code p0201, p0204, p0206, p0207??? - Chevy and GMC Duramax Diesel Forum
01-04.5 LB7 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 Ect

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Old 10-11-2011, 06:47 PM   eBay Motors  #1 (permalink)
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code p0201, p0204, p0206, p0207???

i know the codes say injector circuit open, but what does that mean? also code p1261 come up it is manufacturer fuel metering. thanks for any help
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Old 10-11-2011, 07:20 PM   eBay Motors  #2 (permalink)
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Please fill out your signature-- [top "User CP'] We don't know what you drive-!

There are several problems with each series engine-- We can help!

4.5/05 [LLY] had injector connector problems-- a quick stab with a sharp ice pick would make it like new. Free!
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Old 10-11-2011, 07:27 PM   eBay Motors  #3 (permalink)
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Just updated it.. It is a 2002
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Old 10-11-2011, 07:57 PM   eBay Motors  #4 (permalink)
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Someone will chime in here-- lots of guys have LB7 engines.

Have you had a recent injector work-? a loose connector or a shorted injector wire will cause problems.

Good Luck
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Chevy 04.5 LLY, 2X, shell, XDR, MikeL Heavy duty up-grade, 6spd, TransGo, deep pan, de-badged, 65 Gallon replacement Aero tank, LBZ-mp, Kennedy pump, shimmed, Pre-fuel filter, tow mirrors, BU cam, gauges, GPS, Sirius, bags, custom grille, fender vents, HD trans cooler- Curt front hitch, footwell lights, load lights, Studs, head gaskets.--- Jerry
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Old 10-11-2011, 08:17 PM   eBay Motors  #5 (permalink)
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yea just replaced the injectors a week ago and been having problems ever sence. first it was air in the system and found a pin hole in the fuel line fixed that, then found a pinched o-ring on one of the injectors. when we got it back together it idled real smooth but going down the road the motor was just noisier than before. tonight i unplugged the programmer(banks 6 gun) and drove it. seem to run and shift smoother but the more i drove it the noisier it got(or atleast it seems that way). well on the way home i put it to the floor and it ran up and didn't shift for a few seconds and the went into limp mode with the service engine soon light on. check the codes and that is what come up. when i pulled up to the house it sounded like it was only running on about 4 cylinders. my question is could it be the connections still? thanks
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Old 10-11-2011, 09:50 PM   eBay Motors  #6 (permalink)
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On the LLY engine-- when a injector looses contact, it will go into "Limp" and and set codes. Just like you have-- The Power control module will sense the problem and include all injectors in group A, or group B, what ever the bad injector is on. It will be on 4 cylinders -- runs-- although not very well, and noisy. The RPM will be limited to 2,000 RPM.

Your problem might be a loose connection, or a bad injector. It will have to go back to the shop that did the injectors. A injector balance test may locate the problem.

Good Luck.
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Old 10-12-2011, 07:01 PM   eBay Motors  #7 (permalink)
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It is going in the shop tomorrow. Thanks for the help.
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