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P2173 code

Slipaway16

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#1
Good afternoon all,

I have a 16 Chally HC. 10,700 miles. Performance Mods are 2.85 upper, LMI, SW Catless, ID 1050 injectors, HHP tuned. I was driving on the interstate today, running 78 with my cruise set. As I hit the CANC (cancel cruise) button, I get a CEL light with the P2173 code. The car maintained 70 mph in limp mode until i got off my home exit (3 miles). Once off the exit, I live 2 more miles away. The car stayed in 3rd gear and would only run 30 mph for those 2 miles. I parked the car at home and did a thorough look over for a vacuum leak or an unplugged MAF/MAP connector. Nothing to my average eye. After about an hour, I started the car. CEL stayed on, car idles normal, but has a slight back fire if revved to 2500 rpm. I didn't go over 2500. I have a good friend who is much more mechanically inclined than I that is going to come over tomorrow for a look over. The only P2173 code on the old forum was hpindy and his throttle body issue. Anyone have any suggestions?
 


Hellcatcfp

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#2
Subscribed. Strange.
 


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Slipaway16

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Thread Starter #3
To add, car has been tuned and running fine for 5k miles. Weather is low mid 50's. Today the car was driven mild and not spirited.
 


hellno

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#4
CHECK FOR A VACUUM LEAK
 


hellno

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#5
IT SEEING UNMETERED AIR ,LOOSE AIR INTAKE TUBE ,INTAKE GASKET LEAKS ETC
 


hellno

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GET A CAN OF STARTING FLUID AND SPRAY AROUND THE ENGINE TO SEE IF UYOU GET A CHANGE IN HOW IT RUNS ,ALSO YOU CAN MONITOR THE AIR FULE RATIO SESNORS AND SEE IF THEY GO RICH WHEN SPRAYING AROUND THE ENGINE TO HELP FIND THE VACUUM LEAK
 


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Thread Starter #7
Thanks hellno. I'll give it a shot when I get back to the house.
 


hellno

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#8
Any updates on the p2173 fault???
 


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Thread Starter #9
Unfortunately, I have not had an opportunity to diagnose the issue since we discussed yesterday. I will update this thread as soon as we get to work on it.
 


hellno

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Damn man get going on it lol
 


hellno

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Any news ?
 


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Thread Starter #12
Well, I have good news... but i really don't have a resolution. We sprayed some brake cleaner around all the hoses under the hood. Nothing. Code was still on and car seemed grumpy. So I followed the advice of a trusted Hellcat local. I cleared the code with my handheld and then unplugged the battery for about 30 minutes. I hooked everything back up and gave her a 50 mile test drive. Car was fine. I did a few 40-100 pulls and the car drove 100% normal. So a reset solved the issue, so far. I'll be sure to report back if the issue arises again.
 


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#13
Good to hear you got it figured out 👍
 


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Slipaway16

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Thread Starter #14
Now, I have to get with Curt and ramp my car up to match yours!
 


hellno

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Curt can make it happen
 




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