[Z06] Please help me with DTC codes....

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Mar 9, 2006 | 08:58 PM

'04 Z06 Rocket

Thread Starter

Racer

Joined: Jan 2006

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Please help me with DTC codes....

Please help me with DTC codes.... P0171, B0502, P0174, B0507, B2482. I got these codes from the screen of a Hypertec programmer I was trying to install in my Z06 today.

I also got a strange message in the DIC saying "Reduced engine power" while I was trying to install the program. I don't know why that message was on there because I just drove it around town a bit to get a feel for the car before I put the programmer in and drove it again. I did do some spirited driving but nothing extreme I thought. I planned to see if I could feel a diference in the seat before and after.

Any help would be appreciated as I'm a new C5 Z06 owner and did not have these problems in a C4 I recently sold.

Mar 9, 2006 | 09:12 PM

PhatZO6

Instructor

Joined: Jun 2005

Posts: 204

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From: Eagle ID

P0171-Fuel Trim System LeanBank 1
B0502-RT DRL Relay Circuit
P0174-Fuel Trim System Lean Bank 2
B0507-LT DRL Relay Circuit
B2482-Back-Up Lamp Relay Circuit

Mar 9, 2006 | 09:20 PM

Andy64

Racer

Joined: Jul 2004

Posts: 438

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From: Nesconset (LI) NY

The C5 Tech Tips from this forum has lots of good info. Here is a link to a document with many codes that you can download:

https://www.corvetteforum.com/techti...D=26&TopicID=1

Hopefully this helps some, I'm sure many others more mechanically knowledgeable will provide additional insight into what your specific issues may be.

Mar 9, 2006 | 09:36 PM

'04 Z06 Rocket

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Racer

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Quote:

Originally Posted by PhatZO6

P0171-Fuel Trim System LeanBank 1
B0502-RT DRL Relay Circuit
P0174-Fuel Trim System Lean Bank 2
B0507-LT DRL Relay Circuit
B2482-Back-Up Lamp Relay Circuit

Ok, I pulled the #2 fuse a while back to eliminate the DRL's, so I realize that the DRL relay circuit is the reason for the 3 codes involving the back up lamps etc. What does the Fuel system Lean Bank 1 & 2 mean? I just bought the car and it has an aftermarket Y shaped filter in place of the stock original down between the headlights in front of the radiator. I looks similiar to a K&N or something like that. Could that be the Lean reason? Too much air to fuel? Ive heard of that problem before on here with some converstaions.

Thanks, and I really appreciate the fast responses and help I get on this great Forum.

Mar 9, 2006 | 09:37 PM

'04 Z06 Rocket

Thread Starter

Racer

Joined: Jan 2006

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Quote:

Originally Posted by Andy64

Thank you for this link too!

Dang its got alot of good info in the link document!

Last edited by '04 Z06 Rocket; Mar 9, 2006 at 09:40 PM.

Mar 10, 2006 | 07:09 AM

Twil1ght

Drifting

Joined: Jun 2004

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From: Las Vegas NV

Reduced engine power is a normal message during programming.

Mar 10, 2006 | 10:10 AM

MVR 155

Safety Car

Joined: Mar 2000

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From: Bartlett, IL

Cruise-In XI Veteran

St. Jude Donor '06-'07-'08-'09-'10-'11-'12

Quote:

Originally Posted by '04 Z06 Rocket

You will see that alot of owners get a lean fuel bank code after the install of a aftermarket filter/intake, tuning will remedy this issue, before tuning I used to get it from the intall of my blackwing intake.

Mar 10, 2006 | 11:59 AM

RussBt

Le Mans Master

Joined: Jun 2001

Posts: 7,331

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From: Admit Nothing, Deny Everything, Make Counter Accusations.

Quote:

Originally Posted by '04 Z06 Rocket

I just bought the car and it has an aftermarket Y shaped filter in place of the stock original down between the headlights in front of the radiator. I looks similiar to a K&N or something like that. Could that be the Lean reason? Too much air to fuel?

The filter is the problem but too much air to fuel is not the cause. The codes are caused by inaccurate MAF readings due to turbulence. The easiest and cheapest solution is to put the stock airbox back on.