How to fix your Chevy Silverado Check Engine Light | Code P1516 Engine Code Fixed 2003 Silverado 

I’m really glad that this was the fix to your issue! Sometimes it’s just that simple! I hope this is a permanent fix for you!

I've replaced my pedal sensor throttle.control module throttle positioning sensor and it still happens

​@@zachwilschetz6995Did you find the issue?

I’m glad this was able to help you!

Very true

How did it go?

Glad I could help!

@@thedadsection4489 Highly helped. Appreciate you & all the guys like you tht teach y’all knowledge too us….

I’m glad that this video was helpful!

Glad it could help!

It’s been working out nicely, it stays consistent when scanning and gives you some good sources when it comes time to fix the code. I would assume that you do get a whole bunch more if you get the pro version but I have yet to do so. Either way it works great, and I can actually link it in the description.

I’m glad it was useful

My next guess would’ve been to clean the throttle body if what I did hadn’t worked.

For my situation it’s been about 9 months and the code/ reduced engine power mode has not come back on. I drive my truck daily to work and back. I hope this works for you, but keep in mind it could be a number of things. When I first looked in to what it could be it seemed like it could’ve been a number of things. But basic troubleshooting will tell us to check the harness and electrical connections. I hope your fix is as simple as mine was since it saves both time and money! Good luck!!

FIXD, it goes with the OBD-II sensor

Go to a parts store, they check codes for free and will print out a paper with the codes.

Starting with the simplest form of troubleshooting! If the simplest thing will fix it and it’ll save time, why not do it! I hope this was helpful

Sorry this method didn’t work for ya! There are numerous reasons to why it may be happening as I found through RU-vid

Mine was the throttle body, initially I purchased an oem replacement and the code came back, I caved took it to the dealer had them replace the TB with a factory one they performed the relearn process and cleared the code and it never came back. I hate to admit it but with GM sometimes you have to take them to the dealer and or at the very least use factory replacement parts and unfortunately have the techs perform the relearn process

Thanks for the input!

Probably the better thing to do!

I'm sorry this seemed to upset you but newer trucks are computers. Sometimes all you have to do is disconnect the connector and reconnect it and it could have just been poor connection. In regards to how long this fix has lasted me, I have not had the same issue arise since doing this. This is a legit way to troubleshoot and should always be the first thing to do so that if it's as simple as reconnecting a harness then you don't have to waste more time and money.

@@thedadsection4489 Hmmm...I'll take your word for it, but harnesses with a retention clip RARELY have this problem unless you have corrosion building up in this area. NOT "Upset" at all with your claim whatsoever. Surprised would be the better adjective. That said, I have a business with a FLEET of older pickup trucks , 4 of which are GM 2003 to 2007 Sierras and Silverados. Have 2 trucks which had same problem which is apparently a common problem. One truck was fixed a year ago. Replaced entire throttle body, and no repeat issues. Second one just had this problem about a week ago. Tried your suggested method along with cleaning the entire throttle body with brake cleaner and a toothbrush. It fixed the issue temporarily, made the truck run with a much better, very smooth idle, and also cleared the code until the problem returned exactly ONE day later. Just replaced the Throttle position Sensor a few days ago. Problem solved. Running perfect. Just don't see how disconnecting and reconnecting a harness would do anything permanent, but like I said, I'll give you the benefit of the doubt

I appreciate your feedback! I was honestly surprised that this worked for me as well. I just did the first basic step in troubleshooting and it just happened to be where my issue was. I was fully prepared to swap out the throttle body but like I said I guess I was lucky this go around! I guess a more appropriate title for the video would be about how troubleshooting steps can fix an engine code.

@@thedadsection4489 Gotcha. I never seem to have good luck like that. LOL It's always something with higher mileage vehicles regardless of the make. You hear People talk about Toyota all of the time being so reliable. Well......I've had just as many problems with Toyotas as anything else. It is all relative. Toyota loyalists think it is exceptional quality if their Toyota makes it to 200K miles.....LOL. 200K is like an everyday occurrence on these GM Trucks. I bought two GM trucks...BOTH of them with over 170000 miles to start with, and have them YEARS with little to no trouble....mostly knick-knacky issues. A bad Pittman arm and Idler Arm...perhaps an AC Compressor dies..... O2 sensors.....a wheel bearing hub assembly ....Throttle Position Sensor.... Stuff like this I average 325000 before anything serious occurs where big money needs to be spent to correct, and usually by that point they look bad and are pretty torn up, so we just dispose of them at that point