Help understanding permament OBD fault - Pontiac Solstice Forum
 
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post #1 of 8 (permalink) Old 05-24-2019, 02:29 PM Thread Starter
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Help understanding permament OBD fault

bottom line up front- the car passes all inspection criteria, and today. The car is throwing no OBD DTCs.

But I noticed on my paperwork a Permanent OBD fault code: 7F 0A 11

I think (just think) this means a false-positive error for an unsupported fuel pressure.

Anybody have better info?? Can't find it on 'search' here, google-fu turns up more questions than answers.

Driving and working on a Sly 2008 Solstice GXP 5spd 260/260, and the worst-built 2012 LS3 Camaro 1SS to escape from Oshawa.

Gone but not forgotten:
2007 Solstice GXP 5 speed 290/340

Stored and needing to part ways with a 1970 Skylark Custom convertible I have owned since 1989 and turned into a GS455 clone. 462 with 7/8 primary headers, adjustable roller rockers, TA Performance Stage 1 aluminum heads, auto, Chevy 12 bolt, 3.31:1. Sadly a project car now but a driver from '89 to '06.
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post #2 of 8 (permalink) Old 05-24-2019, 02:48 PM
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No idea. Sorry

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post #3 of 8 (permalink) Old 05-24-2019, 03:01 PM
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As far as I know, the Kappa does not have permanent fault codes. They were phased in starting in 2010, so i don't know why they would show up for any of our cars.

John
Lexington, KY
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post #4 of 8 (permalink) Old 05-24-2019, 03:19 PM Thread Starter
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That's what it reads on my Massachusetts State Vehicle Inspection Report. Very last entry:

OBD Permanent Fault Codes
_________________________
7F 0A 11

I've found ref to 'general fault' 'unsupported' and 'fuel pressure'. Also found ref to mode 7 being for 'unconfirmed fault codes', useful for check after repair, so a long test period wouldn't be needed.

Maybe the inspection software is looking for something, cannot find it since it isn't supported, and reports a false positive. Had it done at a Cadillac dealer.

Driving and working on a Sly 2008 Solstice GXP 5spd 260/260, and the worst-built 2012 LS3 Camaro 1SS to escape from Oshawa.

Gone but not forgotten:
2007 Solstice GXP 5 speed 290/340

Stored and needing to part ways with a 1970 Skylark Custom convertible I have owned since 1989 and turned into a GS455 clone. 462 with 7/8 primary headers, adjustable roller rockers, TA Performance Stage 1 aluminum heads, auto, Chevy 12 bolt, 3.31:1. Sadly a project car now but a driver from '89 to '06.
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post #5 of 8 (permalink) Old 05-24-2019, 04:04 PM
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And what did the dealership say when you asked them about it?


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post #6 of 8 (permalink) Old 05-24-2019, 04:59 PM Thread Starter
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didn't notice until I got home

Driving and working on a Sly 2008 Solstice GXP 5spd 260/260, and the worst-built 2012 LS3 Camaro 1SS to escape from Oshawa.

Gone but not forgotten:
2007 Solstice GXP 5 speed 290/340

Stored and needing to part ways with a 1970 Skylark Custom convertible I have owned since 1989 and turned into a GS455 clone. 462 with 7/8 primary headers, adjustable roller rockers, TA Performance Stage 1 aluminum heads, auto, Chevy 12 bolt, 3.31:1. Sadly a project car now but a driver from '89 to '06.
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post #7 of 8 (permalink) Old 05-24-2019, 05:21 PM
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A permanent fault is one that a scan tool will not reset, and that will not reset when the battery is disconnected. It does not cause a MIL and it would not be cause for emissions failure assuming that the other parameters are satisfied. It will be reset when the ECM records a sufficient time/distance/cycles to indicate that the fault is actually gone.

Since our ECMs pre-date their roll-out, I don't see how one can be recorded. It could be that the testing software shows that to indicate that the feature is not available in that ECM.

John
Lexington, KY
Sky NA 2007 Midnight Blue
Sky RL 2008 Carbon Flash - Naked
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post #8 of 8 (permalink) Old 05-24-2019, 06:10 PM Thread Starter
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Sorta what I've been thinking all along. "Unsupported" probably refers to the unit under test not having a possible feature, it's a "permanent" thing since the ECM doesn't have it and never will, and the specific reason is probably dependent on a cyclic/algorithmic/timeout issue during which the test software performs some task, be it time, number of tries, or similar, and my roulette wheel lands on 11 for whatever reason. I expect to see this with every inspection I have for the car.

I was never worried about it, just curious. Thanks for guessing along with me. We'll probably never know exactly what is happening, but I am very curious to see if any other MA owners get a similar result. I also wonder if the test equipment in MA is the same as the test equipment elsewhere. Never thought about it before.

Driving and working on a Sly 2008 Solstice GXP 5spd 260/260, and the worst-built 2012 LS3 Camaro 1SS to escape from Oshawa.

Gone but not forgotten:
2007 Solstice GXP 5 speed 290/340

Stored and needing to part ways with a 1970 Skylark Custom convertible I have owned since 1989 and turned into a GS455 clone. 462 with 7/8 primary headers, adjustable roller rockers, TA Performance Stage 1 aluminum heads, auto, Chevy 12 bolt, 3.31:1. Sadly a project car now but a driver from '89 to '06.
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