Nissan Repair: 2002 Altima service engine light, autozone, 2002 altima

Question
Hi. Went to Autozone as you requested for code. Two codes were  given but they could not tell me what they meant. U1000 and U1001. Can you tell me what that is?

Answer
John,

Go to a different Autozone since the code reader they used did not link to your car.  The codes mean that there was no communication between your car and their reader.  It does happen from time to time and some generic readers will not read you car and some will.  Email me back when they can read the codes.