OBD2 scan code "p2ba9" SHOWED UP !!!!!

18877 Views 5 Replies 5 Participants Last post by AggiePate, Nov 12, 2014

granite

Discussion Starter · May 7, 2014

2014 Jeep GC Eco Diesel Limited, 3 months old at 6k miles..........
This is whats going on. As of the past few days when I remote start it shuts off immediately. I have been remote starting from day 1 without any issues except for the one time it wouldn't start due to very low fuel left in tank which is a good thing as not to bring it any lower. This morning again, remote start and off almost immediately. By chance I realized the idiot light was lit. This is the "MIL" which means "Malfunction_indicator_lamp" and not

mother in law. I checked the Mopar app on my Samsung Galaxy3 which doesn't say much except for the

dealer stuff I don't want to know about.
So I whipped out my OBD2 scanner which came up with code "P2BA9". I GOGGLED it and got this "NOx Exceedence - Insufficient Reagent Quality" which means nothing to me. I did clear the code and so far 50 highway miles later still good.
Anyone ?? know about this. Please advise, Granite !

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MDBones

· #2 · May 8, 2014 (Edited)

NOx Exceedence - Insufficient Reagent Quality

This refers to the DEF system. It can be an issue with a sensor, wiring, an injector or the quality of the DEF itself. I know they've had issues with the DEF injector.

People have reported the failure of remote start to keep the engine running under those conditions. Have your dealer check the system. I'd be surprised if there isn't a TSB out on this by now.

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AggiePate

· #3 · Nov 11, 2014

This is good to know. the MIL has been coming on in my ecodiesel the last two weeks and when I took it to the dealer it did not have any codes stored. However I haven't been remote starting it lately because, honestly, I have look for the remote which is normally at the bottom of the purse!! Anyways, did the remote start as we headed out the door for lunch since it was getting cold. When we reached the Jeep, not on. Thought maybe I didn't hit the buttons well. So tried it again when we left the restaurant and same thing. So, I will definitely be telling this when they return my call.

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ExcursionDiesel

· #4 · Nov 12, 2014 (Edited)

My prediction...your Catalytic Converter is failing and the NOx sensor is affected. The DEF injection is close loop controlled by the NOx reading. Your DEF Injector and/or pump may be partially clogged with chrystalization due to low flow. It may clear for a while then return later. Mine eventually had the injector and pump replaced before finally getting to the root cause...bad Cat. A new Cat fixed everything.

This is a well documented issue and odds are this is the case.

Now, that being said, bad quality DEF can be the cause. Did you add DEF recently?

Also, remote start won't stay running when the CEL is on or the low fuel light is on. When you reset an emissions related code, it takes ~150 miles and a few drive cycles for it to come back if the conditions still exist. The onboard diagnostics test take that long to fully retest.

There is a recently TSB released that's an ECU flash which may address your issue. It addresses overly sensitive limits on various sensors. Get the update asap if possible.

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vandkb

· #5 · Nov 12, 2014

ExcursionDiesel said:
My prediction...your Catalytic Converter is failing and the NOx sensor is affected. The DEF injection is close loop controlled by the NOx reading. Your DEF Injector and/or pump may be partially clogged with chrystalization due to low flow. It may clear for a while then return later. Mine eventually had the injector and pump replaced before finally getting to the root cause...bad Cat. A new Cat fixed everything.

This is a well documented issue and odds are this is the case.

Now, that being said, bad quality DEF can be the cause. Did you add DEF recently?

Also, remote start won't stay running when the CEL is on or the low fuel light is on. When you reset an emissions related code, it takes ~150 miles and a few drive cycles for it to come back if the conditions still exist. The onboard diagnostics test take that long to fully retest.

There is a recently TSB released that's an ECU flash which may address your issue. It addresses overly sensitive limits on various sensors. Get the update asap if possible.

When my MIL light was on, my remote start wouldn't work either. The dealer told me that it is a self-cancelling feature to prevent engine damage should the MIL be on for something serious - seems like a good safety measure. The update that came out in mid-October seemed to stop my NOx sensor issue. It was supposed to adjust the sensitivity of the sensor. Maybe just my imagination but, I do NOT get DEF at truck stops. I buy at Walmart and AdBlue has the Chrysler spec on the box. The spec ensures the correct % of Urea in the distilled water. If wrong %, this will definitely cause NOx issues.
My O2 sensor issue seemed to be attributed to a loosely installed oil fill cap (done by the dealer) so be careful at other places e.g. Jiffy Lube.

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AggiePate

· #6 · Nov 12, 2014

ExcursionDiesel said:
My prediction...your Catalytic Converter is failing and the NOx sensor is affected. The DEF injection is close loop controlled by the NOx reading. Your DEF Injector and/or pump may be partially clogged with chrystalization due to low flow. It may clear for a while then return later. Mine eventually had the injector and pump replaced before finally getting to the root cause...bad Cat. A new Cat fixed everything.

This is a well documented issue and odds are this is the case.

Now, that being said, bad quality DEF can be the cause. Did you add DEF recently?

Also, remote start won't stay running when the CEL is on or the low fuel light is on. When you reset an emissions related code, it takes ~150 miles and a few drive cycles for it to come back if the conditions still exist. The onboard diagnostics test take that long to fully retest.

There is a recently TSB released that's an ECU flash which may address your issue. It addresses overly sensitive limits on various sensors. Get the update asap if possible.

When I took it in over a week ago, they stated that they did a bunch of updates. Just didn't tell me what was updated. Of course, when I dropped it off, the stupid light was not on. They checked the stored codes and said that there was nothing showing, blah blah blah. Five days later, while on the freeway it came on again and stayed until the next day when I got in it at lunch. Poof light is gone! And then yesterday on again, but noticed the remote start.

We found out about 3 months after we got the Jeep that it had to have arrived at the dealer from the plant with a very scarce amount of DEF in it. It wasnt until we got the warning that we found out about that. The dealership filled it to capacity after the husband had a fit. So what's in there is whatever the Dealership has. And we are still good on the levels as well.

If I can't the SA on the phone again today, I am just showing up tomorrow morning and demanding they get it fixed. Along with a couple of things that they failed to address last week.

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