U1105 – OBD-II DTC

OBD-II DTC U1105 – SCP (J1850) Invalid or Missing Data for Chassis Status Request

DTC U1105 meaning

DTC U1105 refers to a diagnostic trouble code indicating that there is invalid or missing data for the chassis status request. This code is specific to the SCP (J1850) communication protocol used in some vehicles. It suggests that the vehicle’s onboard diagnostic system is unable to receive or interpret the necessary data from the chassis control module, which can affect various systems reliant on this information.

DTC U1105 symptoms

Common symptoms associated with DTC U1105 may include:

• Illumination of the check engine light
• Inconsistent or erratic vehicle performance
• Malfunctioning of chassis-related systems (e.g., ABS, traction control)
• Communication issues between modules
• Possible loss of certain vehicle features

DTC U1105 causes

Several factors can lead to the occurrence of DTC U1105, including:

• Faulty chassis control module
• Wiring issues, such as damaged or corroded connectors
• Communication network failures
• Software glitches in the vehicle’s control modules
• Faulty sensors that provide data to the chassis control module

DTC U1105 seriousness

The seriousness of DTC U1105 can vary depending on the vehicle’s specific systems affected. While it may not pose an immediate safety risk, it can lead to:

• Decreased vehicle performance
• Increased wear on components due to improper functioning
• Potential failure of critical systems, such as ABS or stability control
• Inability to pass emissions testing

How to diagnose DTC U1105

To diagnose DTC U1105, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC U1105.
2. Check for any additional trouble codes that may provide more context.
3. Inspect the wiring and connectors related to the chassis control module for damage or corrosion.
4. Test the chassis control module for proper operation.
5. Verify the communication network for any faults or interruptions.
6. Check the vehicle’s software for updates or known issues.

How to fix DTC U1105 step-by-step instructions

To fix DTC U1105, follow these steps:

1. Address any wiring or connector issues found during diagnosis.
2. Replace or repair the chassis control module if it is determined to be faulty.
3. Ensure that all related sensors are functioning correctly and replace any that are defective.
4. Update the vehicle’s software if necessary.
5. Clear the DTC using an OBD-II scanner and test drive the vehicle to see if the code returns.

How to erase DTC U1105

To erase DTC U1105, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Access the trouble codes menu on the scanner.
4. Select the option to clear or erase trouble codes.
5. Confirm the action and wait for the scanner to complete the process.
6. Disconnect the scanner and start the vehicle 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.