Hi my name is Jacob and I on a 2006 Chevy 1500 Z 71 4 x 4 I bought this truck about six months ago and Immediately had to buy all new brake lines, two new front calipers all new rotors,pads,new plugs,tires,etc. It ran great until about six weeks ago when it rained really hard and I did about 90 mph down I 94 late for work and since then it started to spit in spotter head throttle hesitation then it wouldn’t start and I’ve gone through cleaned up all the ground wires on the firewall and the two main ones underneath the driver seat on the frame I have clean the injectors I’ve clean the throttlebody and yet it still only starts half the time and will review with no problem but when put into gear and the motor is under a loadIt wantsTo spit and sputter or just start as soon as you put it in gear and I’m confused As to why it’s throwing all these codes P0107,P0101,P0452,P0102,P0120, P0220,P1516,P2135. The only logical thing that comes to mind would be my throttle position sensor or entire throttlebody is junk or my ECM is bad. Please give me a hand.I’ve tried watching most all of your videos and it sounds like my vehicle has a little bit of everything wrong with it but the main thing I can think of is everything is connected to the computer so… Help please?
That's a lot of codes and there's plenty of right ways to start chasing this down.
I'll give you my 2 cents (ignoring the EVAP code it's irrelevant):
I think the biggest clue here is that it happened while you were going 90mph in the pouring rain and you're getting multiple throttle body related codes.
The 1st thing to check on TPS/TAC codes is if water got into the connector.
I'm thinking that this is an issue with the wiring at that connector or water intrusion which may have shorted out one of the 2 TPS (sensors) in there.
I'd inspect the wiring, maybe look at the freeze frame data for what was going on there regarding MAP and Throttle position.
But it seems your 2 TPS (sensors) are in conflict regarding the actual throttle position and I think the MAP & MAF code is "collateral damage" because the computer expects to see an output voltage from the MAP & MAF that correlates to throttle position.
So I'm not dismissing the MAP sensor code. But the MAP is easy to test. 3 pins on the connector. 1 pin is the 5 volt reference and 1 pin is the low voltage ground. The other pin, usually the middle pin, is the MAP sensor voltage output to the computer. (Plenty of info on the internet how to test those). The MAF wouldn't cause a No Start.
So you have the 8 pin connector on your throttle body. The pinout is this:
I'll post a link on how to test those (the link is for testing TPS sensor 2 but with the pinout above you can repeat the voltage tests on TPS sensor 1.
If you test the wiring/connector and they checkout OK, I'd be considering replacing that throttle body. (your TPS sensor is riveted to the throttle body)
The test mentions the problem that GM had with that wiring, it was in this area.
So here's that link:
https://easyautodiagnostics.com/gm/4.8L-5.3L-6.0L/p0220-tp-sensor-tests-1
Unfortunately you have a flex fuel vehicle and so many things can go wrong from the sensors that measure the alcohol level in the tank to the main computer you're going to have to find a guy like me who has a dealer level scan tool to do bi-directional testing on that one rather than just guess. But do realize main computers break all the time on GM products
I got a guy and thanks you for ur insight
I’ll email u a video of how she runs to give u a Lil but more perspective