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Have code C0040

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Old May 14, 2025 | 05:42 PM
  #1  
PAULHHRHELP's Avatar
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Joined: 05-14-2025
Posts: 4
From: Missouri
Have code C0040

Originally Posted by Oldblue
Check the wiring connections for corrosion or damage, Replace both front hubs not just one!

https://www.engine-codes.com/c0040_chevrolet.html
So is just had both front hub assemblys replaced on my car and it's still giving me that same code after replacing them. Any help would be greatlyappreciated!!!
Old May 15, 2025 | 06:40 AM
  #2  
PulpFriction's Avatar
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Joined: 12-05-2014
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From: Northern Ohio
Originally Posted by PAULHHRHELP
So is just had both front hub assemblys replaced on my car and it's still giving me that same code after replacing them. Any help would be greatlyappreciated!!!
What was your issue? If it was P0035/40/45/50, it is probably a bad wire or connector. Always check those first. These cars are old. The wiring insulation can look fine in the outside and be corroded and/or broken on the inside. That might mean continuity/resistance checks on every every wire.
Old May 15, 2025 | 06:44 AM
  #3  
PAULHHRHELP's Avatar
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Joined: 05-14-2025
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From: Missouri
PulpFriction,

Thank you so much for your help! I will have it checked! I am not a mechanic by any means lol.
Old May 15, 2025 | 06:44 AM
  #4  
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From: Welland,Ont Canada
I had this code a year or two ago, it was the hub, and the replacement hub was faulty. The harness from body to hub is obsolete, you will have to replace the wires
Old May 15, 2025 | 06:45 AM
  #5  
PAULHHRHELP's Avatar
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Joined: 05-14-2025
Posts: 4
From: Missouri
Originally Posted by Oldblue
I had this code a year or two ago, it was the hub, and the replacement hub was faulty. The harness from body to hub is obsolete, you will have to replace the wires
Thank you for the information!!
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