Anti theft system light flashing on dash, codes P1610, U1000 and U1001

Tiny
SAFYRE_JEN
  • MEMBER
  • 2004 NISSAN MAXIMA
  • 3.5L
  • V6
  • 2WD
  • AUTOMATIC
  • 1,800 MILES
Just purchased this car. Bought a vehicle specific fitment fuel pump, installed the new fuel pump and tried to start the car after everything was done. Turned out that the battery, installed on 8/2018, was dead because someone had left the dome light on, draining the battery completely. We tried to charge it a bit with a friends van before attempting to jump start it, however no matter how long we let it sit hooked to the running van or tried to start it it would crank and crank but refused to turn over and start up. We had an OBD-II reader with us and hooked it up to see if there were any new codes. The code for the faulty fuel pump we replaced cleared, however we were greeted with three new codes in it's place that wouldn't clear. Those codes are P1610, U1000 and U1001. We have looked them up and have pretty much figured that it's the anti theft system, the light on the dash flashes when attempting to start it, blocking us from being able to get it running. But I am also not 100% convinced that is the full problem because I have been trying to find anyone else who's had those same three codes pop along with the same or similar issues as we've had. The fuel pump is working properly, we checked it out before running the OBD-II reader. Is it as simple as the NATS preventing us to start the car because the battery was allowed to completely die before we changed the old fuel pump with the new one? Please, any information or assistance would be massively appreciated more than you could know because I have been trying to get this dealt with for over a month now because I can't afford to have it towed, let alone towed to a dealership to have them charge me an arm, leg and first born child to diagnose and/or repair or even to reprogram the key and key fob. Thank you so very much in advance for whatever help or information you can provide me with.

Sincerely,
Going Insane in Indiana
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Monday, June 24th, 2019 AT 6:28 AM

5 Replies

Tiny
SCWICKEDSTANG
  • EXPERT
Hello,

I hate to be the bearer of bad news, but if your vehicle's anti theft light is blinking with a no start, then your vehicle's ignition keys will have to be programmed to your vehicle. There are only two places that can do this for you, the dealership or a locksmith. If you are just purchasing this vehicle, you might want to inquire with the person who you purchased this vehicle from why you are having to do this. If you would like, we can give you the factory troubleshooting guides for each of the Direct Trouble Codes (DTC)(s) you have listed above. Please let us know on the DTCs and keep us informed about the anti theft.

Thanks,
Alex
2CarPros
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Monday, June 24th, 2019 AT 9:23 AM
Tiny
SAFYRE_JEN
  • MEMBER
Well that is very disappointing and makes me more than a little irate since the seller told me that the only issues with it before I bought it was needing the fuel pump. Replaced and that the driver side window had been broken and that there was nothing else wrong with the car, which apparently was a lie since one tire was on a spare and the battery dated 8/2018 was completely dead from them leaving the dome light on and an ant infestation in the back seat. Tail light cover needs replaced (that one isn't actually a big deal for me) and apparently the only key they gave me with the car is more than likely crap and I will have to figure out how in the world I am going to be able to afford a dealership or locksmith to reprogram it. Thank you so much for the quick reply to my inquiry and yes I would greatly appreciate the factory troubleshooting guides for the DTCs. Maybe I will get lucky and one of those fix my problem. Thank you again so much.
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Monday, June 24th, 2019 AT 12:31 PM
Tiny
SCWICKEDSTANG
  • EXPERT
Hello again,

I hate to hear when someone gets taken advantage of like that, and I am sorry. I have good news and bad news for you. Good news is that DTC U1000 and U1001 ar DTCs concerning Connecting Area Networks (CAN) system, and this might to blame for your ignition key not working. The bad news is you need the dealership scan tool to diagnose and fix the problem. Anyway I have included all the information I have on the three DTCs in the diagrams down below. Please go through them and keep us informed on how things are progressing, and please, if we can help in any other way, do not hesitate to ask.

Thanks,
Alex
2CarPros
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Tuesday, June 25th, 2019 AT 10:34 AM
Tiny
SAFYRE_JEN
  • MEMBER
Thank you so much. Yes, being taken advantage of sucks but it happens and nothing I can do about it now. Hopefully with the information and help y'all have given me we can get the car back to running again, if I'm really lucky I won't have to deal with dealership's outrageous fees. Y'all have helped me and provided me with more information in the past day than I have been able to get or find in the last month concerning this. I'm very grateful y'all do are here to help people. Y'all are wonderful people and I'm so thankful I found this site. I will post an update when I have one, or ask for more information if I need it.
Thanks again to you generous, helpful people.
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Tuesday, June 25th, 2019 AT 12:40 PM
Tiny
STEVE W.
  • EXPERT
For key issues like this a locksmith can be much cheaper than a dealer when it comes to programming them into the system. The codes you have can all be caused by a dead battery as well. The fix on some Nissans is to clean the ground connections as they can corrode and cause them. The P1610 is a lockout code from repeated starting attempts with a failed key, the U codes can both be caused by a dead battery not waking the PCM.
What I would do first is clean the battery connections at both ends. Now put a good fully charged battery into the car. Now try your key. If the security light is still flashing with the key in then it is likely the key has been forgotten and will need to be programmed back into the system.
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Wednesday, June 26th, 2019 AT 12:13 PM

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