C1921 U1000 code infiniti

Question

Infinity G37 2011 v6
code C1921 U1000
complain was misfires sometimes
but now not start the engine

Answer 1

Infiniti cars that has the U1000 the first thing to do is lossen all the ground connecters clean them with sand paper on the connector and body and retighen the bolts back. 

 

Fix the U1000 code first, C1921 is for the Rear Wheel Active Steering

 

 

 

There will be a few by the engine bay and will look like this lossen all the ground connecters clean them with sand paper on the connector and body and retighen the bolts back 

 

 

 

here is the service bulletin from Infiniti

 

https://www.autocodes.com/uploads/ITB06-004a.pdf

 

and another one 

 

http://www.infinitig37.com/TSB/1SW34.pdf

 

 

 

 

You can also add a grounding kit to help the factory grounds since the factory grounds are thin and can lose connecting since you can rust and or have corrosion.