Acura DTC P1687 – A/T FI Signal B High Input
DTC P1687 meaning on Acura
The Diagnostic Trouble Code (DTC) P1687 on an Acura indicates that there is a high input signal detected in the Automatic Transmission Fluid Indicator (A/T FI) circuit. This typically means that the signal being received by the A/T FI system is higher than the specified range, which can lead to issues with the transmission operation.
Acura DTC P1687 symptoms
Symptoms of DTC P1687 on an Acura may include:
- Check Engine Light illuminated
- Transmission shifting issues
- Reduced fuel efficiency
- Vehicle may go into limp mode
Acura DTC P1687 causes
Common causes of DTC P1687 on an Acura include:
- Faulty A/T FI sensor
- Wiring or connection issues in the A/T FI circuit
- Corrosion or damage to the A/T FI system components
Acura DTC P1687 seriousness
The seriousness of DTC P1687 on an Acura depends on the underlying cause and how it affects the transmission system. Ignoring this DTC can lead to further transmission problems and potential safety issues. It is recommended to address this code promptly to prevent any long-term damage.
How to diagnose DTC P1687 on Acura
To diagnose DTC P1687 on an Acura, you can follow these steps:
- Use a diagnostic scanner to retrieve the DTC and freeze frame data
- Inspect the A/T FI sensor and its wiring for any visible damage
- Check the A/T FI system components for proper connection and corrosion
- Perform a continuity test on the A/T FI circuit to check for any open or short circuits
How to fix DTC P1687 on Acura
To fix DTC P1687 on an Acura, you can try the following:
- Replace the faulty A/T FI sensor if found defective
- Repair any damaged wiring or connections in the A/T FI circuit
- Clean or replace any corroded A/T FI system components
- Clear the DTC using a diagnostic scanner after making the necessary repairs
How to erase DTC P1687 on Acura
To erase DTC P1687 on an Acura, you can use a diagnostic scanner to clear the code from the vehicle’s memory. After addressing the underlying issue causing the DTC, clearing the code will reset the Check Engine Light and allow the system to monitor for any new faults.
Recommended tools for Acura diagnostics
Explore our expert picks: The Best OBD2 Scanners for 2025
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.