What Codes Will This Page Cover?
- P2127 Throttle/Pedal Position Sensor/Switch “E” Circuit Low
- P2128 Throttle/Pedal Position Sensor/Switch “E” Circuit High
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What Is the P2127 Code?
Symptoms
Causes
Seriousness
Can I Still Drive?
Diagnose
Difficulty of Inspecting
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The P2127 and P2128 codes indicate an issue with a specific switch on the throttle or pedal position sensor. The precise code that you receive will depend on exactly which code you’re seeing. These are the definitions of each code:
- P2127: Throttle/Pedal Position Sensor/Switch “E” Circuit Low
- P2128: Throttle/Pedal Position Sensor/Switch “E” Circuit High
These codes mean that a specific sensor or switch, which your vehicle has designated the “E” sensor or switch, has either a low voltage or a high voltage when compared to the output expected by the powertrain control module (PCM).
More About the P2127 and P2128 Codes
Both of these codes are part of the electronic throttle control system (ECTS), an electronic system that controls the opening and closing of your vehicle’s throttle valve. When you press the accelerator, it sends a signal to the PCM that indicates the specific amount of power you’re requesting. This utilizes certain voltages throughout the system; these codes indicate that the voltage is either too low or too high from what is expected.
What Are the Symptoms of a P2127 Code?
You should expect to see the check engine light as part of the P2127 and P2128 codes. Outside of the check engine light, you might see a number of different issues depending on the underlying cause. This may be anything from the vehicle just generally running poorly and not responding when you press the throttle to stalling issues and an overarching lack of power. These codes can result in no-start codes or in the vehicle going into Limp Mode, which shuts off some features within the vehicle.
What Are Some Causes of a P2127 Code?
These codes often come about because of an issue with the pedal position sensor itself. However, barring that, issues can also arise due to an opening or short in the wiring harness, issues with an intermittent electrical connection, or even a problem with the PCM, although this is very uncommon and will likely result in far more problems than just this one.
How Serious Is the P2127 Code?
The P2127 and P2128 codes are widely considered to be extremely serious codes. Experts will recommend that you do not keep driving with these codes and that you instead talk to an expert to learn more about the problems that you might be experiencing. These codes can have a tremendous impact on your vehicle, which can be dangerous if the problems suddenly arise while you’re driving. Talk to an expert as soon as possible to fix the issue.
Can I Still Drive with a P2127 Code?
You should not drive with the P2127 and P2128 codes active, and in many cases, you just won’t be able to at all. These codes can have a severe negative impact on your vehicle’s drivability; in some cases, the signal may be so deteriorated that you just won’t be able to drive, while in others, you might only notice moderate driving issues. Either way, the problem can progress easily, which is why you shouldn’t drive with these codes active.
How Easy Is It to Diagnose a P2127 Code?
The diagnostic process for this set of codes can be very difficult. Most commonly, experts will use a number of different tools to get to the bottom of your P2127 and P2128 codes, which are tools that you very well might not have. If you don’t have the necessary tools to figure out what’s happening, then it can be exceptionally difficult to understand the real problem. That’s why so many people leave the problem to an expert.
How Difficult Is It to Inspect a P2127 Code?
The inspection process can be just as difficult as the diagnosis process. In fact, this specific code can even trip up a number of experienced technicians, who may accidentally skip steps in the process or not complete a proper visual inspection. This is why it’s so important to leave the inspection process to the experts, who will be able to fix the problem for you regardless of what the issue ends up being.
Need Additional Help with Your P2127 Code?
It’s very common for DIYers and vehicle hobbyists to need extra help with the P2127 and P2128 codes; these aren’t common codes for people to learn how to fix on their own. This is where a local professional can come into play.
Start by using KBB to find a repair shop in your area. You’ll be able to find a repair shop that specializes in any problem and any vehicle, ensuring that you don’t have to worry about finding the right location for your personal needs.
Additionally, you might see other codes coming along with these. Use the KBB OBD-II database to get more insight into what all of those codes may mean for you.
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