What does the error code P2135meanonthe Chevy Silverado? This error code means the signals of the throttle position sensor 1 and 2 do not agree with each other and also do not agree with the accelerator position sensor.
As it is one of the most common Chevy Silverado error codes, you will probably face this problem now or later. So, it is vital to know the reasons, symptoms, and solutions behind the P2135 Chevy Silverado issue.
A faulty throttle position sensor is the most common cause of the P2135 error code. There are many more causes of this error code which we will discuss in this article. After analyzing a number of Silverado with the same code, we have come up with this complete troubleshooting guide. So stay tuned.
P2135 Chevy Silverado
P2135 is a powertrain code that can affect your Chevy Silverado and other model or make of vehicle that contains a throttle system known as “Drive By Wire.” It means that the vehicle uses actuators and sensors to regulate the throttle body.
The P2135 error code is set when the powertrain control module detects an incorrect reading about the voltages sent by the throttle position sensor 1 or 2 and the accelerator pedal position sensor. In addition to the faulty throttle position sensor, we have found many more causes behind the P2135 Chevy Silverado code.
These are a defective accelerator pedal position sensor, damaged or corroded terminals in the electronic control module, wiring issues, and a faulty powertrain control module.
Now, we will discuss the above-mentioned reasons and symptoms in detail. You will also get the solutions for each reason in the below guide.
A Faulty Throttle Position Sensor
Owners of the 2003 Chevrolet Silverado 1500 trucks have complained that they are getting a “Reduced Engine Power” error message in their trucks. They are also facing the P2135 Chevy Silverado 2003 issue.
This problem can happen to all models of the Chevrolet Silverado. We have found out that this issue occurs because of a faulty throttle position sensor most of the time.
Solution: The faulty throttle position sensor needs to be replaced to fix this problem.
A Defective Accelerator Pedal Position Sensor
Sometimes, you will get the P2135 error code on your 2011 Chevrolet Silverado 1500 truck. In this case, you will also get a check engine light and a “Reduced Engine Power” error message, which are common symptoms for the P2135 Chevy Silverado 2011 issue. This problem happens for other models of Chevrolet Silverado as well.
A Chevy Silverado truck owner said in the Chevrolet Forum regarding this,
“I was driving up the highway last night and my truck started to jump/shut off at the same time. I got the error code on my dash that says “Reduced Engine Power” or something like that. I came to a stop and turned the truck off. Upon turning it back on, the check engine light was on, but it seemed to drive okay. I managed to drive to the nearest AutoZone to get a diagnostic test, which gave me the error P2135.”
The reason behind such problems is a defective accelerator pedal position sensor.
Solution: In this case, the defective accelerator pedal position sensor needs to be replaced to solve the problem.
Damaged Or Corroded Terminals In The Electronic Control Module
We have found out that the 2006 Chevrolet Silverado 1500 Regular Cab can show the P2135 error code for damaged or corroded terminals in the electronic control module.
In this case, along with facing the P2135 Chevy Silverado 2006 issue, you might find out that your vehicle’s engine is stalling. This problem can happen to other Chevrolet Silverado models as well.
Solution: To solve this issue, you have to clean or replace the terminals in the electronic control module.
Sometimes, you can get the P2135 error code on your 2007 Chevrolet Silverado 1500 Regular Cab, along with the vehicle’s StabiliTrak system going off automatically. Even after replacing the throttle position sensor, this problem won’t be solved.
This P2135 Chevy Silverado 2007 issue is not just an issue for the 2007 Chevrolet Silverado 1500 Regular Cab but also a problem for all the other models of the Chevrolet Silverado. This issue occurs when the wiring harness at the throttle body and pedal is open or shorted.
Solution: In such cases, the wiring harness of the throttle body and pedal needs to be changed to fix the problem.
A Faulty Powertrain Control Module
It is another common reason behind the P2135 error code on every Chevrolet Silverado vehicle. Many people complained that they are facing the P2135 Chevy Silverado issue on their 2009 Chevrolet Silverado 1500 trucks. They are also facing a limp mode issue on their trucks.
If none of the above-mentioned causes seem to be at fault, then the possibility is because of a faulty powertrain control module.
Solution: You must replace the faulty PCM to fix this problem.
Frequently Asked Questions (FAQs)
What does the P2135 code mean?
This particular error code indicates that there is a fault in your vehicle’s throttle control systems. However, more precisely, this error code appears when your vehicle’s powertrain control module identifies an issue with one of the throttle position sensors and the accelerator pedal position sensor. In most cases, the electronic control module forces the car into reduced power mode as well.
Can I drive with the P2135 code?
Yes, you can drive with a P2135 error code, but experts don’t recommend it. It is because the P2135 error code can cause your car’s engine to stall out. You can also face a limp mode issue on your vehicle when you get this error code. So, it is best to avoid driving your vehicle with a P2135 trouble code.
What causes a throttle position sensor code?
A throttle position sensor code is generally a P0122 error code. It means that the throttle position sensor or switch A circuit has low input. When the throttle position sensor “A” exhibits a lower voltage than usual, the powertrain control module triggers the P0122 error code. When this occurs, your car will have a huge problem with acceleration, display limited speeds, and probably even stall.
The P2135 error code may seem difficult to diagnose. Whether you are facing the P2135 Chevy Silverado 2008 issue on your 2008 Silverado 1500 or any other Chevy, it is important to diagnose this trouble code correctly.
It isn’t safe to drive your Chevy with a computer-controlled throttle that is not sure how much throttle it is giving your vehicle. If you are looking for the reasons, symptoms, and solutions to the P2135 Chevy Silverado issue, then hopefully, this article has helped you.
If you have any more queries or your problem is not solved, then don’t hesitate to let us know in the comment box.
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Sadeek Matt, “The Human Truckopedia”, has dealt with all types of trucks for 6 years with another 2 years of experience in the automobile industry. He is one of our key team members who solve truck-related problems for Vehicle Bro’s content team to come up with answers to readers’ queries.
He loves scuba diving apart from handling trucks and according to team members, he’s a guy with a great sense of humor who loves living life to the fullest.