P0206 P0207 but why!? - Chevy and GMC Duramax Diesel Forum
06-07 LBZ & LLY Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

 
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post #1 of 4 (permalink) Old 01-21-2020, 04:00 PM Thread Starter
 
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P0206 P0207 but why!?

2006 regular cab LBZ . So I was plowing this weekend and I pushed up to the bank and the truck gave a shutter. I backed up then it was misfiring threw two codes p0206 and p0207 which I know is low voltage on 6+7 injectors but I can clear it and truck will idle fine when I go to give it fuel it’ll get up a little over 1000 rpm and engine light comes back on and shutter and misfire occur. What could it be? I don’t think it’s injectors cause if I clear the code it will idle normal and run smooth and two injectors going bad at the same time doesn’t seem right. Could it be chafed wires? Or maybe a bad ECM? Anyone else run into something like this? Thanks!
-Luke
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post #2 of 4 (permalink) Old 01-21-2020, 07:35 PM
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Have you looked at the connectors on the two injectors? Often times low voltage is either a chaffed wire (could be at injector or ECM) or a bad connection at the injector.

try removing removing the connectors, cleaning the contacts on both the connector and the injector and use a bit of Di-electric grease when putting them back on.

2008 Silverado 2500HD CCSB LTZ Diesel
FASS 95 Lift Pump (with Baldwin filters), Edge Insight CTS Monitor on a Windshield Mount, Nicktane Fuel Filter Adapter w/ CAT 306-9199 UHE tertiary fuel filter, Bilstein 5100 Stock Height, Bushwacker Bed Rail Caps, AMP Research Bedstep, Fumoto oil drain valve, Dorman PS Oil cooler, Pioneer AVIC 7200NEX GPS/Stereo, Air Lift LoadLifter 5000 Air Bags.
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post #3 of 4 (permalink) Old 01-22-2020, 02:59 PM Thread Starter
 
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If was chaffed wires right off main harness plug every time I read that the motor would move and it was short out on the harness tie down. All fixed runs great
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post #4 of 4 (permalink) Old 01-24-2020, 12:12 PM
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Thanks for the update.

2001 2500HD 4WD EXTENDED CAB LS,
S&B CAI, 4" STAINLESS STEEL EXHAUST, EFI LIVE FROM ATP TRUCKS, EDGE CTS, PPE BOOST VALVE, BANKS INTERCOOLER PIPE, AIR DOG II 165, REBUILT TRANNY WITH SUNCOAST KIT, TRANSGO SHIFTKIT AND BILLIT TORQUE CONVERTER, NEW UPGRADED TAILSHAFT, PUMP RUB FIX ON TRANSFER WITH NEW ALUMINUM TAIL SHAFT, NEW TOW MIRRORS, NEW GAGE HEAVY DUTY FRONT AND REAR BUMPERS, BEANS SUMP, FUMOTO VALVE, RARE PARTS TIE RODS WITH COGNITO PISK, MAD JACK FUEL FILTER ACCESS DOOR, STAINLESS STEEL SPEED BLEEDERS.
2011 GMC 3500HD DUALLY Welding Bed, 4WD CREW CAB, 4" downpipe back exhaust, def delete, egr delete, with new LB7 up pipe, pcv reroute, Fass 150, EFI live with DSP 5, HSP CAI. Air Lift Air bags. PPEI transmission tune.
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