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The P0700 trouble code can be detected with the use of an OBD-II diagnostic tool and that signals an issue with the transmission control system. Whether you want to learn more about this code or have encountered it yourself on your vehicle, you’ll find all you need to know in this guide - causes, symptoms, and possible fixes.
What Is the P0700 Code and the Symptoms?
The P0700 Chevy code, or code P0700 on any make and model for that matter, is a diagnostic trouble code that indicates a problem within the transmission control system. It doesn't specify the exact nature of the issue but serves as a general alert that there is a problem with the transmission. The P0700 code is often accompanied by specific transmission-related fault codes that provide more detailed information about the problem but to pinpoint the root issues, further diagnosis is required.
Symptoms of the P0700 diagnostic trouble code may include:
- Check Engine Light. Most transmission issues are generally followed by a check engine light illuminating on the dashboard. This does not inform you about a specific issue but rather lets you know there is a general problem, most commonly with the engine, transmission, or exhaust system.
- Transmission performance issues. The P0700 code can be associated with various transmission performance problems. In some cases, the transmission can shift abruptly and illogically. In other instances, the transmission may be stuck in a gear or on the contrary, slip out of gears upon acceleration.
- Overheating. The P0700 code may also be pointing to overheating of the transmission because of the transmission fluid not working effectively, or because of the lack of it. This can further exacerbate transmission problems and lead to more severe damage if not addressed promptly.
- Transmission warning messages. Some vehicles may display transmission-related warning messages on the instrument cluster when the P0700 code is present. These messages may provide additional information about the issue and help with diagnosing the specific cause of the issue.
- Limited performance mode. A so-called “limp mode” can be a symptom of transmission issues. The on-board diagnostic system of the vehicle may recognize an issue with the drivetrain and as a result, allow the vehicle to be operated in a "limited performance mode" only, in order to protect the transmission from further damage. This mode restricts engine power and may limit vehicle speed to prevent potential harm.
How Serious Is the P0700 Code and What Are the Causes?
The seriousness of the P0700 code depends on the root cause, which may be various. However, in general, ignoring the trouble code may lead to more significant transmission issues over time. If you encounter the P0700 code, it's advisable to perform a thorough diagnosis to pinpoint and address the specific problem triggering the code as soon as possible. Timely action can help prevent further damage and ensure your transmission functions properly.
Here are the most common causes of the P0700 code:
- Faulty sensors. Often, the P0700 code is triggered by malfunctioning sensors within the transmission system. These sensors include the transmission range sensor, transmission fluid temperature sensor, or speed sensor. These sensors monitor various aspects of the transmission's operation and can lead to erratic shifting or performance issues if they fail and provide faulty readings.
- Wiring or connector issues. Damaged or corroded wiring, connectors, or harnesses that connect the transmission control module (TCM) to the sensors can disrupt communication and trigger the P0700 code.
- Transmission control module (TCM) problems. A TCM takes care of controlling the transmission and making sure that it functions and shifts properly. If this system fails, it can lead to the P0700 code.
- Transmission fluid issues. Low or contaminated transmission fluid levels can impact the transmission's performance and trigger the code. This is why the transmission fluid needs to be replaced periodically.
- Mechanical transmission problems. Mechanical issues within the transmission, such as worn-out clutch components or damaged gears, can lead to shifting problems and the P0700 code. This is actually one of the most common causes for the P0700 code.
Can I Still Drive with a P0700 Code On My Car?
It's not generally advisable to drive with any diagnostic trouble code. Especially when ignoring it for prolonged periods of time, the issue may grow in severity and possibly even damage the vehicle components. With the P0700 code specifically, you should be able to drive with the code temporarily. However, you should try to get the code diagnoses as soon as possible.
How Can I Diagnose a P0700 Code?
Diagnosing the P0700 Subaru code involves the same steps as diagnosing the issue on other makes and models. Generally, you should start by performing the simplest diagnostic steps and move your way to the more difficult ones, if you don’t manage to find the root cause of the code.
Here are the steps you should take:
- Clear the codes. The trouble code could be triggered by a one-time faulty reading and not reflect any actual issue. To check if this is the case, clear the diagnostic trouble code and go for a short test drive. This is the simplest possible solution if you are not experiencing any issues with the vehicle.
- Scan for transmission-specific codes. Pay close attention to any transmission-specific fault codes that accompany the P0700 code. Further codes recognized by the OBD-II scanner can provide clues for the origin of the issue.
- Check transmission fluid. Ensure that the transmission fluid level is within the specified range and that the fluid is in good condition. The transmission fluid is to be replaced periodically, as it can become contaminated and lose its quality over time, thus affecting transmission performance.
- Inspect wiring and connectors. Examine the wiring, connectors, and harnesses associated with the transmission control module (TCM) and transmission sensors. Look for loose connections, damaged wires, or corrosion on the connectors, as these can disrupt communication and trigger the code.
- Inspect for mechanical issues. If no electrical or sensor issues are found, it may be necessary to perform a more in-depth inspection of the transmission for mechanical problems such as worn-out clutch components or damaged gears.
- Perform tests with a diagnostic tool. You may perform functional tests on transmission sensors, solenoids, and other components to check their operation. These can usually be done on modern vehicles with the use of an OBD-II tool.
How Difficult Is It to Inspect a P0700 Code?
Like many other diagnostic trouble codes, the root cause of the P0700 code can differ from one instance to another. This means that assessing the difficulty of inspecting the code is not as straightforward. However, in general, you can fix the P0700 code if you are a seasoned DIY mechanic.
Diagnosing the cause of the P0700 code is typically simpler than addressing the issue. Keep in mind that if the problem is due to a worn-out clutch or damaged transmission gears, extensive repairs are needed. If you have no prior experience with maintaining and repairing transmissions, it is best to give your car to a specialized mechanic instead.
How Do I Fix P0700 Code?
The P0700 code is a generic transmission-related diagnostic trouble code (DTC) that indicates a problem in the transmission control system. While the P0700 code itself doesn't specify the exact nature of the issue, it serves as an indicator for other specific transmission-related DTCs that may be present. To fix the P0700 code, it's crucial to diagnose and address the underlying issue causing the transmission malfunction. This typically involves using a professional diagnostic scanner to retrieve any additional DTCs stored in the vehicle's onboard computer system. Once the specific transmission-related DTCs are identified, further diagnostics can be performed to pinpoint the root cause of the problem, which could range from faulty sensors or solenoids to wiring issues or internal transmission failures. Depending on the severity of the issue, fixing the P0700 code may require repairing or replacing damaged components, performing software updates, or even rebuilding the transmission. It's recommended to consult with a qualified automotive technician or mechanic to accurately diagnose and resolve the problem associated with the P0700 code.
Nonetheless, if you set yourself on the path of diagnosing and fixing the issue associated with the P0700 code, head to JEGS, where you can find useful tools for diagnostics of the issue, as well as replacement parts for getting your car back in perfect condition.
