U1016-u1064-u1096 Codes ?
Thread Starter
Pro
Joined: Jan 2000
Posts: 652
Likes: 3
From: Salisbury MD.
U1016-u1064-u1096 Codes ?
U1016 loss of communications with PCM
U1064 ' ' ' ' BCM
U1096 ' ' ' ' IPC
These codes keep appearing. Does anyone have any suggestions where to start. I thought maybe grounds ? I would like to know if any one has had this problem if so what is the cure.
Thanks, Jim
U1064 ' ' ' ' BCM
U1096 ' ' ' ' IPC
These codes keep appearing. Does anyone have any suggestions where to start. I thought maybe grounds ? I would like to know if any one has had this problem if so what is the cure.
Thanks, Jim
Safety Car
Joined: Sep 2001
Posts: 4,411
Likes: 1
From: Wilmington NC
Originally Posted by C5-JIM
U1016 loss of communications with PCM
U1064 ' ' ' ' BCM
U1096 ' ' ' ' IPC
These codes keep appearing. Does anyone have any suggestions where to start. I thought maybe grounds ? I would like to know if any one has had this problem if so what is the cure.
Thanks, Jim
U1064 ' ' ' ' BCM
U1096 ' ' ' ' IPC
These codes keep appearing. Does anyone have any suggestions where to start. I thought maybe grounds ? I would like to know if any one has had this problem if so what is the cure.
Thanks, Jim
Burning Brakes
Joined: Feb 2000
Posts: 1,206
Likes: 0
From: USA USA
Cruise-In II Veteran
??
Would these false codes show up as NON-LOGGED data when doing a tune?? My tuner did not want to use his tune until this issue was not a prob. He was thinking my mass air was faulty. It is a 98.Not stealing the thread but i had these same codes after my attempt to tune w/HP tuner.
Matt
Matt
Racer
Joined: Sep 2004
Posts: 476
Likes: 2
From: Orange County Ca
same codes... 16,64,96
It might be the tires pres. sensors?
I changed my rims and did not change sensors over, my car also still runs like a bat outa h#ll.
I recently began having an issue with the prompt "service engine soon" and the TC and ABS are disabled.
Still researching that.
Good Luck
Jeff
I changed my rims and did not change sensors over, my car also still runs like a bat outa h#ll.
I recently began having an issue with the prompt "service engine soon" and the TC and ABS are disabled.
Still researching that.
Good Luck
Jeff
Racer
Joined: Mar 2003
Posts: 337
Likes: 3
From: Phoenix AZ
have the same thing on my 99FRC. It did happen EVERY time i drove the car, once first thing then two or three times during a drive. Did find a loose battery cable on the NEG (Exide Oribital) as the internal nut bottomed out and the cable never was snug. Replaced with red top (fresh battery) now have a tight connection on the NEG to the battery, and followed Bill Curleys advise on the grounds as far as locating, cleaning and coating with dielectric (sp?) grease. I have only had Service Vehicle Soon twice in about 50 runs this year. Do see "loss of communication" codes however nothing current, only history. So in the end, I have seen results on my car from securing, cleaning and coating the electrical points under the hood of the car.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Le Mans Master
Joined: Jul 2002
Posts: 7,370
Likes: 8
From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
It's common to all C5's, I don't know for a fact but if I were to guess then:
The computers on the C5 require a certain voltage to operate and if the voltage drops below a preset limit then it will tripper a loss of communication with the other modules, this drop in voltage happens when the car is started and the draw on the starter uses a large amount of amperage.
If your car is not experincing any messages like "service vehicle soon" and no warning lights are illuminating then disregard these codes.
The computers on the C5 require a certain voltage to operate and if the voltage drops below a preset limit then it will tripper a loss of communication with the other modules, this drop in voltage happens when the car is started and the draw on the starter uses a large amount of amperage.
If your car is not experincing any messages like "service vehicle soon" and no warning lights are illuminating then disregard these codes.
Burning Brakes
Joined: Feb 2000
Posts: 1,206
Likes: 0
From: USA USA
Cruise-In II Veteran
Safe To Tune??
So, I assume it is prob. safe to tune then?? I have no SES light or anything else. I cleared them the other day and it has not returned.I also removed 2 fuses relating to the comp. for about 5min. I think it was #23(10amp) and #26?(10amp). Drove just fine.
Matt
Matt
4th Gear
Joined: Sep 2018
Posts: 4
Likes: 0
99 C5 corvette U1016 Loss of Communications with PCM once I turn the key dash cluster blinks on and off for about five minutes then it will start but once I turn it off I have to go through the same steps - have cleaned three major ground connects under the hood - can anyone help
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,591
Likes: 4,055
From: Cape Coral, Florida
99 C5 corvette U1016 Loss of Communications with PCM once I turn the key dash cluster blinks on and off for about five minutes then it will start but once I turn it off I have to go through the same steps - have cleaned three major ground connects under the hood - can anyone help
Basically these "U" codes are "finger pointing" codes..."YOU,YOU,YOU !!...it is usually NOT the module that has the U code in it that is giving you the problem !!...your IPC and PCM aren't communicating !!
EDIT: BTW the ground for the IPC is NOT under the hood...on my 2001 the ground goes into a splice pack (SP208) which is on the R/H side of the IPC...that splice pack is then grounded at G104 which is on the R/H frame rail below the battery tray...there looks to be another ground which goes into SP201 which is on the IP harness and then it grounds to G201 which is about 13 inches from the HVAC control head connector !!.....AND GET YOUR BATTERY TESTED !!
Last edited by C5 Diag; Apr 19, 2019 at 12:26 PM.
