P1700 code — how to fix error fast

There’s a wide variety of OBD2 codes that can be related to the engine of your vehicle, but those like code P1700 are especially unnerving. They may not pose much danger to the engine operation, but they can affect something almost as equally as important – the gearbox.

Since most drivers are unaware of the P1700 code meaning, we decided to help you by going through some of the most important signs and reasons behind this code. We’ll go on a journey through the symptoms, diagnostic methods, and solutions that may help remove the code and restore the balance during each gear shift in your car.

Why you can trust REREV’s OBD2 code advice: Our automotive expert researchers with experienced mechanics undertakes a thorough research methodology to deliver precise insights on OBD codes. Find out more about OBD2 codes research process..

What does the P1700 code mean?

The P1700 code is a diagnostic trouble code (DTC) that indicates a problem with the transmission control module (TCM) or the transmission itself. It can affect both automatic and manual transmissions. The consequences of the code can vary depending on the severity of the problem, but it can lead to decreased performance, difficulty shifting gears, and even transmission failure.

Common symptoms of the P1700 code include a flashing or solid check engine light, difficulty shifting gears, slipping gears, and reduced fuel efficiency. If you experience any of these symptoms, it is important to get your vehicle diagnosed as soon as possible to prevent further damage to the transmission.

What causes the P1700 code?

There are several potential causes of the P1700 code, each of which requires a different diagnostic approach and fix. Here are some of the most common causes that may trigger the code in your car:

Faulty transmission control module

The transmission control module (TCM) is responsible for controlling the transmission’s shift points and other functions. If the TCM is faulty, it can cause the P1700 code to appear. This can be caused by damaged wiring, a blown fuse, or a malfunctioning TCM.

Wiring issues

Wiring issues can also cause this code to appear. Damaged or corroded wiring can prevent the TCM from receiving the signals it needs to control the transmission, resulting in a malfunction.

Malfunctioning transmission

A malfunctioning transmission can also cause the P1700 code to appear. This can be caused by a variety of issues, such as low fluid levels, damaged gears, or a faulty torque converter.

Other potential causes

Other potential causes of the P1700 code include a faulty shift solenoid, a damaged valve body, or a clogged transmission filter.

Which car models does the P1700 code affect the most?

The code P1700 can affect a wide range of car models, but some are more susceptible than others. The car models that are most likely to be affected by this code are those with automatic transmissions, particularly the following models:

• Nissan Altima: The Altima is one of the most commonly reported vehicles to experience this code due to a faulty range sensor circuit.
• Honda Prelude: Some owners of Honda Preludes have reported issues with the P1700 code, which could be caused by a malfunctioning range sensor or other related components.
• Volvo S80: The S80 is another vehicle that has been reported to have problems with this code. In some cases, this may be due to issues with the TCM or wiring problems.

How to diagnose the P1700 code

Diagnosing this code requires a thorough understanding of the transmission system and the diagnostic tools needed to perform the tests. Here are some steps you can take to diagnose the code:

Check for other DTCs

Before diagnosing the P1700 code, it is important to check for other DTCs that may be related to the transmission system. This can help you identify any underlying issues that may be contributing to the problem.

Check the transmission fluid level and condition

Low fluid levels or dirty fluid can cause the transmission to malfunction and trigger the code. Checking the fluid level and condition is a crucial first step in diagnosing the code.

Use a scan tool to check the TCM

A scan tool can be used to check the TCM for any faults or malfunctions. This can help you identify any issues with the TCM and determine whether it needs to be replaced.

Check the wiring and connections

If the TCM is functioning properly, the next step is to check the wiring and connections between the TCM and the transmission. Damaged or corroded wiring can prevent the TCM from receiving the signals it needs to control the transmission.

Perform a transmission pressure test

A transmission pressure test can help you identify any issues with the transmission, such as low pressure or leaking fluid. This can help you determine whether the transmission needs to be replaced or repaired.

How to fix the P1700 code

Fixing the P1700 code requires identifying the underlying cause of the problem and taking the appropriate steps to fix it. Here are some potential fixes for each cause of the code:

Repairing the faulty transmission control module

If the TCM is faulty, it may need to be replaced. This can be done by a professional mechanic or by purchasing a replacement TCM and installing it yourself.

Fixing the wiring issues

Wiring issues can be fixed by repairing or replacing damaged wiring or connections. This may require the assistance of a professional mechanic.

Repairing malfunctioning transmission

If the transmission is malfunctioning, it may need to be repaired or replaced. This can be a costly fix, so it is important to get a professional diagnosis before proceeding.

Other potential fixes

Other potential fixes for the P1700 code include replacing a faulty shift solenoid, repairing a damaged valve body, or replacing a clogged transmission filter.

How to prevent the P1700 code

Preventing the P1700 code requires proper maintenance of the transmission system. Here are some preventative measures you can take:

• Regular transmission fluid changes
• Checking the transmission fluid level and condition
• Driving without excessive acceleration or braking

Discussing the code with a professional mechanic can diagnose and fix the issue before it becomes more serious and costly to repair.

Our take

In conclusion, the P1700 code can indicate a serious problem with the transmission system. Understanding the code, its causes, and how to diagnose and fix it is crucial for finding an appropriate solution, and this guide hopefully includes all the information you could need.