Fixed Chafed Wire In Harness At The Back Of Fuel Rail . Everything Was Fine . Drove It Home And Reduce Engine Speed Came On When I Got On It. The Fuse Did Not Blow . I Turned Car Off And Started It Back Up The Car Ran Fine Again But Check Engine Light Came On . Any Ideas On A Fix . Starting To Hate My Vert . Please Help

 

Help Anyone Please

 

Any codes?? Also look in the same area for other chaffed wires.

 

Dont Know How To Pull Codes

 

Shoot Bill Curlee a pm. He is a forum member and a highly regarded electrical Guru.

http://forums.corvetteforum.com/member.php?u=21968

 

These Are The Codes That Come Up In The Dtc Does Anyone Know What They Mean?

10pcm P1515h

28tcs C1278h

Aoldcm B2282h
Aoldcm B2284h
Aoldcm U1255h
Aoldcm U1064h
Aoldcm U1016h
Aoldcm U1096h

A1rdcm B2283h
A1rdcm B2285h
A1rdcm U1255h
A1rdcm U1064h
A1rdcm U1016h
A1rdcm U1096h

Borfa C2100h
Borfa C2105h
Borfa C2110h
Borfa C2115h
Borfa U1255h

 

Can Anyone Help Please

 

Now clear all those codes and see what returns. Just hit and hold the reset key on each code to clear it. A lot of those U codes may be from a low or dead battery at sometime in the past. Be sure you don't let the battery get low while trying to diagnose electrical problems, it will cause all kinds of false codes to be set and will drive you nuts! If you don't drive the car every day you may want to put a small battery maintainer on the battery just to be sure you don't let it get low and cause false codes. Check the codes as soon after you have a problem as you can, write them down and clear them so you can see which one are returning.

 

Those are history codes and not current. Meaning the problems are gone. If you have a reduce engine power message you should get some Pxxxx DTCs or Bxxxx DTCs depends on where the problem is/are. Reset them all and try to start the car again and check the codes again.

 

the new codes are p1516h

 

Here is the info

DTC P1516
Circuit Description
The predicted throttle position, based on the accelerator pedal position and possibly on other limiting factors, is compared to the actual throttle position. The 2 values should be within a calibrated range of each other. Both the powertrain control module (PCM) and the throttle actuator control (TAC) module redundantly monitor the predicted and the actual throttle position. This DTC sets if the TAC detects an out of range condition between the predicted and the actual throttle position.

Conditions for Running the DTC
DTC P1518 is not set.
The ignition switch is in the crank or the run position.
The ignition voltage is greater than 5.23 volts.
The TAC system is not in the battery saver mode.
Conditions for Setting the DTC
The TAC module detects that the predicted and actual throttle positions are not within a calibrated range of each other.
OR The PCM and the TAC cannot determine throttle position.
OR Both throttle position (TP) sensors are invalid
All of the above conditions are met for less than 1 second.
Action Taken When the DTC Sets
The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame and/or the Failure Records.
The control module commands the TAC system to operate in the Reduced Engine Power mode.
A message center or an indicator displays Reduced Engine Power.
Under certain conditions the control module commands the engine OFF.
Conditions for Clearing the MIL/DTC
The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
Clear the MIL and the DTC with a scan tool.
Diagnostic Aids
Inspect the TAC module connectors for signs of water intrusion. When water intrusion occurs, multiple DTCs could be set with no DTC circuit or component conditions found during diagnostic testing.
Ensure that the starting and charging systems are operating properly. Low system voltage can cause this DTC to set.
When the TAC module detects a condition within the TAC system, more than 1 TAC system related DTC may set. This is due to the many redundant tests that run continuously on this system. Locating and repairing 1 individual condition may correct more than 1 DTC. Disconnecting components during testing may set additional DTCs. Keep this in mind when reviewing the stored information, Capture info.
For an intermittent, refer to Intermittent Conditions .
Test Description
The numbers below refer to the step numbers on the diagnostic table.

If the TP Indicated angle does not follow the movement of the throttle blade, and no TP Sensor DTCs are set, there is a mechanical condition with the throttle shaft or the TP sensor.

When the TAC module detects a condition within the TAC system, more than 1 TAC system related DTC may set. This is due to the many redundant tests that run continuously on this system. Locating and repairing 1 individual condition may correct more than 1 DTC. Disconnecting components during testing may set additional DTCs. Keep this in mind when reviewing the stored information, Capture info.

 

Not Too Sure What All This Means . But I Went Out Too The Car Tonight And Cleared All The Codes . After That I Started The Car And Car Ran Fine The Minute I Accelorated . The Car Read Reduce Engine Speed . So I Detirmined That It Only Does This On Cold Start I Think !!!! I Checked For Codes And This One Popped Up P1515h What Do You Think

 

The DTC indicates that you have some intermittent problem with the TAC module or related components. The above description is the guide for trouble shooting the TAC module right out of the C5 service manual.
GL

 

If you repaired the wire that is the problem, The wires have to be repaired with care or it will not work. Check your repair make sure that it is clean and that you use a good contection on the repair. Then use good tape so the you get no bleed through of volts, through the taped area. I have had this problem and as soon as i repaired the wire like the service manual showed it work fine! Good luck!

 

I Think The Repair I Made On The Wires Was Pretty Good . I Took The Air Intake Tube Off Today And Moved The Throttle Plate Back And Forth Tonight . I Also Noticed That I Had One Of Those Foil To Make The Air Flow Smother . I Removed It Put It Back Together . Cleared Codes And Took It For A Ride And It Seemed To Run Fine . Going Too Keep My Fingers Crossed .

Do You Guys Think That Any Of This Stuff Could Be The Problem Now ?