I have the U1000 and U1001 codes on my 2005 Nissan Altima Sedan

Question

We have a 2005 Nissan Altima we have a crank no start, but we have fuel pressure and spark no injector pulse. Help

Answer 1

Hi there,

These codes typically mean there is a communication issue between modules. Sometimes it's just a bad ground either the negative battery cable or a problem with the ecm grounds on the dash support bracket. It will prevent the car from starting if the ecm isn't on.

Answer 2

U1000 NISSAN - CAN Communication Line - Signal Malfunction
Read more: https://www.autocodes.com/u1000_nissan.html

U1001 NISSAN - Invalid or Missing Data for Primary Id
Read more: https://www.autocodes.com/u1001_nissan.html