Fuel injector codes P0201, P0203 and P0205?

MVANN74

MEMBER
2008 CHEVROLET MALIBU
3.6L
V6
2WD
AUTOMATIC
139,482 MILES

Hi. I have the car listed above LTZ model.
I have DTC codes p0201, p0203, and p0205 circuit open on those injectors. Also causing misfires in those cylinders. Funny thing is in under hood power distribution box fuse # 43 was blown. Inserted new fuse blown again. What could be causing the fuse to be blown and do I need to pull the intake manifold and trace the pink and black wires in harness to fuse box to find issue?

5 Replies

BORIS K

MECHANIC
762 POSTS

Hello,

Apart from injectors 1, 3, 5 fuse F43 also supplies ignition coils 1, 3, 5
Suggest to first disconnect the ignition coils and see if the fuse blows again.

The pink/black wire supplies each ignition coil on pin D.

Cheers, Boris

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Wednesday, February 28th, 2024 AT 6:23 AM

MVANN74

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65 POSTS

Thank you for responding. Unplugged coils, fuse still blows.

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Wednesday, February 28th, 2024 AT 1:51 PM

KEN L

MASTER CERTIFIED MECHANIC
42,940 POSTS

Now unplug the injectors 1, 3, 5 and replace the fuse, then plug the injector one at a time until the fuse blows, this will be the bad injector. Here is how to change the bad fuel injector out. Check out the images (below). Please let us know what happens.

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Thursday, February 29th, 2024 AT 3:58 PM

MVANN74

MEMBER
65 POSTS

Thank you for responding. Update, I ended up tracing all the pk/blk wires from injectors to fuse box. Heavily wrapped in loom and tape was a bundle of pk/blk wires. 4 of them were not quite melted but stuck together. I separated them, reinstalled fuse 33, turned on ignition and fuse didn't pop. It took about 10 hours over a 2day period, but the car runs fine at this time. Again, thank you for the help.

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Friday, March 1st, 2024 AT 2:43 AM

BORIS K