U1736 – OBD-II DTC

OBD-II DTC U1736 – SCP (J1850) Lack of Acknowledgment for Telltales

DTC U1736 meaning

DTC U1736 refers to a communication issue within the vehicle’s network, specifically related to the SCP (Serial Communication Protocol) using the J1850 standard. This code indicates a lack of acknowledgment from the telltale module, which is responsible for illuminating warning lights and indicators on the dashboard. When the module fails to respond, it can lead to a situation where the driver is not informed of critical vehicle conditions.

DTC U1736 symptoms

Common symptoms associated with DTC U1736 may include:

• Warning lights on the dashboard not illuminating when they should
• Inconsistent operation of telltales
• Possible communication errors with other modules
• Loss of functionality in certain vehicle features

DTC U1736 causes

Several factors can lead to the occurrence of DTC U1736, including:

• Faulty telltale module
• Wiring issues, such as damaged or corroded connectors
• Software glitches in the vehicle’s control modules
• Interference from other electronic components

DTC U1736 seriousness

DTC U1736 is considered a moderate issue. While it may not immediately affect the vehicle’s drivability, it can lead to a lack of critical information for the driver. Ignoring this code may result in undetected vehicle problems, which could compromise safety.

How to diagnose DTC U1736

To diagnose DTC U1736, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the code.
2. Inspect the telltale module and its connections for any visible damage.
3. Check the wiring harness for continuity and signs of wear or corrosion.
4. Review the vehicle’s service history for any previous related issues.
5. Perform a network scan to identify any other DTCs that may be present.
6. Test the telltale module’s functionality using a multimeter or diagnostic tool.

How to fix DTC U1736 step-by-step instructions

To fix DTC U1736, follow these steps:

1. Address any wiring issues by repairing or replacing damaged connectors.
2. If the telltale module is faulty, replace it with a new or refurbished unit.
3. Update the vehicle’s software if a glitch is suspected.
4. Clear any interference from other electronic components by checking their installation.
5. Re-scan the vehicle to ensure the DTC has been resolved.

How to erase DTC U1736

To erase DTC U1736, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Access the diagnostic menu and select the option to clear or erase codes.
3. Confirm the action and wait for the scanner to complete the process.
4. Disconnect the scanner and take the vehicle for a test drive to ensure the code does not return.

Recommended tools for OBD-II 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.