sportmann85
New member
Just bought my 2006 Grand Prix GXP. Cars been throwing a p0340 code since I bought it. DTC code indicates that the ECM is not seeing the reference signal from cam sensor. Replaced sensor to no avail. Checked wire harness connector for 12v reference high on the red wire and low reference on the pink/black. Both check out. I bench tested the hall effect cam sensor to be sure I didn't get a bad new sensor. Chancer appears to check out. I can really use a schematic that shows the pin out on the ECM for the switching wire. Unless someone's got some advice. Thanks