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P0430 and FORSCAN

ULDlose

Member
Joined
January 22, 2008
Messages
14
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City, State
Lyndhurst, NJ
Year, Model & Trim Level
2013 Explorer XLT 3.5 NA
I'm new to using Forscan. I'm used to using a Snap-on Verus Pro where you just click what you want and displays the data(unfortunately not available anymore to use anymore). Can someone point me in the right direction of selecting the Right Oxygen Sensor Voltage PIDS to scope B1S1 B1S2 B2S1 B2S2 using Forscan. There are way to many options and I start to forget which one is tried and which ones I didn't.

The car is a 2013 Ford Explorer XLT 4WD 3.5L N.A.

Thank You In Advance.
 



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Unfortunately I am unable to help with the PIDS selection but it seems you have an issue possibly affecting the catalytic converter.

P0430 Catalyst System Efficiency Below Threshold (Bank 2)
Basically this means that the oxygen sensor downstream of the catalytic converter on bank 2 is detecting that the converter is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system. Symptoms

Read more at: https://www.obd-codes.com/p0430
Copyright OBD-Codes.com

I'm sure another member will have the answer you seek. Good luck.

Peter
 






Unfortunately I am unable to help with the PIDS selection but it seems you have an issue possibly affecting the catalytic converter.

P0430 Catalyst System Efficiency Below Threshold (Bank 2)
Basically this means that the oxygen sensor downstream of the catalytic converter on bank 2 is detecting that the converter is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system. Symptoms

Read more at: https://www.obd-codes.com/p0430
Copyright OBD-Codes.com

I'm sure another member will have the answer you seek. Good luck.

Peter

Thank you for your Input Peter. I am well versed in diagnostics and repair. I just haven't fully figured out Forscan yet its not as simple as the scanners (Snapon,Etc) I have used in the past. I'm trying to Pull Up the oxygen sensor Pids so I can Scope them and watch what all the sensors are doing and compare the data against Known Goods. I don't wan't to start replacing parts that don't have to be. I also edited the original post to specify that I'm looking for oxygen sensor voltage PIDS to help future members looking for answers.
 






Thank you for your Input Peter. I am well versed in diagnostics and repair. I just haven't fully figured out Forscan yet its not as simple as the scanners (Snapon,Etc) I have used in the past. I'm trying to Pull Up the oxygen sensor Pids so I can Scope them and watch what all the sensors are doing and compare the data against Known Goods. I don't wan't to start replacing parts that don't have to be. I also edited the original post to specify that I'm looking for oxygen sensor voltage PIDS to help future members looking for answers.

A man after my own heart...haha

If your looking for some good OBD2 **** for your 2013 here is Ford's official OBD2 strategy guide (code setting criteria):

http://www.fordservicecontent.com/ford_content/catalog/motorcraft/OBDSM1300.pdf
 












Please help;

Forscan owners/users. May we ask a favor to collect a FORSCAN trace of a good running state of the engine?
Preferable the PCM module trace. And share the .fsl file?
I would need to compare with what my forscan trace in the PCM module.
Mainly, LONGFT1, LONGFT2, O2S11_CUR, O2S11_IMPED, O2S12, O2S12.STFT, O2S12.VOLT, O2S21_CUR, O2S21_IMPED, O2S22, O2S22.STFT, O2S22.VOLT, RO2FT1, RO2FT2, SHRTFT1, SHRTFT2

My car shows fairly stable O2S12 and O2S22 quite constant 0.8V at idle. under acceleration (vehicle parked) they go shortly to 0.85V, and when releasing gas pedal, they go for a very short time to 0.1V, then short "stop" at 0.3V, 0.5V and back to 0.8V. My understanding they should be around 0.5V steady state (idle).
Also, I am trying to figure out the pre-CAT sensors (the "1"s), to see the closed loop oscillations/fluctuations between 0.3V to 0.7V. The only metrics I see are O2S11_CUR - showing the currents in mA and O2S11_IMPED (sensor impedance expressed as voltage) and those are staying fairly steady at 0.09 V, non fluctuating. I would have said my engine is messed, but the short term fuel trims look OK. Also the ROFT1/2 - rear O2 fuel trim varies slightly at the 2% mark.

Hence a clean good working trace would be good to compare.
 






Keep in mind that the upstream sensors are not what you may be used to. Instead of the old 4-wire sensors, these are 6-wire Universal heated exhaust gas sensors. They behave very differently from the old style.

Download the OBDII manual for your truck so you can get an idea of how they work and how the catalyst monitor works.
 


















Reviving this thread, after doing a bit more research. I have now both P0420 and P0430 codes. Looking at the forscan logs, I can see the after cat O2 sensors stay fairly steady at 0.8V meaning they perceive a rich environment. The AFR sensors/ pre cat O2 sensors are indeed wideband (NTK), and they show < /- 0.1 mA; Short fuel trim shows few percent (say 3% average at idle). I was reading a faulty EGR can make the exhaust rich, but we have Variable valve control that replaces the EGR, and I am thinking, if VANOS would be faulty, an error should be noticed. Quick engine revving followed by idle shows the post cat sensors show the 0.1V as they should, making me believe the sensors might be OK?
I understand the fault codes recommend the cat converter change, but somehow, I do not believe the cat converters are truly at fault. If cat would be bad, i should see variation on the post cat O2 sensor, not just a fairly steady at idle 0.8V. Does not sound right. I do not want to take to mechanics and start changing unnecessary parts by trial/error. The "Let's start with this" saga....

forscan snapshot for forum.jpg
 







Peter
 






thank you Peter! reviewed the threads, and on the second thread; on that thread , raiderv on June 11, 2018 post a picture with the downstream/2nd oxygen sensors output graph, and they resemble a lot what I see on my car. A fairly steady 0.8 V, with a drop to 0.1V when system gets shortly lean. But it does not go to the middle (0.5V) I would expect. In those threads i could not see if he fixed the issue, and how he fixed it. similar to what i read from habeebahm's posted graph. he said the plug spacers worked for him

Asked here and facebook for someone to collect a clean forscan log, but nobody wanted to do any log collection... I will take these days a direct voltage reading from the sensor to compare with the pcm output
 






thank you Peter! reviewed the threads, and on the second thread; on that thread , raiderv on June 11, 2018 post a picture with the downstream/2nd oxygen sensors output graph, and they resemble a lot what I see on my car. A fairly steady 0.8 V, with a drop to 0.1V when system gets shortly lean. But it does not go to the middle (0.5V) I would expect. In those threads i could not see if he fixed the issue, and how he fixed it. similar to what i read from habeebahm's posted graph. he said the plug spacers worked for him

Asked here and facebook for someone to collect a clean forscan log, but nobody wanted to do any log collection... I will take these days a direct voltage reading from the sensor to compare with the pcm output
were you able to figure out what the problem was? im having the same issue with the exact readouts on my sensors as well.

thanks
anthony
 






In my case the cat converters were faulty. But that did not come from the measurements shown above. Used the mode 6 with forscan and showed the oxygen storage capacity was out of spec. Oxygen sensor readings were within range as they were working fine. Our cars have a universal wideband upstream sensor that make the graph of downstream sensor different from what it used to be in the past with narrowband upstream sensors.

What is the problem you experience?
 






In my case the cat converters were faulty. But that did not come from the measurements shown above. Used the mode 6 with forscan and showed the oxygen storage capacity was out of spec. Oxygen sensor readings were within range as they were working fine. Our cars have a universal wideband upstream sensor that make the graph of downstream sensor different from what it used to be in the past with narrowband upstream sensors.

What is the problem you experience?
I'm having the p0420 and p0430. I also have a rough idle when at operational temp. What's odd is when I pull up the error codes in forscan I get 2 codes under the pcm but only one code under the obd2 portion.

What do you mean mode 6? Where is that?

Thanks
Anthony
 






I'm having the p0420 and p0430. I also have a rough idle when at operational temp. What's odd is when I pull up the error codes in forscan I get 2 codes under the pcm but only one code under the obd2 portion.

What do you mean mode 6? Where is that?

Thanks
Anthony
>> I'm having the p0420 and p0430. I also have a rough idle when at operational temp. What's odd is when I pull up the error codes in forscan I get 2 codes under the pcm but only one code under the obd2 portion.

Yes, this is how it happens. You have in practice both errors.

>> What do you mean mode 6? Where is that?
Go to forscan (i attached a snapshot), click the check sheet button - the one under the oscilloscope (sine wave) button-, and there select the mode 6 test. Look at the attach picture wit mode 6 forscan on my car. That was after i changed the radiator cat, so i was left with the firewall cat being bad.

forscan mode6 16Jan2023_forumUpdate.jpg
 






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