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Check Engine Codes

Ajnthony

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Ajnthony Enthusiast

Ajnthony

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Posted

So I installed a bull bar with a led light bar last weekend and all seemed to go well until my check engine light came on the next day.  The codes that come back are U1345 and U01B0. I tried clearing them but they came back.  Any ideas on what these two codes are and how to fix the problem? Any help is much appreciated. Thanks. 

 

 

 

 

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davester Senior Enthusiast

davester

Posted
Posted

I would look at the wiring you did, and the wiring around it, that you may have moved, maybe you hooked up to the wrong wires, or worked some connector loose, or something along those lines.

Rocz3cqg Enthusiast

Rocz3cqg

Posted
Posted

U1345 could be Fuel and Air Metering, Fuel Rail Pressure Sensor Circuit Malfunction, Engine Shutoff Solenoid Malfunction or Shift / Timing Solenoid Malfunction / 3-2 Shift Solenoid Circuit Electrical. U01B0  might be Lost Communication  with Battery Monitor Module. I am with DaveSter, check the wiring and for any plugs that are loose.

Ajnthony Enthusiast

Ajnthony

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Thanks for the suggestions. I should have mentioned this is a 2019 Silverado 1500 trail boss. It may have something do with the fact I don’t know how to reinstall this wiring harnesses see photos. 

52695D3F-6CA1-464B-91C4-B3C83CE25CAC.jpeg

Ajnthony Enthusiast

Ajnthony

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1 hour ago, Rocz3cqg said:

So no plug found to connect or you forgot to connect?

I need a photo of under the glove box of a 2019 Silverado to remember how to but this Electronic piece back. It’s plugged in but just dangling at the moment until I figure how to but it back into its lance correctly. Unlikely this is the cause of the check engine light though. But I am backwards mapping to try to locate the problem. This is next on the list. 

  • 5 months later...
grrr027 Enthusiast

grrr027

Posted
Posted

@Ajnthony any update on these codes? I have a Sierra with 1300 miles and got the same two codes after installing a leveling kit.

Ajnthony Enthusiast

Ajnthony

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5 minutes ago, grrr027 said:

@Ajnthony any update on these codes? I have a Sierra with 1300 miles and got the same two codes after installing a leveling kit.

Yes. I finally took the truck into the shop for the recalls. Asked them to check on the check engine light and codes. They cleared it and said it was a lost signal with the battery. Nothing major but they had to reprogram and reset I guess.  All good now and they didn't charge me anything. Hope this helps. 

grrr027 Enthusiast

grrr027

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4 minutes ago, Ajnthony said:

Yes. I finally took the truck into the shop for the recalls. Asked them to check on the check engine light and codes. They cleared it and said it was a lost signal with the battery. Nothing major but they had to reprogram and reset I guess.  All good now and they didn't charge me anything. Hope this helps. 

Yes, that helps a ton, thank you! I’ll call the dealer today.

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