What Codes Will This Page Cover?
On this page, you’ll get to learn more about the following codes:
- P0883 TCM Power Input Signal High
- P0884 TCM Power Input Signal Intermittent
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What Is the P0884 Code?
Symptoms
Causes
Seriousness
Can I Still Drive?
Diagnose
Difficulty of Inspecting
Get Additional Help
The P0883 and P0884 code definitions are “TCM Power Input Signal High” and “TCM Power Input Signal Intermittent,” respectively. These error codes both indicate that the powertrain control module (PCM) or engine control module (ECM) has identified a problem with the power flowing to the transmission control module (TCM), with that input voltage signal being either too high or intermittent. This is a generic powertrain code and can show up in any OBD-II-equipped vehicle.
More About the P0884 Code
Your electronic transmission control system utilizes a network of computers, also called control modules, that require constant communication between control modules using the controller area network (CAN). The CAN is able to transmit information of all kinds — your transmission input and output speed, RPM, vehicle speed, wheel speed, and more. For example, your PCM may use input signals from the transmission input speed sensor and transmission output speed sensor to determine transmission shift efficiency. However, your TCM needs proper power to send and receive this information. These diagnostic trouble codes indicate that there’s an issue with the power source.
What Are the Symptoms of a P0884 Code?
Probably the first symptom you’ll notice is just that your check engine light or transmission-related malfunction indicator lamp will turn on. However, the power input circuit malfunction can also lead to a poorly functioning transmission overall. Suppose you’re dealing with a general automatic transmission malfunction. In that case, the lack of data from transmission sensors can generally result in harsh shifting, including transmission shift failure at times and excessive fuel consumption.
What Are Some Causes of a P0884 Code?
The most common causes of the P0883 and P0884 fault codes have to do with issues surrounding electrical failure, although mechanical failure is also possible. Here are a few of the possible causes related to these TCM-related codes:
- Bad relay or blown fuse, including issues with defective fuses
- Vehicle speed sensor failure
- Open or shorted electrical connections, including in the CAN
- Loose connections between wires
- Problem with your connector pins
- Low battery voltage
- Related mechanical transmission failure
- Defective TCM or PCM, or programming error for either
To determine the reason for your high or intermittent voltage condition, you’ll need to investigate the specific concerns in your vehicle.
How Serious Is the P0884 Code?
The P0883 and P0884 generic trouble codes are quite serious. In general, you should consider active codes related to your transmission quite seriously, as these issues with voltage input signals can lead to severe issues with shifting. While you may still be able to drive your vehicle with very little problem, you can’t assume that it will continue to provide for very little issue overall. Assume these generic trouble codes are serious and get help with them as soon as possible.
Can I Still Drive with a P0884 Code?
For the most part, you should still be able to drive with the P0883 and P0884 codes active. It’s likely that you’ll see some issues with shifting in an automatic vehicle for these, but, especially near the beginning, it tends to be possible for you to drive without many issues. However, this doesn’t mean it’s a good idea. If you continue to drive with this code, you could cause more severe transmission problems, and shifting issues could worsen with seemingly no prior warning. Getting help with your codes can make it easier for you to drive without possible transmission harm.
How Easy Is It to Diagnose a P0884 Code?
To diagnose the underlying problem related to the P0883 and P0884 control system codes, you’ll likely need to delve pretty deep. You may need to look at other codes on your code reader, check for a source of vehicle information, look for technical service bulletins from the vehicle manufacturer, have access to factory wiring diagrams, and more. An accurate diagnosis can be hard to achieve, but to avoid transmission damage, you’ll need to be as accurate as possible. An expert will be able to help you with the diagnostic process.
How Difficult Is It to Inspect a P0884 Code?
Inspection for the P0883 and P0884 codes can be quite difficult. Not only will you likely need to perform a visual inspection of the transmission control module and wiring leading to it, but you may also need to use extra tools to make sure every component related to the transmission control module is functioning properly. If you’re struggling with vehicle diagnostic and inspection processes, it’s a good idea to talk to an expert about it.
Need Additional Help with Your P0884 Code?
It’s very common to need extra help with the P0883 and P0884 codes. If you’re looking for expert assistance, you’ll be able to get that additional help from a qualified professional in your area.
First, you’ll want to find an auto repair shop in your area. A local auto repair shop is a great place to go if you’re looking for more information about the problems your vehicle is experiencing and an accurate assessment of the vehicle in question.
You may also want to check out the OBD-II database at KBB.com. This can be especially important if you’re seeing additional error codes, as this database can help you understand those codes.
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