Can you shed some light and share the repair for the DIC displaying
"reduced engine power". Do I have to tow it to the dealer or is it a home fix. Thanks!

 

unhook the battery for about 30 min's then hook it back up. There is a way from the reset buttom but I don't have it with me at the moment that only takes a few seconds... Robert

 

There is a section in the Owner's Manual about this - check in the DIC Warnings and Messages part for more info. It says you can drive the car when the message pops up, but you really need to know what is causing the message to appear. If it were my car, I would have it checked out. You can also pull any codes on the DIC, post them up here, and someone should be able to tell you what might be causing the warning.

 

Pull and post the codes. Can be many things causing it. Just had to fix this on my Wife's Pontiac. Gas pedal has 2 sensors on her car, they have to match readings by 5% or the engine control puts the car into reduced power mode. This is only one possibility, I hooked up mu Actron, pulled the codes and then graphed the 2 sensors while I drove it around. $65 for a new gas pedal and all is well again. Vette can do go into reduced power for many reasons-PULL THE CODES!

 

That happened to me once. My manual said to change the type of gas I was using, I did and have not had that problem again. I was using sunoco, haven't used it since. Don't know why it did not like it

 

Thanks for the quick responses. My son just filled the car with gas when this happened. I am trying to get a hold of him now to tell him to disconnect the battery for a while. He said there wasn't a numerical code that displayed and he doesn't have the machine to get them out of the car. Hopefully disconnecting the battery will solve this problem. Thanks again!

 

Using the reset button on the dash clear all messages. Next, hold the options button and press the fuel button 4 times. This will bring up the auto dic code reader. It will go through all the modules in auto, and show what code are present. Then it will go into manual, where you can scroll through the modules using the gauge and trip buttons, I think, possibly the options button. Anyway, he will figure that out. Write the codes down. You can clear the codes by holding the reset button, for each code after writing it down. You should do this with the car running so it will show if the error is current "C" or historic "H" after the numeric code. Be sure to get the letter designator prefix also. You exit the dic by hitting the E/M button. Once you have cleared the codes the car should run normal again, unless the problem is still present, or it happens again. Post the codes in the tech forum under the thread "important electrical information" Ask for help and someone there will help. Bill Curley is amazing and he monitors that thread pretty closely. I would stay away from the dealer if at all possible. I had a similar problem that turned out to be faulty wiring. I doubt it is the gas though, more likely a glitch than bad gas. Good luck

 

If he has disconnected the battery, there will be many codes, and you will be hard pressed to figure out which ones were the original problem.

 

With mine you just pull the key, wait 10 seconds and restart. It resets.

 

Sunoco is crap gas Frank, I quit using it years ago. My wife and I noticed the gas mileage that we got every time we used Sunoco was terrible in all of our vehicles . This was over a period of time so it just wasn't a bad batch of gas.

 

Codes List:
http://www.stengel.net/diccodes.htm

How to pull codes:


Please get back to us on the ACTUAL codes so we can FIND the problem causing the "REDUCED ENGINE POWER" - there is a reason!

Thanks,Matt

 

I will get the codes and post them, but I did return to the tuner. He changed some parameters associated with how the density is handled and he thought that would do it. Wrong!! on the way home I ran it up to just under 5,000 and the same thing. I re-set and did another pull and the same thing at the same RPM. I thought it may be random, but no. I checked the codes right before the pull (while I was driving) and it did have a radio code. I will post all codes later today.

Thanks

RB

 

OK codes are:

PCM 1514 (no surprise)

TSC C1278H

Radio U1016H,U1064H,U1096H

No other codes or lights. Radio code was present just before 1514 was thrown. DIC displayed "reduced engine power" & "service traction control"

Thanks

 

Sorry OP I did not mean to hijack you thread I had a similar thread going and accidentally posted in yours.

 

I have a 2001 coupe and have had this issue in the past.

First on the codes, the H at the end means history and they have probably corrected themselves with additional ignition cycles.

The PCM 1514 suggests a throttle pedal position sensor malfunction. The TCS code may come into play also even though it has a H after it.

The PCM can usually be fixed 2 ways. 1. Simply replace the sensor, about $100 at the dealer. 2. May need to replace the whole pedal assembly and sensor, about $500 at the dealer.

Have had both done over the years. As suggested above, shut the car off, wait 10 seconds and restart, power loss goes away. After 2 ignition cycles the warning lights also go away, but not the codes on the DIC.

Hope you have a good vette tech and fair dealer service department to help you resolve your problem.

 

OK here to the OP my car had the reduced engine power from a bad tune in the car. I had it worked on and car also is F/I on it. So when this happen to mine. The only way that it would start again was unhooking the battary that will reset the pcm. Are the that Matt posted up in here. But if you unhook the battary it takes it about 45 min's to clear it that way.

 

Pedal Assembly for the 08' Pontiac I just fixed this problem on was $65 at Autozone-it came in a GM box. Unhooking the battery is the WORST thing you can do, you loose the needed diagnostic info you need to FIX the problem and you run the risk of introducing a lot more fake codes that will make finding the issue more complicated. There is only a few times you should disconnect your battery-when your putting a new battery in OR working on the electrical system and you do NOT want any short circuits.