How to Decipher Codes??????

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Aug 28, 2022 | 06:30 PM

57gman

Thread Starter

Burning Brakes

Joined: Aug 2013

Posts: 948

Likes: 100

From: Lehigh Valley PA

2022 C5 of the Year Finalist - Modified

How to Decipher Codes??????

I pulled my codes but how can I tell what they mean? All are history codes though, they are:

B2721
B2282
B2283
B2284
P1631
U1016
U1064

Appreciate any help!

Aug 28, 2022 | 06:33 PM

Supercharged111

Safety Car

Joined: Jan 2012

Posts: 3,953

Likes: 520

From: Da U.P.

Google them. If they're all historic you probably had a blip in the electrical system. I'd Google that P code first as it's a power train code. The B are BCM codes. I think U is bus/comm stuff.

Aug 28, 2022 | 07:19 PM

Smoken1

Joined: Apr 2013

Posts: 5,010

Likes: 1,143

From: Oregon

St. Jude Donor '14-'15-'16-'17-'18-'19-'20-'21-'22-'23

Quote:

Originally Posted by 57gman

I pulled my codes but how can I tell what they mean? All are history codes though, they are:

B2721
B2282
B2283
B2284
P1631
U1016
U1064

Appreciate any help!

This should help

Attached Images

C5 DTC Codes.pdf (1,000.3 KB, 193 views)

Aug 28, 2022 | 08:47 PM

57gman

Thread Starter

Burning Brakes

Joined: Aug 2013

Posts: 948

Likes: 100

From: Lehigh Valley PA

2022 C5 of the Year Finalist - Modified

Quote:

Originally Posted by Smoken1

This should help

Wow, this link was spot on!!!! THANK YOU. I pulled up all the codes I had, This list should be shared somewhere on the C5 site. Now the big question is what do you do knowing the codes and the issues I'm experiencing? look for new thread!

Aug 28, 2022 | 08:50 PM

57gman

Thread Starter

Burning Brakes

Joined: Aug 2013

Posts: 948

Likes: 100

From: Lehigh Valley PA

2022 C5 of the Year Finalist - Modified

Thank you! The P1631 code is Theft Deterrent start enable signal is not correct......

Aug 30, 2022 | 02:12 AM

vette4fl

Le Mans Master

Joined: Feb 2021

Posts: 6,405

Likes: 4,239

From: Florida

2025 Corvette of the Year Finalist - Unmodified

2024 C5 of the Year Winner- Unmodified

2022 C5 of the Year Finalist - Unmodified

Might want to go through the code clearing process, drive for a few days, and then check again. Sometimes they reappear, sometimes not.

Aug 30, 2022 | 09:59 AM

Supercharged111

Safety Car

Joined: Jan 2012

Posts: 3,953

Likes: 520

From: Da U.P.

Quote:

Originally Posted by 57gman

Thank you! The P1631 code is Theft Deterrent start enable signal is not correct......

How is it not correct?

Aug 30, 2022 | 07:06 PM

C5 Diag

Moderator, Tech Contributor

Joined: Sep 2013

Posts: 15,319

Likes: 3,927

From: Cape Coral, Florida

Quote:

Originally Posted by Supercharged111

How is it not correct?

This basically means the PCM is not seeing the right "password" from the BCM (through the ignition key) to enable the start signal to allow the fuel pump to run to make the car start...also the theft deterrent relay will energize and allow the starter to operate...is this what you are asking ???