<DIV>My '03 Dmax has 5 codes P0201, P0204, P0206, P0207 and P2146. The first four seems to indicate "injector circuit malfunction" while the last one is unknown. The truck just barely runs (LIMP?), max. 2,000 RPM but did make it homehttp://www.dieselplace.com/forum/smileys/smiley4.gif though fuel gage showed empty. Reseting DTCs returns fuel gauge to pryor (1/4 tank) indication.</DIV>
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<DIV>Having 4 cylinders out leads me to suspect wiring but i'm not familiar with the layout nor any modules driving the injectors. GM recently replaced the ECM to fix an unrelated problem relating to the allison.</DIV>
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<DIV>Can you help me to shed some light on what might be causing these symptoms. Perhaps a block diagram or a link to one.</DIV>
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<DIV>Thank You Much for any help.</DIV>

1246 code means that there is a fault with the no 1, 4, 6 or 7 injector electrical circuit, which is what the P020X codes are..


Basically there is a fault in the wiring circuits of these injectors, between the PCM and the FICM or the FICM and the injector it self.