Fault Codes Help !!!!
Thread Starter
AudiWorld Newcomer
Joined: Jan 2016
Posts: 4
Likes: 0
Fault Codes Help !!!!
I have a 2003 Audi A4 1.8 T Quattro
Pull into drive way CEL light was flashing , car had a miss fire . As all German cars I went to the coil packs. Scan codes and getting PO688
ECM/TCM power relay sense circuit . I got another ECM , plug into car and getting same fault code . The engine cranks over, checked and I have fuel pressure . Audi still wont crank . Any ideas or help would be help full.
Also this happen all at once , not a ongoing problem that I ignored .
Pull into drive way CEL light was flashing , car had a miss fire . As all German cars I went to the coil packs. Scan codes and getting PO688
ECM/TCM power relay sense circuit . I got another ECM , plug into car and getting same fault code . The engine cranks over, checked and I have fuel pressure . Audi still wont crank . Any ideas or help would be help full.
Also this happen all at once , not a ongoing problem that I ignored .
AudiWorld Super User
Joined: Feb 2010
Posts: 3,066
Likes: 37
From: Fort Worth, Tx
The fault code indicates more of a power issue to the ECM, not the ECM. I am helpless on power issues, but here is the ross tech troubleshooting guide. Need to do some research on the "relay 271".
17072/P0688/001672 - Ross-Tech Wiki
17072/P0688/001672 - Ross-Tech Wiki
Thread
Thread Starter
Forum
Replies
Last Post
rickyjlucas
A4 Cabriolet (B6 Platform) Discussion
1
Jul 7, 2016 05:49 AM
Fastscirocco
Audi Original "S" Cars
5
Feb 20, 2008 11:59 AM
jihax
12v V6 Discussion
1
Oct 15, 2006 08:04 PM
