ZippyTheDoggy
Member
- Joined
- September 25, 2023
- Messages
- 17
- Reaction score
- 2
- Location
- Wisconsin
- City, State
- Wisconsin
- Year, Model & Trim Level
- 2015 Police Explorer
Alrighty! Where do I even start? I've got a 2015 FPIU, generally runs good and doesn't have many problems. The biggest issue I've been having is since about a month or two post-ownership, I've had catalytic converter-style problems.
At one point I was up to about 8 DTC's that I'd have appear every now and then, some activating the MIL, but didn't have any severe and immediate issues (stalling, engine performance issues, etc.). I've got some pictures attached (attachment 1, 2, and 3) of these DTCs.
I replaced the vapor canister purge solenoid (attachment 4), and got rid of all but one of those DTCs, P0430, a Catalyst System Efficiency Less Than Threshold - Bank #2, which every now and then triggers my MIL to activate, which I normally just clear- again it's not an immediate issue and isn't causing any issues.
In some of my diagnostics of this issue, I've spotted some possibly concerning numbers. At one point, as seen in attachment 5, my HO2S12 (bank 1 sensor 2) is at .19V, while the HO2S22 is at .77V. Without any in-depth knowledge of anything surrounding the catalytic system, that severe of a difference between banks gained my attention and so it aligned with my idea that possibly my Bank 2 Sensor 2 is having issues and should be replaced; I've got a spare O2 sensor already but I'm considering getting another so I can replace both Bank 2 sensors to eliminate both of them as potential causes of this DTC.
However, after around an hour of driving around and pushing the vehicle up to higher RPMs, which has triggered the MIL in the past, as well as a higher engine load up-hill, which also has triggered the MIL in the past, I've got nothing. Attachment 6 shows the graph of my sensors after that hour or so of driving around trying to get my MIL indicator to light up so I'd know what the sensors were reading exactly at the moment that it activated.
Overall the game plan is replace both Bank 2 sensors, if that doesn't work, I'd be looking at replacing the whole bank 2 catalytic converter.
I'm looking for some general information on norms of O2 sensors for this vehicle (2015 FPIU, 3.7L), as well as possibly any ideas of further diagnostics to perform to either ensure that it's an O2 sensor that's bad, or even if there's some way to rule that out and figure out that all that's left to do is replace the catalytic converter itself.
I do have quite a few recordings of my PCM's data stream that I can look at from the past to see other information like fuel trim, I haven't combed through all that data yet but I can in the future if someone would like a look at that.
Bringing up fuel trim, however, I've had issues with my DTE calculations, where after filling my tank most recently, it says I can go 780mi till empty. I don't know if that has anything to do with the issues that could be going on, or if I've just got to reset my fuel trims every now and then or re-calibrate my DTE calculations. See attachment 7 and 8.
At one point I was up to about 8 DTC's that I'd have appear every now and then, some activating the MIL, but didn't have any severe and immediate issues (stalling, engine performance issues, etc.). I've got some pictures attached (attachment 1, 2, and 3) of these DTCs.
I replaced the vapor canister purge solenoid (attachment 4), and got rid of all but one of those DTCs, P0430, a Catalyst System Efficiency Less Than Threshold - Bank #2, which every now and then triggers my MIL to activate, which I normally just clear- again it's not an immediate issue and isn't causing any issues.
In some of my diagnostics of this issue, I've spotted some possibly concerning numbers. At one point, as seen in attachment 5, my HO2S12 (bank 1 sensor 2) is at .19V, while the HO2S22 is at .77V. Without any in-depth knowledge of anything surrounding the catalytic system, that severe of a difference between banks gained my attention and so it aligned with my idea that possibly my Bank 2 Sensor 2 is having issues and should be replaced; I've got a spare O2 sensor already but I'm considering getting another so I can replace both Bank 2 sensors to eliminate both of them as potential causes of this DTC.
However, after around an hour of driving around and pushing the vehicle up to higher RPMs, which has triggered the MIL in the past, as well as a higher engine load up-hill, which also has triggered the MIL in the past, I've got nothing. Attachment 6 shows the graph of my sensors after that hour or so of driving around trying to get my MIL indicator to light up so I'd know what the sensors were reading exactly at the moment that it activated.
Overall the game plan is replace both Bank 2 sensors, if that doesn't work, I'd be looking at replacing the whole bank 2 catalytic converter.
I'm looking for some general information on norms of O2 sensors for this vehicle (2015 FPIU, 3.7L), as well as possibly any ideas of further diagnostics to perform to either ensure that it's an O2 sensor that's bad, or even if there's some way to rule that out and figure out that all that's left to do is replace the catalytic converter itself.
I do have quite a few recordings of my PCM's data stream that I can look at from the past to see other information like fuel trim, I haven't combed through all that data yet but I can in the future if someone would like a look at that.
Bringing up fuel trim, however, I've had issues with my DTE calculations, where after filling my tank most recently, it says I can go 780mi till empty. I don't know if that has anything to do with the issues that could be going on, or if I've just got to reset my fuel trims every now and then or re-calibrate my DTE calculations. See attachment 7 and 8.
