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Dan, ASE Certified Technician
Category: Nissan
Satisfied Customers: 1696
Experience:  Auto Technician
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04 Altima 2.5 with codes p2122 p2127 help no 5 volt

Customer Question

04 Altima 2.5 with codes p2122 p2127 help no 5 volt reference on pedal help!!!
Submitted: 1 year ago.
Category: Nissan
Expert:  Dan replied 1 year ago.

Hello my name is***** am an ASE Master Technician and I am glad to help you with your question.

Expert:  Dan replied 1 year ago.

I have seen problems in the wiring harness cause this problem before. I have also seen a faulty ecm cause this problem.

Expert:  Dan replied 1 year ago.

Check the harness by doing a continuity test between the pedal sensor and the ecm. If the harness is ok replace the ecm.

Expert:  Dan replied 1 year ago.

Please reply to this if you need more help and we can continue this conversation at no extra charge. This does not have to be my only answer. If you are satisfied with my service, please rate at the top of the screen. Rating does not close out your question. Remember, sometimes it is difficult to completely diagnose your vehicle without being there, but I will try to give you the best answer I can. Hoping to be giving you 5 star service.


Customer: replied 1 year ago.
but I need pin numbers and wire colors if you could help me with that please
Expert:  Dan replied 1 year ago.

I can send you the test procedures and wiring diagrams from the factory service manual if you would like.

Customer: replied 1 year ago.
Expert:  Dan replied 12 months ago.

Ok if you accept the offer I can email the service manual to you.

Expert:  Dan replied 11 months ago.

Hello again Dan here,

I am contacting you because the post has not been closed or rated.

This question is coming up on 7 days which means it will time out and close.

You have already paid to get this question answered, but you have not rated.

Let me help some more. Is there anything else I can help you with?

If I did not give you 5 star service, please let me know what I missed.


Customer: replied 11 months ago.
I wanted a more detailed answer, like which wire to check what pin on computer colors etc! But instead you opted to just send me a service manual! But I still need the help if your up for it?
Expert:  Dan replied 11 months ago.

The manual will show diagrams of which pins to check and how to diagnose these codes.

Customer: replied 11 months ago.
Send it to***@******.***
Expert:  Dan replied 11 months ago.

Ok I will send it, make sure to rate positively at the top of the screen, and it would be appreciated. Thanks.

Expert:  Dan replied 11 months ago.