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Codes P1820, U1000 and P1808, engine cranks but will not start?

Tiny
ANDRIN ATEM
  • MEMBER
  • 2012 NISSAN XTERRA
  • 23,010 MILES
Please, I am having this issue with my car, it won’t start but it cranks. I have these fault codes p1820 and U1000 as well as P1808. Please help me figure out how to repair this fault. I am a mechanic.
Sunday, July 9th, 2023 AT 8:11 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,057 POSTS
The communication code will be the problem, the others are for non-essential engine performance issues.

I would start by checking the fuses here is a guide that can help, and I have included the fuse locations as well. If all fuses are good, I would swap out the ECM relay (the ECM relay maybe interrogated into the IPDM which might be bad).

https://www.2carpros.com/articles/how-to-check-a-car-fuse

U1000: This code signifies a communication problem between the ECM and another module on the vehicle's network.

P1820: This code is related to the transmission range sensor circuit malfunction.

P1808: This code relates to the transmission 4-wheel drive (4WD) mode select switch circuit.

Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.
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Monday, July 10th, 2023 AT 10:47 AM
Tiny
ANDRIN ATEM
  • MEMBER
  • 186 POSTS
Thank you Ken, I let you know what I found.
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Monday, July 10th, 2023 AT 10:51 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,057 POSTS
Please do, have a great day.
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Tuesday, July 11th, 2023 AT 11:02 AM

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