harness at IGN On to see if I can find any 5V or 12V (Tracing the 2 White Heating Wires down to the O2 Sensor Harness) I got 0V (But I'm not sure the wires that I traced were the correct Wires/Pins, Correct Me Please??) and couldn't get their colors either because the Downstream O2 Connectors are tucked so far down its exhaustingly impossible trying to reach them. Now, I figured since most of these wires terminate at the PCM behind the Headlight or PDB, there Must be a way to check it there, Correct? Problem is, I don't know what color or wire or Pin # it would be, So that's why I'm here.
First question I guess, is am I on the right track as to My efforts so far? As I have changed the O2 Sensors and still getting the same Codes, Is/are there any other easier/better diagnostic procedure approach that I can use to root out this sore thumb?
2. Where/how can I do a simple test with A Multimeter to see if the heater circuit is Compromised?
Truth is, I would ignore this stupid issue, but, I have ignored it for over a Year now, and I'm getting 15-17mpg. Car is a 2002 Chrysler 300M Special.
Thanks Guys.