Dodge Repair Questions? Ask a Mechanic for Answers ASAP
Different code readers display different code descriptions; can you tell me what exactly is the code number you're getting - just the letter and the following 4 digits (ex: PXXXX)?
Thank you. How about a little more detail on the vehicle itself... engine size?, auto or manual trans?, 2 or 4WD? Any modifications or enhancements?
Since you have replaced them, we'll assume the sensors are good. That leaves us with an open sensor ground circuit or an open relay output circuit. Diagnosing this type of code becomes a lot easier when we have access to a DRB-III or equivalent scan tool. Do you have access to one of those? If not, it becomes harder to do but still possible using a good automotive multimeter. Do you have access to one of those?
I'll be online until 8 PM tonight.
I searched the net for "microns digital multimeter" and the results showed a meter used for electronic device work, something I'm not familiar with. I think we'll be OK as long as you know how to use it to measure circuit voltage and resistance. Do you?
I'll be online until 8 PM tonight. Hope you're ready before I have to log out for the day.
Of course. I'm usually on from 2 to 8 PM most weekdays.
Looking forward to working with you!
And you as well
Hi again. Please allow me a few minutes to get re-acquainted with the issue and look up the diagnostic procedures. Be back in a bit...
OK. First, we need to understand that these codes usually set when there is a problem with the circuit. Having said that, the most important step we need to take in our diagnosis would be to perform a thorough visual inspection of the wires and connections that pertain to Bank 2 downstream O2 sensor - focus on possible chafing or burning of insulation that could cause an open circuit. If OK, then turn ignition on and check for voltage going through fuse "U" in the under-hood fuse box (see attached graphic). If voltage at fuse OK, remove O2 Sensor relay and check for voltage at terminal 30. If all those checks come out OK, then we will need a scan tool capable of reading sensor data to continue our diagnosis.
Please let me know what you find.
OK. I'm coming down with a nasty flu, so might not be able to check on you tonight, but I'll try to login tomorrow.
Hi again - feels like I'm back from the dead...
Back to the issue at hand; fuse U should have power with the engine running. If there is no power, then we need to consider an open circuit within the fuse box (PDC) as the cause.
Looking at the attached diagram, we see power should flow from the ASD relay to Joint Connector #2 pin 13 where it should come out at pin 15 to feed fuse U. So, if there's power at pin 13 but not at pin 15, then the problem is with the Joint Connector #2. If there's power at pin 15 but not at fuse U, then the problem is with the PDC.