DTC P2121 And P2127 - Diesel Bombers



5.9 Liter CR Dodge Cummins 03-07 Discussion of 5.9 Liter Dodge Cummins Diesels with Common Rail Injection

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Old 08-06-2008, 10:05 AM
haring164's Avatar
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Default DTC P2121 And P2127

i have an 06 dodge cummins with the edge in it. i have 2 dtcs coming up, p2121 and p2127 both related to the apps sensor. i have replaced the sensor and had the dealer reflash the computer. im still having the same codes come up. ive cleared the dtcs and removed the edge chip but im still having the same problems. its causing the throttle to shut off for 3-4 seconds between 40-50 mphs while accelerating. the dealer had no idea what could still be causing it. anyone have any ideas?
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Old 08-25-2008, 09:51 PM
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Have you tried checking the voltage on the APPS?
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Old 08-25-2008, 09:54 PM
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P2121 - Accelerator Pedal Position Sensor Circuit 1 Range/Performance.

P2127 - Accelerator Pedal Position Sensor Circuit 2 Low Input.

Bad APPS, Short in APPS or possibly bad PCM
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Old 12-31-2008, 08:35 AM
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What was the problem? I have similar issues.
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Old 06-01-2009, 06:50 PM
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Default I have same problem please help

Quote:
Originally Posted by haring164 View Post
i have an 06 dodge cummins with the edge in it. i have 2 dtcs coming up, p2121 and p2127 both related to the apps sensor. i have replaced the sensor and had the dealer reflash the computer. im still having the same codes come up. ive cleared the dtcs and removed the edge chip but im still having the same problems. its causing the throttle to shut off for 3-4 seconds between 40-50 mphs while accelerating. the dealer had no idea what could still be causing it. anyone have any ideas?

I have same problem what should I do?


please help.......
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Old 06-01-2009, 08:01 PM
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If the PCM is causing your problems a reflash will not fix it a new PCM from the dealer is the only thing that will seen this several times at our shop and we always send it out.
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  #7  
Old 12-20-2009, 06:12 AM
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does anyone have any updates on this issue. the problem is only occuring when its raining out or snowing. im starting to think that it is a connection problem under the hood and moisture is getting into a connection somewhere. i recently read that it could be the connectiion on the top of the cp3 pump. Is there any other connections that i may need to pay closer attention to to see if it may be coming from somewhere else?
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