Okay so I was driving to the gas station(99 6sp FRC 54000miles) and all of a sudden the car slowed down like the brakes came on and I got "service active handling" and "service vehicle soon" on the display. got gas, cleared the messages and drove off. Few minutes later while getting on the freeway same thing happens.
So I get home and I check the codes.
IPC B0516H
TCS C1281H
TCS C1287H

RFA U1096H
RFA U1064H
RFA U1016H

I looked them up in the other post i saw on here, so i know what the are for, but now what do I do about them? Any ideas? Thanks

 

Anybody? I cleared the codes and went for a drive and up popped the same message but this time I only had the 3 RFA codes and the TCS C1287 code. Anywhere specific I should start looking for issues? Thanks,

 

The RFA U codes are intermittent communication interuptions that do not necessarily mean anything. They happen on all C5s most of the time.

The two C128X codes indicate there could be a problem with the steering sensor. Do you have active handling? Other modules that could be causing the problem are the yaw rate sensor or the EBTCM.

None of these codes should have slowed the car. Although if you were in an Active Handling situation where AH applies a single brake the two C128x codes could have occurred during that instance.

Bill

 

Thanks for the info. Yes, my car has active handling, forgot to mention that. I was still able to turn AH off and on after I got the codes. That doesnt mean it was working of course. When the brake or brakes activated without my pushing on the pedal I was only going about 5mph pulling into a gas stationn from a stop sign. So I don't see how active handling would have come into affect in that situation. Thanks again for the help. Anyone else have ideas?

 

Interesting, the IPC code B0516 indicates the PCM told the IPC that the vehicle exceeded 200 mph, here's what the book says;

Circuit Description
The Instrument Panel Cluster (IPC) receives vehicle speed information from the Powertrain Control Module (PCM). The IPC receives a 4000 pulse-per mile Vehicle Speed Sensor (VSS) input over a dedicated input from the PCM. The PCM is responsible for processing the VSS data and sending it to the IPC. The IPC will only display the calculated VSS data that was sent from the PCM. The IPC monitors the VSS output information sent from the PCM for an out of range condition.

Conditions for Setting the DTC
The IPC detects vehicle speed information sent from the PCM over 322 km/h (200 mph) on CKT 817.
Condition must be present for 1 second.

Action Taken When the DTC Sets
Stores a DTC B0516 in the IPC memory.
The IPC will display vehicle speed at 322 km/h (200 mph).
No driver warning message will be displayed for this DTC.

Conditions for Clearing the DTC
The IPC detects vehicle speed information sent from the PCM less than 322 km/h (200 mph) on CKT 817.
A history DTC will clear after 50 consecutive ignition cycles if the condition for the malfunction is no longer present.
Use the IPC clear DTC feature.
Use a scan tool.

Diagnostic Aids
The following conditions may cause an intermittent malfunction to occur:
The PCM is unable to process the correct vehicle speed data sent from the VSS.
Intermittent or erratic VSS operation.
Test drive the vehicle and check for proper speedometer operation. If the IPC is unable to display the proper vehicle speed information, use a scan tool to display the PCM VSS data. If the PCM is not receiving the proper information from the VSS circuit, then the PCM and VSS circuit must be diagnosed first before diagnosing a DTC B0516.
Always check for proper speedometer circuit operation by displaying PCM vehicle speed data and checking for stored VSS DTCs with a scan tool before attempting to diagnose a DTC B0516.
If the DTC is a history DTC, the problem may be intermittent. Perform the tests shown while moving related wiring and connectors. This can often cause the malfunction to occur.

The only thing I can think of is that the PCM thinks the car was exceeding 200 mph versus just a VSS glitch as indicated by the maintenance manual.

 

how do you check the code on your car? sorry, I'd help but unfortunately I don't know what to do

 

The "diagnostic display" mode is entered with the following procedure:
1) Turn on the ignition but don't start the engine.
2) Press the "reset" button to turn off any warning messages
3) Press and hold "options" , press "fuel" four times within a 10-second period.

When first engaged the on-board diagnostics go into an "automatic" mode.

The computer will show two kinds of codes, "current" and "history," designated "C" or "H". A current code indicates a malfunction is present in the system whose module is displaying data. A history code indicates a past problem.

When the screen displays "manual diagnostics," select the desired module by pressing the "options" button to go forward or the "trip" button to go back. Press "gages" to go forward or "fuel" to go back for each code under a module.

To exit the diagnostic mode at any time, press "E/M". If you want to erase or "clear" codes, press, "reset."

 

Mine went crazy and I had to replace the computer.....

 

Hi kingrobby25 -

Sounds like a battery going south.

Best regards -

mqqn

 

Funny you mentioned the battery. My optima red top crapped out about 2 months ago, replaced it with another one, and it was running fine before I left for this last trip. Been gone about a month then come back to these problems. ALthough, today I havent had any issues so far.

 

This is the absolute best C5 Diagnostic Trouble Code (DTC) web site!!!

http://www.corvettedoctor.com/Code_Main.html
http://www.corvettedoctor.com/index.html


Go to “technical data base” and then to “Corvette ECM Computer Codes”. Then select your year car. Read the instructions and then scroll down to the "READ MORE" window to view the code definitions.\

Here is another very good site:

http://www.obd-codes.com/trouble_cod...d-ii-codes.php

Make sure to include the H or C suffix!!


Write down and post your DTC’s Then clear them ALL!

Sound effects are cool too! 

 

That sounds like the TC activated. If you ran over a bump in the road or the gutter at the gas station entrance the TC could activate. At low speeds it applies the brakes and sometimes cuts power to control what it thinks is wheel spin although all that happened was a quick rear wheel acceleration on one of the rear wheels when it went over the bump and maybe the other wheel hadn't hit the bump yet.

Bill