This a very common problem with GM cars and trucks with “drive by wire” throttle. Luckily th’ throttle body was good, and I was able to find th’ source of th…
Pt.1 2007 Chevy 2500HD “Reduced Engine Power” Warning & Fault Code P1516 Repair @ D-Ray’s Shop
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dude, i have the same problem on my 99 camaro. aut 3.8 6cil
it`s the same issue ??
Thanks for your advice and posting this. Good explanation.
Great advice but do NOT force open the throttle body of an electric
throttle body. I mean I don’t know if this gm throttle body assembly is
that tough (cough cough) but that is just as risky as starting a rotary
engine and turning it or before it reaches is 3 stage warm up cycle (just a
risk level example). Great vid I’m helping a friend out right now with this
vid! Much appreciated. Any experienced gm techs. Care to verify if we
can/should force it open? Or should we have a partner/friend depress the
accelerator pedal from the drivers seat?
Excuse me, but that motor of TBI is a stepper motor (2:25 min.) or a DC
motor controlled by PWM?
Thanks a lot for your help, at least I have a place to start looking for my
problem. By the way, you “red necks” are so ingenious and you make a great
videos, do you do comedy too? Keep up the great work. Jon
You are the man! I do believe I owe you a case of beer if you are ever in
the Vancouver area. That’s right, I had the dreaded ‘Reduced Engine Power’
scenario last weekend and got the codes read (P0120, P0220) by gm dealer,
limped home and found black wire with white stripe broken inside? not week
though? weird, it was nice and copper color. soldered in back up and looks
good so far! Thanks!!!!
What alse can it be i have d same problem
i hooked the scan on my truck and it said throttle body pedal sensor
something like that
Thanks alot
Great video..About to try this on my 03 Suburban with 215,000 miles. Have a
boat to pull out this weekend!
oexcelent video, great master
Great video.thank you
Great video. I dont think its a good idea to open the throttle by hand it
can damage the motor.
Thanks
Check the connector at the throttle position sensor at the pedal, I’ve
heard of over crimped wires on that end as well, if you don’t find anything
there you may have to replace the throttle body. Do you know what error
code you have?
Did everything and it looks fine. So what now? Replace Throttle Body?
hey, I have the same reduced power problem. I did what you had suggested
and did the tug test at both the TB and the pedal, and cleaned the TB. I
also check the mass air sensor. I have not checked the grounds yet. But i
have a question. My reduced engine power displays all the time and runs
like crap. If i were to take the wiring off of the TB and the truck still
runs like crap, is that my problem. Just like if you were checking
cylinders by takeing off the plug wires
We have a 2008 4×4 3500 Duramax and it keeps reducing engine power with our
horse trailer….really dangerous. Is there anything different to fixing
the Diesel to correct this?
I have a gmc 2500 and its not shifting on time. I had the throttle body
adjusted or some sh#t and now its happening again. Would a dirty throttle
body cause this? Last time they adjusted the timing so the stalling
stopped. Any info would be a great help..
No knocking my friend. and I was able to reproduce the problem at any time
even with no load on the truck. Since the repair I have had zero problems
since June of 2011.
Hi & THANKS I just found your video here on the internal broken wire Pt.1
2007 Chevy 2500HD “Reduced Engine Power I like yourself do trouble shooting
videos on certain model N14 Cummins Diesel Electronics ECMs It’s good to
see someone else sharing their tech experience This just reinforces the
power of sharing knowledge and helping our fellow man Call me if you get
stuck on a Cummins N14 Diesel Electronic Problem N14Parts.Com
Youtube.com/user/terrychron Terry Chron 810.653.6300
My 2011 Impala did the same thing last night went to the dealer to find out
it was covered after the bumper to bumper 36000 warranty and was charged
475.00 to fix
Hey man I agree thanks you really did your research
I have an 05 chevy 1500 ive cleaned the throttle body the air intake nd it
still doesnt work, i added coolent nd nothing it turns on nd all but it
doesnt accelerate “/ help?
i have a 1999 chevy Camaro 3.8 the reduce engine power and check engine
light came on i change the throttle body and Mass airflow sensors and it
went off and came back on 2 days later, when i scan it i get code p1518, it
may be my wires where do i check????? thanks in advance
Hello man, greetings from another chevy guy, so i fix some problems in my
truck with this marvelous video, so i remember the scanner(launch) says;
P0171 fuel trim system lean bank 1 /// P0450 catalyst system low efficiency
bank 2 /// P0455 evaporative emission(EVAP) system large leak detected.
what is the meaning of? My truck runs fine, fuel consumption its ok, so
then??? thanks in advanced.
Thanks for th’ kind words, glad it helped!
vare nice
I have a 2003 saturn vue and i keep getting the same code. I can’t go over
15 to 20 miles with out the fear of blowing some thing from high rpms.
Please I can’t afford a new car right now. I cleaned the throttle body like
in your video also replaced air filter. please help,,,
Nice video.
i have a 2003 tahoe and the reduced engine light comes on and reduces my
power. found out that i get a p1516 code. what are my options?
I’m Susie’s husband Bill. After 6 months, 2 dealers, $850 computer and
throttle body clean my very frustrating intermittant problem still existed.
Your tip led me to the problem and saved me $25,000 or so for a new truck-
I will only add a pull tie applied nearest the plug made my every now and
then problem an all the time problem and hence much easier to confirm a
loose wire….and to then fix. Again Thank You so much!
its called ” limp home mode ” you where knocking and then went into it..
Thank you soo much!
These are the best shade tree mechanic videos I have seen on here. Very
detailded and easy to see everything. Makes it look easy to fix you
vehicle. Thanks
your the man!!! i just did a top overhaul and had same problem. watched
your video and i had a little bit of moisture in the plug. Dried it up and
I’m all set. thanx a million bud. p.s. i like the red neck trespassing
video lol
thank you sir, saved me a couple $100, (loose wire in harness)
This problem happened this evening while I was driving my 06 Chevy
Silverado 1500 LT. I found this video, and found it VERY useful! I had no
clue what was going on, after no acceleration, I then restart my truck and
still no acceleration and the “check engine” light appeared as well the
“Reduced Engine Power” light. Although I do not have the tools to fix it,
it will be going into the shop, but I now have the understanding! Thank
you! 🙂
If my dad would have seen this we would have made it to the new house! We
have a 2004 Chevrolet z71 tahoe and July 6 last year it was moving day and
that happened to us
my gauges go off and my locks “lock and unlock by themselves” i also get
many indicators flashing is this bad wiring?
Hey i got a 2004 silverado 1500 ls 4.8 liters and I got the reduce power on
but I check the wires they look fine I clean the throttle body and still
the same but I press the gas and takes forever to move to move what u thing
about that I need to buy a new throttle body any ideas?
Found the yellow one broken
in Los Angeles, some mechanic named Akmhed would charge $500 for that!
Thank you Sir u really helped me with my problem
Sounds like you may have a wiring problem between those two parts. Try the
“tug test” on both connectors.
@mgdallas1 Thanks, glad you got it fixed without too much trouble. Have a
goodun’ D-Ray
@mjuare004 Thank you! Glad it helped.
@draywanda A lot of folk think C is what they all are. So for anyone readn’
this C=2X4 K=4X4. When I was younger I though that C was for the standard
and K was the fancier one lol.
thanks D-Ray. my 2004 Suburban had the same problem and fix — jeff
Im a single mom..and I gotta tell you…u saved me!! I almost went and had
the whole throttle replaced…it as just dirty!!