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Discussion Starter · #1 ·
Check Emissions and SH-AWD lights came on the other day, took to honda dealer and they said P0430 and P2247 codes were obtained. They ordered an O2 sensor to try first, but claim it may not be the fix, it could be the catalytic converter (CC). Events leading up to these lights:
1) filled up tank with 93 octane at Sams Club
2) removed bluetooth module harness because we were having issue and starting on weekend trip, did not want to drain battery
3) drove ~80 miles before lights came on, typically only use vehicle around town

I understand the acura has extended the warranty on the CC to 120K, unfortunately our 2007 has 125K, so I will be calling acura, but doubtful they will warranty the CC. Lights are currently reset, but O2 sensor is on the way, my question, should i replace the O2 sensor or wait to see if it comes back. This happened once before (~4 yrs ago) and honda dealer cleaned or replaced EGR valve, not sure of the codes back then, but we had the same 2 lights. Any insight would be appreciated.
 

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Hello - Last week I had the Check Emissions light but it was a P0401 and SH-AWD lights - I dont think the SH-AWD was impacted. Call Acura or get the dealer to call for you and see what they can do to help you get covered under the extended the warranty on the CC its not out by much.

A google search on the code P0430 found your code is different and suggests the CC and the O2 Sensors

P0420 Rear Bank Catalyst System Efficiency Below Threshold (Bank 1)
P0430 Front Bank Catalyst System Efficiency Below Threshold (Bank 2)

Oxygen sensors and or catayltic's

This board has saved me some $$$ so I hope this helps you as well

Cheers
 

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Discussion Starter · #3 ·
Emission light stayed off for awhile once Dealer reset and recently came back on, but then went out after 1 day. I am hesitant to spend the $300+ on an O2 sensor without knowing it will correct the issue. Anyone have info on a cheap code reader that would work for an '07 MDX? I am leaning on cleaning the EGR valve/port, I had this done back in '11 when both my Emission Light and SH-AWD light came on, but not sure on the codes back then. Any insight/recommendations would be appreciated.

Thanks,
VAGator
 

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Doubtful that EGR fixes will help since you don't have an EGR code.

Code 2247 for Bank 2 AF sensor Vcent High Voltage. This implies an open somewhere in circuit; sensor, wiring, connector, or PCM. A fair amount of diagnostics are required to discern the true problem. See attached pages from 03-06 shop manual. Your 07-13 MDX may be different, but probably very similar.

A fault in Bank 2 AF sensor circuit could account for P0430 ( catalytic converter efficiency Bank 2).

good luck
 

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Discussion Starter · #5 ·
Thanks for this information TexasHonda, info sparks some questions:
1) Would an open circuit be intermittent, our emission light is...ON/OFF
2) I did remove and reinstalled the bluetooth module just prior to the trip in which the emission and SH-AWD light came on, any chance this could have caused an electric issue. Seems like i have read similar events within the forums, but nothing definitive
3) Assume changing out the O2 sensor ($300+) is not recommended?
4) Any recommendations on a cheap code reader?
 

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1) Certainly an open circuit fault can be intermittent.
2) doubtful Bluetooth system is related to your problem
3) No, unless further diagnostics point to AF sensor as source of fault
4) I don't have any recommendation other than a wireless Obd2 system. Suggest checking amazon and reading user reviews for guidance.

good luck
 

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Discussion Starter · #7 ·
Still having issues with codes, currently just resetting every time. I sometimes only get the P0430 and sometimes only get the P2247 code. Honda dealer wanted to start replacing components starting with the O2 sensor, this could get rather expensive. Anyone have any recommendations, hoping someone on this forum has had the same codes and were able to resolve with a definitive fix. I am leaning towards cleaning/replacing the EGR valve, did this several years ago when getting a code and resolved until recently.

Thanks,
VAGator
 

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Hey wanted to kick up this old thread as I'm having the same issues. P2247 code and SH-AWD. The SH-AWD doesn't really seem to happen anymore but the P2247 code does. It has gone off at times but will always come back on. Looks like I can get a replacement O2 sensor for around $135 at auto zone. Don't want to spend a ton of money taking this into the shop if I don't have too as it's 10 years old (2008) and I don't want to drop a ton of cash if I don't have too. Currently have 107k on it. Any additional thoughts? Is it worth it for me to get the O2 sensor and replace? Further up in the thread someone mentioned the CC warranty extended to 120k miles and since I'm well under 120k that's good. Would an ODBC device tell me exactly what the problem is??
 
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