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Hello and thanks for helping!
2002 Z06. I have these three codes and I am struggling with finding the issue. I replaced the O2 sensor. I replaced the burnt sockets on the DRL's. Engine stays in open loop and the dash light flicker unless the relay (do not remember which of the 2 relays I pulled) is pulled, then no front turn signals.
I suspect these are related and there is a short to ground. Can someone suggest the most probably location to begin my search? I do not have access to a lift. I struggle with electrical issues to begin with, but I do have a good DMM and can halfway use it...HAHA. I do have shop manuals.
Thanks for any help you can offer.
Jimmy Carter
Last edited by goatkeeper; Feb 3, 2026 at 10:38 AM.
Reason: misspelled word
If you have the shop manuals have you followed the flow charts ???...if you didn't all 3 DTC's are below...take your car to an auto electric shop if you are weak in electrical.unfortunately we can't diagnose this for you.
Thanks for replying. The manual explains the procedure, but in this case without a Tech 2 it is no help.
When you choose to live in a rural area, as we do, the options are limited. I'd have to trailer my car an hour and half to a town large enough which might have a component electrical automotive shop.
I've learned in the past, often times forums are a wealth of information. By posting, I hope someone might have had a similar issue and would be willing to share their experiences.
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Code help B0502, B0507 and P1153 only codes
