U1657 – Invalid or Missing Data for Vehicle Speed.

The ODBII code U1657 indicates that the vehicle’s control module has detected invalid or missing data related to the vehicle speed, which may affect the performance of various systems.

The severity of ODBII code U1657 is moderate.

Common Causes For: U1656 Invalid or Missing Data for Vehicle Speed.

• Faulty vehicle speed sensor
• Damaged wiring or connectors
• Faulty engine control module (ECM)
• Faulty transmission control module (TCM)
• Poor ground connections
• Corroded or loose connectors
• Software issues or glitches in the vehicle’s computer system
• Malfunctioning ABS module (if applicable)

Common misdiagnosis for U1657 Invalid or Missing Data for Vehicle Speed.

• Faulty Vehicle Speed Sensor (VSS)
• Malfunctioning Engine Control Module (ECM)
• Wiring issues or short circuits
• Faulty ABS module
• Incorrect tire size or calibration
• Transmission problems
• Issues with the instrument cluster
• Faulty or corroded connectors
• Problems with the CAN bus communication
• Software glitches or updates needed

Common Troubleshooting Steps

The OBD-II code U1657 indicates that there is an issue with the vehicle speed data, which may be invalid or missing. This code is often related to communication problems between the vehicle’s modules. Here are some common troubleshooting steps to diagnose and resolve the issue:

• Check for Additional Codes: Use an OBD-II scanner to check for any other trouble codes that may be present. Codes related to the transmission, ABS, or other modules may provide additional context.
• Inspect Wiring and Connectors: Examine the wiring and connectors related to the vehicle speed sensor (VSS) and the modules that communicate with it. Look for signs of damage, corrosion, or loose connections.
• Test the Vehicle Speed Sensor: The vehicle speed sensor is responsible for sending speed data to the engine control module (ECM) and other systems. Test the sensor for proper operation using a multimeter or scan tool. If the sensor is faulty, replace it.
• Check Module Communication: Use a scan tool to check for communication between the ECM and other modules (e.g., transmission control module, ABS module). If there are communication issues, it may indicate a problem with the CAN bus or specific modules.
• Inspect the CAN Bus: The Controller Area Network (CAN) bus is responsible for communication between various modules. Check for any shorts, opens, or faults in the wiring. You may need a specialized tool to diagnose CAN bus issues.
• Update Software/Firmware: Sometimes, software issues can cause communication problems. Check if there are any available updates for the vehicle’s modules and apply them if necessary.
• Check for Ground Issues: Ensure that all ground connections related to the VSS and communication modules are secure and free of corrosion.
• Perform a Hard Reset: Disconnect the vehicle’s battery for a few minutes to reset the modules. Reconnect the battery and see if the code reappears.
• Consult Technical Service Bulletins (TSBs): Check for any TSBs related to the U1657 code for your specific vehicle make and model. Manufacturers may have specific fixes or recommendations.
• Seek Professional Help: If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or technician who has experience with your vehicle’s make and model. By following these steps, you should be able to identify and resolve the issue related to the U1657 code.