Backed truck off ramps with exhaust disconnected and many codes came up

[Believer45]

I had my truck (2011 Ram 2500 6.7 auto, 166K miles) on ramps in my driveway working on an exhaust leak. I started it with the exhaust disconnected and backed it off the ramps, shut it off and the check engine light came on, a lot of codes came up. They will not clear, cannot clear check engine light. Anyone have any ideas where I should start?

Code	Status	Number	Comment
P02E9	Stored	1 of 12	Diesel Intake air flow position sensor circuit high level 2 of 3
P049D	Stored	2 of 12	EGR Control position exceeded learning limit
P2579	Stored	3 of 12	Turbo speed sensor circuit performance
P2BAC	Stored	4 of 12	Nox exceedence - deactivation of EGR
P049D	Pending	5 of 12	EGR Control position exceeded learning limit
P02E9	Pending	6 of 12	Diesel Intake air flow position sensor circuit high level 2 of 3
P2579	Pending	7 of 12	Turbo speed sensor circuit performance
P2BAC	Pending	8 of 12	Nox exceedence - deactivation of EGR
P049D	Permanent	9 of 12	EGR Control position exceeded learning limit
P02E9	Permanent	10 of 12	Diesel Intake air flow position sensor circuit high level 2 of 3
P2579	Permanent	11 of 12	Turbo speed sensor circuit performance
P2BAC	Permanent	12 of 12	Nox exceedence - deactivation of EGR

 

[crash68]

Until all the sensors have been reconnected, codes won't clear. Also some of the emissions related codes take a certain number of drive cycles and/or time for the codes to be cleared.

 

[Believer45]

Crash68 thank you for your reply. All sensors have been reconnected for close to four months, no change in the issue. The truck ran disconnected for less than a minute. Everything was reconnected and truck was started again, the codes all showed up. Truck has been driven just shy of 3,000 miles since this happened. The truck runs fine, only issue is the remote start will start truck but it will only idle for 10 seconds or so and shuts down. Check engine light is on, fuel economy is fine (16.4), power seems fine both towing and bobtail. I keep thinking this may self clear but no success so far.

 

[Believer45]

Went out and cleared codes, rechecked before starting engine and had this:

Code	Status	Number	Comment
P0101	Stored	1 of 9	Mass Air Flow Sensor "A" circuit performance
P02E9	Stored	2 of 9	Diesel intake air flow position sensor circuit high
P02E9	Pending	3 of 9	Diesel intake air flow position sensor circuit high
P0101	Pending	4 of 9	Mass Air Flow Sensor "A" circuit performance
P2BAC	Permanent	5 of 9	NOx exceedence - deactivation of EGR
P2579	Permanent	6 of 9	Turbo speed sensor circuit performance
P2002	Permanent	7 of 9	Diesel Particulate Filter efficiency below threshold
P02E9	Permanent	8 of 9	Diesel intake air flow position sensor circuit high
P0101	Permanent	9 of 9	Mass Air Flow Sensor "A" circuit performance

 

[Believer45]

Started engine and ran at idle for a few minutes, rechecked codes and had this:

Code	Status	Number	Comment
P0101	Stored	1 of 8	Mass Air Flow Sensor "A" circuit performance
P02E9	Stored	2 of 8	Diesel intake air flow position sensor circuit high
P02E9	Pending	3 of 8	Diesel intake air flow position sensor circuit high
P2BAC	Permanent	4 of 8	NOx exceedence - deactivation of EGR
P2579	Permanent	5 of 8	Turbo speed sensor circuit performance
P2002	Permanent	6 of 8	Diesel Particulate Filter efficiency below threshold
P02E9	Permanent	7 of 8	Diesel intake air flow position sensor circuit high
P0101	Permanent	8 of 8	Mass Air Flow Sensor "A" circuit performance

 

[Believer45]

Looks like one pending code left right now, along with two stored and five permanent codes. Pending is P02E9 intake air flow position sensor high. Truck still runs like new, no issues. I am thoroughly confused, any help where to go from here?

 

[Believer45]

I have been thinking about getting the AlfaOBD program and needed hardware. Would that do better at diagnosing than a basic scanner? I am currently using a Zurich ZR13 that, for the money, seems to do pretty well.

 

[crash68]

AlfaOBD is usually capable of reading and resetting more codes than a typical reader. There are even testing and calibration modes that it can access also along with reading live engine data while it's running

 

[Believer45]

AlfaOBD is usually capable of reading and resetting more codes than a typical reader. There are even testing and calibration modes that it can access also along with reading live engine data while it's running

Thanks, Crash68. I will get what I need ordered and dig into this again when I have everything here.

 

[RamRod37]

Thanks, Crash68. I will get what I need ordered and dig into this again when I have everything here.

looks like you got a wiring issue I would be back tracking where you was working that day on exhaust and check every harness near where you was at seeing that it came up after you done the work wires are broken or lost connection within its connector where ever that may be

 

[Believer45]

RamRod37, thank you for the reply. Good idea, I will dig into it on a warmer day. I do not have a garage and am working on a gravel driveway.

 

[GTyankee]

This website is usually pretty accurate for trouble shooting

https://www.autocodes.com/p02e9_dodge.html

 

[Believer45]

GTyankee, thanks for a great resource. I bookmarked it for future issues. This supports RamRod37 saying to start with wiring. I really appreciate it.