P2135: TPS Sensor Voltage Correlation

We know the feeling. You’re driving your car, everything seems fine, then suddenly that little light on your dash starts flashing. Then you find out that the culprit relates to error code P2135, and you start scratching your head. "How do I fix trouble code P2135?" You might ask, and great news for you is that we here at AutoZone have created this handy little guide just so you don’t have to be perplexed when you see that strange error code. However, before we dive into potential solutions, it is necessary to understand what the code means and how to diagnose specific problems.

What Does P2135 Mean?

This particular code has to do with an error in your throttle control systems. However, more specifically, this error message is displayed when the Powertrain Control Module detects a problem regarding the transmission of voltages from one of the three main throttle components: (1) position sensor A or B, (2) the throttle plate, or (3) the accelerator pedal position sensor.

The regular and appropriate operation will have the throttle position sensors producing similar outputs. Therefore, when one sensor reads drastically different from the other, the Power Control Module provides the error code P1235.

What are the Symptoms of P2135

The error code might not be the first sign that something is wrong. In fact, this particular code may have several warning signs. First, you might experience a hesitation or possible surge when accelerating. Second, your RPMs might display as higher than usual. Third, while strange, you might experience the revving of the engine without the gas pedal being pressed. Fourth, the engine might stall out when coming to a complete stop or in traffic. Finally, the check engine light will likely illuminate at some point.

What Causes Code P2135?

While the error code P2135 might be frustrating, you are likely to be more annoyed by the number of reasons this code appeared in the first place. Unfortunately, diagnosing the issue is not so cut and dry because of the variety of potential culprits. For one, the problem could stem from a faulty Powertrain Control Module, meaning that there is possibly no voltage issue. You could also be dealing with faulty throttle and position sensors. Another possible explanation is that the wires and connections to each of the sensors have been damaged.

How to Diagnose P2135 Issues

For electrical and computer issues, one of the best things you can do is to take your car in for diagnostic testing. A professional mechanic will be able to perform tests using a multimeter to check the ohm levels of the sensors, ensuring they are within the normal range. Also, they will probably perform back probes on the system with a scan tool. Last, they will do a Technical Service Bulletin and recall check to ensure that there have been no related issues with the particular make and model.

How to Fix P2135

There are a few repairs that can be done to resolve the error code. First, you can replace the accelerator position sensor. Then, you can see if installing new throttle position sensors fixes the error. If neither of these solutions works, then you can try checking for a fault in the circuits or connections. For example, there might be a corroded wire or a short in one of the connections leading to the sensors or the Power Control Module.

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. You can get the parts you need at your local AutoZone Store. If the job is too big for you, seek out one of our Preferred Shops to help you do the job.

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