99 C5 A4 Engine shuts off while driving
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
You are getting body control codes--A door replacement could be the culprit as the elec. windows etc use the BCM--and you also are getting "Lost Communication codes" that indicate a shutdown of the entire BCM----looking fo arbad grounds is on the rite track-- i suspect the pass door is causing a major fault
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
You are getting body control codes--A door replacement could be the culprit as the elec. windows etc use the BCM--and you also are getting "Lost Communication codes" that indicate a shutdown of the entire BCM----looking fo arbad grounds is on the rite track-- i suspect the pass door is causing a major fault
EXCELLENT DIAGNOSIS! Pull the rubber accordion tube out of the door frame and door. Pull the connectors out of the door frame/ A piller. Seperate both connectors. Examine the FEMALE PINS. Look for pins that are spread apart. You can use a metal dental pick or a scribe and bend the little metal contact tong that makes connection with the male pins so its tight again.
This is a very common problem.
I would check BOTH doors !!
Bill
Racer
Joined: Nov 2009
Posts: 397
Likes: 35
mine just started doing this EXACT same thing last week, 3 times now so far since ! You guys saying this is a wiring issue in the "doors" or am i misunderstanding this ? I was wondering if it was electrical....should i grab a scanner and check for thrown codes then i guess almost 170,000 miles on the clock 
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
Yes, inside the accordian tubes that connect the doors to the rest of the car is a connector. One lead is NOT insulated right at the harness, if it grounds out, the BCM freaks out. Pull the accordian out from the A pillar and take a peek.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
There are NUMEROUS reasons your car can shut down on its own. Some of the most common reasons have been mentioned. The door wiring harnless issues stems form a POOR connection in the door harness electrical connectors. The bare wire is a speaker shield wire and although It can maybe cause an issue if it touches other wires, the most common problem is a damaged electrical connector FEMALE PINS.
They spread and loose connection. If the right wires make poor intermittent connections,, it caused errors on the serial data bus and the modules error out. Theres NOT one specific symptom but most of the times the door/s wont work and the dash lights and sometimes gages freak out.
Pop out the accordion tube, disconnect the two connectors in each door frame and examine EACH female pin. Look for damage corroded, bunt, spread pins. If there spread, use a pick and bend the little tong back up so the male pin makes better contact.
I test each pin with a spare male pin to make sue the female pins have the correct grip.
See if you can GUESS which pin is BAD in this picture?????
They spread and loose connection. If the right wires make poor intermittent connections,, it caused errors on the serial data bus and the modules error out. Theres NOT one specific symptom but most of the times the door/s wont work and the dash lights and sometimes gages freak out.
Pop out the accordion tube, disconnect the two connectors in each door frame and examine EACH female pin. Look for damage corroded, bunt, spread pins. If there spread, use a pick and bend the little tong back up so the male pin makes better contact.
I test each pin with a spare male pin to make sue the female pins have the correct grip.
See if you can GUESS which pin is BAD in this picture?????
1st Gear
Joined: Feb 2011
Posts: 1
Likes: 0
From: Louisville KY
Went looking on the forum because my 2001 C5 A4 turned off out of nowhere today while coming to a stop in Walmart's parking lot.
Car drove fine... no sounds, nothing. Just looking forward and "Check Gauges" light came on. Turned down the radio, and relaized car wasn't running and coasting to stop.
Put the car in Park... and it started right back up.
I came here to start trying to figure out what was going on so I went out just now to check my trouble codes.
LDCM
B2284H
U1064H
RDCM
U1064H
So... As soon as it's light outside tomorrow, I open the connector up and see whats going on.
Thanks for the help from everyone else.
You make owning GM products and their electrical issues a little less painful.
Car drove fine... no sounds, nothing. Just looking forward and "Check Gauges" light came on. Turned down the radio, and relaized car wasn't running and coasting to stop.
Put the car in Park... and it started right back up.
I came here to start trying to figure out what was going on so I went out just now to check my trouble codes.
LDCM
B2284H
U1064H
RDCM
U1064H
So... As soon as it's light outside tomorrow, I open the connector up and see whats going on.
Thanks for the help from everyone else.
You make owning GM products and their electrical issues a little less painful.
