Question about 2002 Chevrolet TrailBlazer

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2002 trailblazer lxt codes p1516 & p1220

I cleaned the throttle body and checked the connection on both the gas pedal and throttle body and were both ok..my tb has a new battery in it but if the alternator goes bad would it cause this issue to happen as well? When I was draining it just shut down and won't start..if indeed the pedal sensor is bad would it cause the to not to start if the throttle body is good?

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I had a problem with no start issues,i found the little motor that works the the throttle valve was not working.i replaced throttle body and now i have
had no more problems

Posted on Mar 30, 2014

Testimonial: "So I tested the throttle body and it's at a 48% when the car is just in the on position and not running.. Do you what the percentage the throttle body is suppose to be at when in just the on position"

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  • Justin
    Justin Mar 30, 2014

    "So I tested the throttle body and it's at a 48% when the car is just in the on position and not running.. Do you what the percentage the throttle body is suppose to be at when in just the on position"

  • fredcota
    fredcota Mar 31, 2014

    i am, not sure but do you have fuel reaching the engineand if not try spraying a little fuel into your throttle body then close it up and try to start it,also does your throttle valve open and close easly

  • Justin
    Justin Mar 31, 2014

    I can manually do with my fingers and it open and shuts back at an angle to where it was

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First off when you say it won't start does the motor turn over but won't start or does it do nothing

Posted on Mar 30, 2014

  • Justin
    Justin Mar 30, 2014

    The motor turns but won't start up

  • Brandon Madison Mar 31, 2014

    Do you have a way to check for fuel pressure?

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6ya6ya
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pippall
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SOURCE: 1987 chevy S10 engine idle problem

relace the throtle air idle valve.The temp switch will allso cause this problem.

Posted on Jul 19, 2009

  • 144 Answers

SOURCE: code p0121 TPS

THERE IS A TP SENSOR BUILT INTO THE THROTTLE ACTUATOR. THESE TRUCKS HAVE BEEN KNOWN FOR A FEW PROBLEMS IN THIS AREA. THROTTLE ACTUATOR IS NOT SERVICEABLE. THE THROTTLE BODY WILL NEED TO BE REPLACED IF IT IS PROVEN FAULTY. THE APP SENSORS ARE LOCATED IN THE GAS PEDAL MODULE. THESE SEND SIGNAL TO COMPUTER TO TELL IT WHERE YOUR FOOT IS, THEN COMPUTER SENDS COMMAND TO THROTTLE ACTUATOR TO OPEN OR CLOSE THROTTLE BASED ON THIS INPUT. THE SENSOR IN THE THROTTLE ACTUATOR DELIVERS A MESSAGE BACK TO THE COMPUTER TO TELL IT WHAT THE ACTUAL THROTTLE POSITION IS. IF THESE SIGNALS DONT MATCH(WHERE THROTTLE IS COMMANDED AND WHERE IT ACTUALLY IS)THE CHECK ENGINE LIGHT WILL ILLUMINATE AND THE VEHICLE COULD GO INTO A REDUCED POWER MODE. HOPE THIS HELPS YOU!

Posted on Sep 07, 2009

  • 1 Answer

SOURCE: 2006 Chevrolet Trailblazer. Battery Ok.

Hallo

have the same problem with my Trailblazer, has someone a solution ?

Posted on Jun 03, 2010

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SOURCE: 2003 Silverado 1500 HD 6.0 Liter starting issues

I am having the same issues on my Chevy 03 HD 1500. It takes at least two turns of the ignition to get it going. I have replaced the battery, Fuel Filter, Fuel Engine Relay and I am now Replacing the Starter Engine Relay. If you have any other suggestions let me know! I will share as well. Also, last couple of days Oil Pressure Gauge is acting strange. It will read from 1/4 point to 3/4 point while driving. Working on that as well.

Posted on Sep 10, 2010

dttech
  • 4803 Answers

SOURCE: Have 2003 chevy tahoe with

There is a Tecnical Service Bulletin (TSB) that specifically addresses codes P0120, P0220, and P1516.

It says that the TAC Module can set these codes erroneously under certain conditions. It is very likely that if your vehicle is diagnosed according to the provisions of this bulletin, the problem can be corrected without having to purchase or replace any parts.

It is Technical Service Bulletin number 03-06-04-032
Issued June 16, 2003

Please also review this article: What Else Could Be Wrong?

Posted on May 07, 2011

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Related Questions:

1 Answer

P2106 P2110 P2135 P1516


Here is what meens those codes:

P2106
Throttle Actuator Control System - Forced Limited Power

P2110
Throttle Actuator Control System - Forced Limited RPM

P2135
Throttle/Pedal Position Sensor/Switch "A"/"B" Voltage Correlation

P1516
Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance

I beleive that there is, specifically for chevrolet aveo 2006 a technician service bulletins.

You should have it checked at gm dealer!!!

ask for
TSB Number: SB-08-06-04-004
TSB Number: 08-06-04-023

Jan 27, 2014 | 2006 Chevrolet Aveo

1 Answer

Engine won't start and shows trouble code P1516 and reduced engine power light is on


Here is the definition of the code.

Possible causes - Faulty Throttle Actuator Control (TAC) module
- Throttle Actuator Control (TAC) module harness is open or shorted
- Throttle Actuator Control (TAC) module circuit poor electrical connection (loose or broken wires)

P1516 CHEVROLET Description The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. The TAC module continuously test the integrity of this data. When the TAC module is unable to write or read data to and from Random Access Memory (RAM), or the TAC module is unable to correctly read data from the flash memory or and internal TAC module processor fault is detected and the Detected Trouble Code (DTC) is set.
Read more: http://engine-codes.com/p1516_chevrolet.html#ixzz286Gl3cSo

Sep 28, 2012 | 2002 Chevrolet TrailBlazer

1 Answer

When I accelerate my 2002 trailblazer it kinda stalls then kicks in later is it the throttle body or a sensor or?


Do you have the check engine light on at any time? If so, you need to get the codes scanned and make note of what the codes are.
It's possible the accelerator pedal sensor has a dead spot in it, causing the hesitation. It probably would be a good idea to have the throttle body cleaned (front side and back side).

Aug 20, 2011 | 2002 Chevrolet TrailBlazer

1 Answer

I have the p1516 code and it will not start it is a 2002 envoy with the 4.2


OK P1516 is usually have something to do with throttle body or gas pedal, My 1st choice would be the throttle body I would start by removing the air intake hose to gain access to the throttle body once that is out of your way look at the throttle plate with the key on the plate should be partly open if it's fully close or open also try to move the throttle plate DO NOT FORCE IT it should not move when the key is on if it does then you have to replace it, the next to do is to have someone step on the gas pedal while you look at the throttle plate, with the gas pedal to the floor the plate should be wide open . Now the second choice would be the gas pedal and that calls for some electrical back ground, So start with the throttle body., Good luck

May 23, 2011 | GMC Envoy Cars & Trucks

1 Answer

The reduce engine light comes on at 50 mph what could the problem be


DTC P0120 P0220 P1516 P2135 these should be the problem codes.
2003-2006 Chevrolet Avalanche, Corvette, Express, Monte Carlo, Silverado, SSR, Suburban, Tahoe, Trailblazer. for reduced engine power. p0120 is throttle position sensor, ( tps ). p0220 is relates to tps, p1516 tps is out of range. p2135 is a throttle body code, the throttle body needs replaced. but before you do it replace tps first to see if it takes care of the other codes. have a good day !!

Feb 18, 2011 | 2003 Chevrolet TrailBlazer

1 Answer

Idles fine sounds good but when u have incline or give it alot of gas it goes into reduced power mode and throws up two lights and two codes p1515 and p1516. Once in reduced power mode u cant do anything...


These codes are related to the throttle body and the throttle position sensor. Check to make sure there is no binding at the throttle body. The problem could also be the stepper motor that drives the throttle plate.

May 21, 2010 | 2002 Chevrolet TrailBlazer

2 Answers

I have trouble code p1516 , the truck will stall ocassionally after it stalls i crank it up and it does fine


DTC P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance

Your vehicle has an electronic throttle body unit so it uses voltage signals to control throttle blade in the throttle body. There are a few different issues that can cause this problem.

First off there is a update for the PCM to address those codes, but you will have to take it to the dealer for that.

Second there is issues with the actuator on the throttle body binding up and causing the codes.

Third there is a yellow wire coming off the throttle body connector that breaks inside internally and cannot be seen to the naked eye. The best way to test that is to grab the wire about 5 inches from the connector and tug if it feels spongy or breaks, that’s your problem.

Fourth there is a ground at the back of the passenger side head that becomes loose.

Dec 02, 2009 | 2003 Chevrolet Tahoe

1 Answer

2002 Chevy Trailblazer


hi, those sound like throttle actuator codes. the throttle body on your vehicle should be an electronically controlled unit without wires to control actual acceration an deceleration. now, there is also an electronic switch called a potentiometer on the gas pedal that transmits signal to the throttle body to tell it what to do. most of the time, the throttle body is what goes bad here. you should also check the wiring to the unit for bad connection by wiggling the wire connector and seeing if the reduced engine power light comes on. if this happens, you will likely have to replace the wiring pigtail and the throttle body. but, in some cases, the gas pedal switch goes bad, and likely what is not allowing the transmission to shift out of park, the pcm may lock out the solenoid controlling the shifter. but, don't just run with that answer, it maybe completely wrong. i have seen more throttle bodies and wiring harnesses go bad than gas pedal switches in those vehicles. but you might want to have a shop diagnose further, it may even be two unrelated problems, or in the powertrain computer itself.

Mar 26, 2009 | 2002 Chevrolet TrailBlazer

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