Here’s the throttle body relearn procedure 1) Start the engine and let it idle in park for 3 minutes. During that period the idle may be higher idle than normal. 2) After 3 minutes, turn the engine off and leave it off for 60- seconds.
Full Answer
Why do I need a GM throttle body relearn?
If you’ve replaced your GM electronic throttle body or you’ve disconnected the battery, you must do a GM throttle body relearn to establish a new baseline idle. Many car makers including GM started installing fly by wire electronic throttle bodies. In those vehicles, the “gas” pedal isn’t connected to the throttle body by a cable.
What happens when your throttle body goes bad?
If the engine is not receiving proper air supply due to a damaged throttle body, the engine will suffer, and as a result, the driver would experience a drop in performance. If your car feels like it lost half of its power when accelerating, it can absolutely be caused by a bad throttle body. 8. Changed Fuel Consumption
Can a bad throttle body cause a misfire?
As we told you before, a bad throttle body can mess with the air-fuel mixture, and it can also cause your engine to misfire. Misfires are easiest recognized as small bumps when you are revving the engine. 5. High RPM Idle
Are GM throttle position sensors reliable?
GM Sensors have traditionally been outsourced to overseas manufacturers, the same ones who supply throttle position sensors to other makes like Ford and Toyota. As such, theirs are generally no less reliable than anyone else's, but will eventually fail over time.
How do I reset my Chevy throttle body?
Make sure that the accelerator pedal is fully released. Turn ignition switch “ON” and wait at least 2 seconds. Turn ignition switch “OFF” wait at least 10 seconds. Turn ignition switch “ON” and wait at least 2 seconds.
How do you reset a GM throttle position sensor?
The easiest way to reset your throttle position sensor is to unhook the negative cable from your battery for up to five minutes or to remove the fuse for your engine control module.
How do you test a GM throttle body?
2:027:40How To Test The Electronic Throttle Body. GM Vehicles 2006-2011YouTubeStart of suggested clipEnd of suggested clipOr an over limit. Reading then i can conclude that the electronic throttle body is defective. AndMoreOr an over limit. Reading then i can conclude that the electronic throttle body is defective. And needs to be replaced. The second test is to test the resistance between terminals d and e of tps1.
How do I fix my GM code P2135?
What repairs can fix the P2135 code?Replacing one or both throttle position sensors.Replacing the accelerator pedal position sensor.Repairing a fault in a circuit (throttle position sensor circuit, accelerator pedal position sensor circuit) such as open, short, corroded wiring, or poor connection.
What happens if you don't relearn your throttle body?
What happens when you replace the throttle body? If you replace the throttle body, the PCM won't know and will continue to use the adaptive settings as if the carbon buildup is still in place. If you don't do a relearn procedure, the PCM will “hunt” for a new baseline idle.
Does a new throttle body need to be reprogrammed?
1:082:42Throttle Body Relearn: When Should I Reprogram My Car's ... - YouTubeYouTubeStart of suggested clipEnd of suggested clipNow the throttle body is clean or if you're replacing the throttle body and we put it back on theMoreNow the throttle body is clean or if you're replacing the throttle body and we put it back on the vehicle. Now you're gonna have to do a throttle body relearn. So depending on the type of vehicle.
What are the symptoms of a failing throttle position sensor?
Symptoms of a Bad or Failing Throttle Position SensorCar won't accelerate, lacks power when accelerating, or accelerates itself.Engine won't idle smoothly, idles too slowly, or stalls.Car accelerates, but won't exceed a relatively low speed, or shift up.More items...•
How do I know if my throttle body is working?
0:415:03Electronic Throttle Body Diagnostic and Replacement Tips - YouTubeYouTubeStart of suggested clipEnd of suggested clip12 degree default position and I should be able to push it with my fingers. And have it returnedMore12 degree default position and I should be able to push it with my fingers. And have it returned back well this one is pretty sticky. And if you can see here it's not returning. Back.
How do you know if your throttle body is working?
2:2013:53TechTips #1 – Electronic Throttle Body Troubleshooting - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe first thing to do if you suspect a problem with the electronic throttle body is to connect yourMoreThe first thing to do if you suspect a problem with the electronic throttle body is to connect your scan tool and check the engine control module for any stored diagnostic trouble codes or dtcs.
Can I drive with P2135 code?
Is It okay to Drive with? P2135 can cause stalling out, so you should avoid driving with it.
How do I reset my accelerator pedal sensor?
To recalibrate the ECM and accelerator pedal, the ignition switch must be in the ON position and then the accelerator pedal must be slowly and fully depressed from idle to full throttle. Repeat the procedure three times.
What causes code P2135?
The OBD-II scanner error code P2135 problem refers to a problem with the voltage transmission between the throttle and its sensors. While the issue might be due to a faulty Powertrain Control Module, it is likely best to take your vehicle in for diagnostics.
What is throttle position sensor?
The throttle position sensor is one of the most crucial components of any fuel injection system, right after the computer and fuel injectors in terms of importance. GM Sensors have traditionally been outsourced to overseas manufacturers, the same ones who supply throttle position sensors to other makes like Ford and Toyota.
How to tell if TPS is failing?
The first and most telling symptom of a failing TPS is an idle that rises and falls sporadically or maintains a very high or low RPM. This condition can be extreme enough to cause stalling or to cause the tires to chirp when the transmission is engaged.
Can a TPS cause a stalling engine?
Engine Stalling. As mentioned, a failing TPS can result in random engine stalling at idle, but this can also happen under driving conditions. Most often this will occur under hard braking, since the computer assumes normal operation and continues to deliver cruise-amounts of fuel when the throttle butterfly is shut.
What is CARB recall?
The California Air Resources Board (CARB) requires vehicle emission recalls be completed prior to California registration renewal. Uncorrected emission recalls will result in the inability to renew your California vehicle registration.
What is a proof of correction certificate for a GM vehicle?
When a California emissions recall is completed by a GM dealer, the dealer must provide the vehicle owner a “Proof of Correction Certificate” which the owner may need to present to the California Department Of Motor Vehicles (DMV) when renewing their vehicle registration. Without this correction certificate, the owner may be unable to renew their vehicle registration.
What does a bad throttle body mean on a 2019 Chevy Silverado?
November 11, 2019 by Jason. If your Chevy Silverado has a bad throttle body, it can cause it to run terribly. Common symptoms of a bad throttle body include, dirt and grime, the check engine light, and an erratic idle. Your Silverado’s throttle body controls the amount of air that enters the engine. You control the throttle body position ...
How does a bad throttle body affect a Silverado?
So, the symptoms of a bad throttle body will all affect how the vehicle feels responding to your throttle input. A rough idle is also a very common symptom.
How to tell if a Silverado throttle is dirty?
Dirty Throttle Body. While coming to a stop, you may notice that your Silverado feels like it wants to die. The RPM may shoot up by as much as 500 until it finally finds the proper idle speed. This is a telltale sign of a dirty throttle body.
Is the check engine light on a Silverado bad?
The check engine light is one of the most common symptoms of a bad throttle body in your Silverado. The check engine light itself being on is not a bad thing. The trouble codes that are stored in the computer can tell a lot about what is actually going on. This makes diagnosing the throttle body much easier.
Can you clean a throttle body?
Here’s a great video showing how to clean a throttle body. Make sure that you use throttle body cleaner, and not brake parts cleaner, WD40, or even carb cleaner. Cleaning it is easy and cost effective.
What happens if the throttle body is not properly air cooled?
If the engine is not receiving proper air supply due to a damaged throttle body, the engine will suffer , and as a result, the driver would experience a drop in performance.
What is a throttle body?
The throttle body is an important mechanical component found in fuel injected vehicles that controls and regulates the amount of air flowing into the engine. When the throttle body is in its appropriate condition, the engine receives an ideal air and fuel ratio and offers optimum performance. However, when the throttle body is damaged, ...
Why does my engine misfire?
Misfires occur either when the air-fuel mixture is very wrong or when it comes to a weak spark from the spark plug. It is incomplete combustion inside the combustion chamber, in other words. As we told you before, a bad throttle body can mess with the air-fuel mixture, and it can also cause your engine to misfire.
Why is my RPM so high?
High RPM Idle. The throttle body controls the engine’s idle to make sure it is always holding a steady RPM. If there is a problem with the throttle body, it may cause the be way too high. A not calibrated throttle body can also cause this. You can calibrate the throttle body with most diagnostic scanners.
What is the function of a throttle body?
The throttle body’s core function is to regulate and control the amount of air allowed to enter the engine. The input data is sensed from the driver’s pressure on the accelerator pedal of the vehicle. Consequently, more fuel is allowed to enter the internal combustion engine ...
Why is my car slow when accelerating?
This means that a faulty throttle body can mess the air-fuel mixture up, which will cause problems when accelerating. If you notice that your car has a very uneven acceleration – sometimes it is fast and sometimes slow, you might have a bad throttle body.
How much does it cost to replace a throttle body?
The average throttle body replacement cost is between $250 and $650, depending on the car model and labor costs. The throttle body cost between $200 and $500, while the labor cost is around $50 and $150. The throttle body can be differently priced depending on different vehicles, models, and the manufacturing company.
Service Engine Soon Light
The check engine light is one of the most common symptoms of a bad throttle body in your Sierra. The check engine light itself being on is not a bad thing. The trouble codes that are stored in the computer can tell a lot about what is actually going on. This makes diagnosing the throttle body much easier.
Dirty Throttle Body
While coming to a stop, you may notice that your Sierra feels like it wants to die. The RPM may shoot up by as much as 500 until it finally finds the proper idle speed. This is a telltale sign of a dirty throttle body.
Wiring Issues
As your Sierra’s throttle body opens, the various sensors in your Sierra measure the air coming in, and oxygen content coming out. If any of these sensors goes bad, it can feel the same as a bad throttle body. That’s why getting the trouble codes is so important. It can really narrow down what you are looking for.
Erratic Idle
If your Sierra is not letting enough air in at idle, it’ll struggle to keep running. The idle speed will keep jumping.