Codes P0122 and P1299

jimjeep0 · **Posted:** Fri May 30, 2008 11:45 am

Any body ever get these codes,0122 is throtle related and 1299 is manifold or vacuum.
Any help would be appreciated. not always on- intermitant
Thanks

Fulltimer · **Posted:** Fri May 30, 2008 3:07 pm

PO122 = Throttle/Pedal Position Sensor/Switch A Circut Low Input

P1299 = I don't have one for that code. Mine only go to PO804

Terry

jakewire · **Joined:** Wed May 14, 2008 3:21 pm **Posts:** 25

P1299 Vacuum leak detected .... as per this link which it looks as if it is the same problem you are having.

http://www.jeepforum.com/forum/archive/ ... 70168.html

Jake

jimjeep0 · **Posted:** Fri May 30, 2008 7:07 pm

Thanks.
Sounds like I will start with the TPS. Any ideas where it is?
Thanks again
Jim

jakewire · **Joined:** Wed May 14, 2008 3:21 pm **Posts:** 25

jimjeep0 wrote:

Thanks.
Sounds like I will start with the TPS. Any ideas where it is?
Thanks again
Jim

The 3-wire throttle positioning sensor is mounted on the throttle body and is connected to the throttle blade shaft.

http://www.partsamerica.com/ProductDeta ... 80&PTSet=A

Jake

jimjeep0 · **Posted:** Sat May 31, 2008 12:57 pm

I changed out TPI, Light and codes still on dash. Do i need to have them reset or did I not fix problems? Could I have put TPI in wrong?
Anybody got any thoughts.

jakewire · **Joined:** Wed May 14, 2008 3:21 pm **Posts:** 25

jimjeep0 wrote:

I changed out TPI, Light and codes still on dash. Do i need to have them reset or did I not fix problems? Could I have put TPI in wrong?
Anybody got any thoughts.

If you don't have a code reader that can clear codes then I THINK (not sure) that if you just disconnect the neg on the battery for 10 minutes the codes will clear.

You won't know if you fixed the problem until you clear the codes.

Jake

jimjeep0 · **Posted:** Tue Jun 03, 2008 11:46 am

After about 5 or 6 starts, Code cleared on its own. Light is out and has not come back after about 350 miles.
Air bag light that I assumed was part of same issue has remained on.
Thanks to all for help as usual.
Jim

jimjeep0 · **Posted:** Tue Jun 03, 2008 6:45 pm

Just did key on off thing and realized codes are still there but light has not come back on.
Air bag light still on.

2jeepdrivers · **Joined:** Thu Apr 10, 2008 10:07 pm **Posts:** 9

Unhook your battery to clear the codes. Then if it throws any more they are new ones. Once it throws a code it will store it even if you fixed the problem.

jakewire · **Joined:** Wed May 14, 2008 3:21 pm **Posts:** 25

jimjeep0 wrote:

Just did key on off thing and realized codes are still there but light has not come back on.
Air bag light still on.

If the lights turned themselves off from driving then what you did fixed your problem. The codes you are seeing could be pending codes from the onset of your problem which wouldn't clear from driving.

As I posted before, disconnect the neg on your battery for 10 minutes.

Jake

Codes P0122 and P1299

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