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10-08-2016, 02:43 PM | #1 |
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Join Date: Jun 2015
Location: Winnipeg, Mb
Posts: 137
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P1516 engine code
Now this isn't on a swap truck but I was hoping someone would still be able to help me out anyway. So my daily driver 03 silverado 1500 5.3 keeps throwing a P1516 code causing me to lose complete throttle input control. A message comes up in the cluster saying reduced engine power and when I scan it it says throttle actuator control. So I tried replacing it and the same thing still happens. Now I've heard it could be a block ground problem but I haven't checked that yet. Just wondering if anyone has ever had this problem and been able to fix it.
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10-08-2016, 07:55 PM | #2 |
meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
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Re: P1516 engine code
Usually caused by an error in (or a mismatch of), the TAC system. So thats the TAC, the TB, the ECM, and the pedal.
Since its not a swap, I'm ruling out a parts mismatch unless you had recently replaced something (before the error occurred). Look at the purple and yellow wires coming off the TB. Lightly tug, wiggle them and look for cracking/breaking/fraying within ~4-6" of the TB. Also make sure they are not pulling out of the molex plug, or aren't physically pinched or broken. There is also a grounding point (at least one) on the back of the engine, which can cause lots of fun problems. Did you do anything to the truck (mods, tune, wheels, anything) before the error?
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10-11-2016, 12:54 AM | #3 | |
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Location: Winnipeg, Mb
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Re: P1516 engine code
Quote:
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10-11-2016, 07:47 PM | #4 | |
meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
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Re: P1516 engine code
Quote:
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD
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10-12-2016, 01:27 PM | #5 | |
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Join Date: Jun 2015
Location: Winnipeg, Mb
Posts: 137
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Re: P1516 engine code
Quote:
Makes sense.
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10-11-2016, 03:29 PM | #6 |
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Join Date: Jun 2016
Location: Visalia California
Posts: 891
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Re: P1516 engine code
Have seen several of these where the connections at tac module have loose pins. Wiggle connections at tac. Also does it crank slow have seen several where low battery voltage causes p1516
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