I have been getting this code every once in awhile. I am just trying to figure it out before my car gets turboed. Anyone got ideas what the problem could be???

Corey

 

The first thing to check is fuel presure. Is it within spec?

 

I was a bit broad on the first post. Here is my Fuel Setup. Jackson In-tank Fuel Pump, AEM FPR, AEM Rail, V-AFC, and Gauge. My fuel is set at 55psi at idle. Spec is 47-52 i am pretty sure. I have a 94 B18c1... Anyone???

 

99.9% of the time code 43 is a faulty O2 sensor. Replace it and the problem should go away after you reset your ECU.

Later,
BR