P0122

[notlimah]

Hey guys, finally got my stealth plate installed and got everything buttoned back up to go for a spin and had the cel come on throwin the P0122 for low voltage. I read through the troubleshooting briefly but was wondering if there was anything quick I should check since I just had the apps unhooked to install the stealth plate?

[dripley]

If everything working right just clear it and see if it comes back.

[Mopar1973Man]

 

Do the diagnostics. This will help you.

Edited April 6, 2018 by Mopar1973Man

[IBMobile]

4 hours ago, dripley said:

If everything working right just clear it and see if it comes back

  When I changed my injectors I had both the APPs and VP unplugged.  When I started the engine the CEL light was on coding for the APPs and VP.  I cleared the codes and then life was good.  The only thing I can think of is I turned the ignition on with these things unplugged.

 

If it comes back then do the diagnostics.

[notlimah]

Yea I had to turn the ignition on with it unhooked so I’m wondering if that’s all it is. I also didn’t recalibrate the apps after having the batteries unhooked so I may just leave the batteries unhooked for a while, recalibrate and see if it comes back.

[trreed]

Ignition on is what did it.  Usually if I do something like that, the light goes off by itself after 4 driving cycles.  Good plan on the relearn tho.

[Mopar1973Man]

50 minutes ago, notlimah said:

I may just leave the batteries unhooked for a while, recalibrate and see if it comes back.

 

12 minutes ago, trreed said:

Good plan on the relearn tho.

 

Not a good sign though. If you have to do relearns of the APPS sensor all the time to gain a stable system that is a sign of AC noise issue on the ECM. 

[notlimah]

I’d agree with you Mike if this had been happening before and/or I hadn’t just had the APPS disconnected and hooking/unhooking the batteries with it unplugged. 

 

I just reset the codes, unhooked batteries, let sit for an hour or so. Hooked batteries back up, reset APPS. No codes, drove fine.

[Mopar1973Man]

Quicker way.

 

Unhook the batteries leave the ignition key ON for 5 minutes. Turn the key OFF. Then hook the batteries back up. Do the APPS relearn. Done in about 7 minutes or about the same time to enjoy a cold beer and BS with a friend.  

[notlimah]

Cool thanks Mike. The other way worked for me as I was headed out for errands so just unhooked them before I left lol

[Royal Squire]

@Mopar1973Man Mike to do that quick reset do you turn the key on before disconnecting the batteries?

[Mopar1973Man]

On 4/7/2018 at 12:20 PM, Royal Squire said:

@Mopar1973Man Mike to do that quick reset do you turn the key on before disconnecting the batteries?

 

No.

 

1. Turn ignition key OFF
2. Disconnect batteries
3. Turn key ON
4. Wait 5 to 10 mintues
5. Turn key OFF
6. Hook up batteries
7. Do APPS relearn process.

[Royal Squire]

Thank you