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m73blazer 4/24/2011

2004 Chevrolet C4500 Kodiak C4E042 8 Cyl 6.6L


What is the problem when I get codes po202 and p2149 and the rpms wont go over 2000

When I take out the relays and put them back in sometimes its ok for just a minute, also why would the pressure bleed off after pumping the fuel primer on top of the fuel filter, is that a bad injector?

1 Answer


HouseCallAuto 4/25/2011

1. Inspect for wire harness chafes on the Fuel Injection Control Module (FICM) wiring harness retaining bracket and at the alternator.

2. Clear trouble codes then wiggle test the related injector connectors to see if the trouble codes can be repeated.

3. If the harness checks OK, replace the affected injector connector pigtail per bulletin.

4. See TSB's #09-06-04-034, #05-06-04-047C, #06-06-04-026A, #3238E for more detail regarding fuel injector harness chafing and injector pigtail repairs.

5. You can stop at a Chevy dealer parts dept and ask them to print out the TSB's or you can try to Google each TSB # and you may find them on the internet, usually in a PDF file.

Potential Causes:
#2 Fuel Injector Wiring
Fuel Injector Connector

See TSB: #09-06-04-034, #05-06-04-047C, #06-06-04-026A. NOTE: Cylinders #1, 3, 5, 7 are on the Right Hand (RH) side of the block and #2, 4, 6, 8 are on the Left Hand (LH) side of block.


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