Its a 07 yukon all stock except for an air intake made by injen. In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the. I guess I have to bring it in but I was wondering has anyone else had this problem? Failsafe mode leaves a vehicle in a state that makes it almost impossible to drive and enjoy. Something with the throttle position sensor? If it is not, then there should be some resistance or voltage tests that can be done also in service manual to prove whether it needs replacement or the code is caused by something else. I removed it to clean both sides thoroughly and reinstalled it. If tune-up items are old or the engine is overdue for a tune-up, then ok go ahead and change those, but don't just throw parts at a problem hoping for the best.
We certainly understand how frustrating it can be to look for a code definition and have it not online when you need it. Please use the form on our Contact Page to get in touch with us. She was replacing wheel bearings all the time. YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. The big thing here is to not fall down the rabbit hole of indiscriminately swapping out parts without confirming a diagnosis.
Do this by wiggling the connector and harness while watching the pattern. Aren't these things pretty sensitive? Common mistakes when diagnosing the P0121 code? How does a mechanic diagnose the P0121 code? If you find one missing let us know and we we'll add it immediately! I hadn't heard that if they are. The engine runs and idles just fine. No slowing down or avoidance maneuver whatsoever, same speed, straight head, bam. Look up the other , please use the search box.
The code definitions are a good starting point when determining the cause of the service engine light but where do you go from there? If there is anything that you would like to add, please leave a comment below. Did you ever have electric trains as a kid? Diagnostic Trouble Code P0016 has many causes other than a failed camshaft position sensor. This does not require removal of the throttle body. It is relatively serious problem since it leaves your vehicle in failsafe mode. I would go after that one first. What are the symptoms of the P0121 code? I have a 2007 Yukon Denali 6. I'm kinda handy with tools and such so theres no problem with tackling the issue myself once I get some advice on where to look and what to remove etc.
Cant wait to try that tomorrow hope it works! Its been getting a lot better now but was ideling like at 1500 rpm's and now its down to like 1k. Gotta get this check engine light off. So after doing a little research on the web, I decided to clean the Throttle Plate Body. As the throttle is opened, the reading measured in volts goes up. Take a snapshot of the engine data list while performing the actions listed below. What repairs can fix the P0121 code? If you have any doubt as to repairs on your vehicle, please contact your technician.
Enter the 5 character trouble codes in the search box and submit the search. Hook up your oscilliscope and watch the signal. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module. Need help with a P0121 code? If no problems were noticed, perform a wiggle test. So I get a scan unit via ebay I'm living in one of the Gulf Arab states and it shows code P0121.
This limited power is a failsafe to keep the vehicle able to move, but not super fast. If there is anything that you would like to add, please leave a comment below. These are listed in numerical order for easy searching. The reason is because scan tools take samplings of many different readings over just one or two data lines and can miss an intermittent drop out. It sits right on top of the engine.
If everything is steady, then go ahead and buy a new electronic throttle body Another note of caution. I have an occasionally rough idle but you practically have to concentrate on it to realize and thats been the case since day 1. If it does, trace circuit for short to voltage and repair. We do ask that you please read the info available on the site first so that we can help reduce repeat questions. It no longer is accurately tracking how hard the fuel pedal is being pushed. Thanks There's an extensive diagnostic on this code that requires a scan tool to perform. Failsafe mode leaves a vehicle in a state that makes it almost impossible to drive and enjoy.
And lets face it, if the service engine light is on then you need it now! This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. I have yet to replace it. . It should never have battery voltage. Don't just replace the throttle body unless you see a reason to do so or you have one laying around. It has occurred to me that the error occurs when my wife drive the truck is because we have the seat, mirror, gas pedal, position memory option. Something with the throttle position sensor? This sensor controls engine operation such as fuel cut.
If that is okay then you might try replacing the sensor. I read in other forums that that would happen for about 150-200 miles! The information contained on this site is presented for informational purposes only. Under the dash you will find the Accelerator position sensor, the Throttle position sensor is in the Electronic throttle body. Nothing is impossible, but not very likely, since the misfire code is cylinder specific. In fact I may have knocked something loose when I replaced the Stop Light Switch.