P0882 Code: TCM Power Input Signal Low

On-board diagnostic (OBD) codes are designed to help mechanics and vehicle owners like you identify possible issues with your vehicle. But before attempting any fixes to resolve the codes retrieved by your scan tool, it’s important to know exactly what they mean.

Code P0882 is one of many trouble codes that may be logged and retrieved from the OBD system. Here is some basic information that may help you understand what this code may mean for your vehicle.

What Does the P0882 Code Mean?

Diagnostic trouble code (DTC) P0882 stands for “TCM Power Input Signal Low.” This code may be logged when the powertrain control module (PCM) detects that the transmission control module (TCM) isn’t getting enough power or has a low voltage condition. Alternatively, the code may indicate a low voltage condition at the transmission output circuit after the PCM or TCM commands the circuit.

Depending on the severity of the problem, related error codes may also be stored with this DTC. Code P0882 is very similar to error codes P0880, P0881, P0883, and P0884.

Modules and Trouble Codes

Modules are obviously electrical devices but they’re smarter on later model vehicles. A module that isn’t getting voltage at all or isn’t getting enough voltage will, within its algorithms, measure input voltage as a form of self-diagnosis. Interestingly, even with lower voltage, most modules can still “think” clearly enough to set a trouble code. Other modules may simply cease to function and illuminate a warning lamp or send a command to display an error message.

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Pro Tip: But sometimes a module will be receiving the right voltage and yet the module’s live data may show and act as if the input voltage is too low. One way or another, every electronic module needs sufficient voltage to do what it is designed to do, especially when it comes to actuators that depend on the module for proper function.

Note: The definition of code P0882 may be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What are the Possible Causes of the P0882 Code?

P0882 is a generic code, so it can have several triggers. Here are the most common:

• Bad relay or blown fuse
• Low battery voltage
• Issues with the transmission control circuit, such as damaged wires or a poor connection
• Defective transmission control module, powertrain control module, or totally integrated power module

What are the Common Symptoms of the P0882 Code?

You may notice the following symptoms if you drive a vehicle that has set a P0882 trouble code:

• Active check engine light
• Vehicle stuck in limp mode
• Erratic transmission shift patterns

How to Diagnose the P0882 Code

Error code P0882 is a generic code that may be set across several makes and models. However, this does not mean that there is a one-size-fits-all approach to diagnosing its underlying cause. The steps for troubleshooting this code will vary depending on your vehicle’s make and model.

Check out this video to get an idea of what the diagnostic process for this code might involve:

How to Fix the P0882 Code

P0882 may share similar triggers and symptoms with other fault codes. However, that does not mean that they share repair steps as well. All vehicles are different, so make sure to refer to a factory repair guide that is specific to your car.

If you’re considering troubleshooting this code on your own, it’s a good idea to refresh your auto repair knowledge before attempting any fixes. Always consult the vehicle repair manual or an online repair database to learn the appropriate diagnostic and repair procedures for this code. Alternatively, you may leave this job to a professional.