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sprinkles08, ASE Certified Technician
Category: Chevy
Satisfied Customers: 22646
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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Um code for evap. A code for fuel pump. Not communicating

Customer Question

Um code for evap. A code for fuel pump. Not communicating with control module and a code for bank 1 & 2 being. Too rich.
JA: Have you ever replaced the fuel pump, or is this the original?
Customer: Guessing a original ive has it since december last yr
JA: What is the model/year of your Chevy?
Customer: Also has a clicking sound i suspect to be a leaking/cracked exhaust manifold. Its is a 2007 silverado k1500 work truck
JA: Are you fixing your Silverado yourself? What have you tried so far?
Customer: Yes or maybe a little help but mechanics are expensive. And ive only started to do research.
JA: Anything else you want the mechanic to know before I connect you?
Customer: Thats pretty much it i believe
Submitted: 9 months ago.
Category: Chevy
Customer: replied 9 months ago.
5.3ltr engine 4x4 and extended cab. Automatic.
Expert:  sprinkles08 replied 9 months ago.

Hello and welcome to JustAnswer!

If you do have an exhaust leak at the manifolds or collectors it can draw oxygen into the exhaust stream through venturi effect and could be the cause of the fuel system rich codes.

Do you have the actual P code numbers that are currently setting?

Customer: replied 9 months ago.
I do not i can get them again this evening. I just new it was four codes. Evap. System rich bank 1 and system rich bank 2 and the fuel pump not communicating with control module.
Expert:  sprinkles08 replied 9 months ago.

If you can let me know exactly what codes are setting we can take it from there.

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