U1173
Lost Communications With Power Roof Module
U1173 is an OBD-II diagnostic trouble code meaning: Lost Communications With Power Roof Module. Common causes: open or short circuit in the module power supply circuit, damage to the wiring harness to the sunroof module. Estimated repair cost: $56–278.
Symptoms
- Sunroof/sliding roof does not open or close
- Hatch works intermittently
- Fault indication on the instrument panel
- The sunroof does not respond to commands from the control buttons
Causes
- Open or short circuit in the module power supply circuit
- Damage to the wiring harness to the sunroof module
- Sunroof control module malfunction
- Connector problems or contact corrosion
- Module software failures
How to Fix
- Check fuses associated with the sunroof system
- Inspect the wiring harness and connectors for damage.
- Check the power and ground of the control module
- Scan the module for additional errors
- If necessary, replace the sunroof control module
Related codes
FAQ
What does the U1173 code mean?
U1173 is an OBD-II diagnostic trouble code that indicates: Lost Communications With Power Roof Module
What causes a U1173 error code?
The most common causes of U1173 include: Open or short circuit in the module power supply circuit; Damage to the wiring harness to the sunroof module; Sunroof control module malfunction; Connector problems or contact corrosion.
How do I fix a U1173 diagnostic trouble code?
To fix U1173: Check fuses associated with the sunroof system. Inspect the wiring harness and connectors for damage.. Check the power and ground of the control module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1173?
Yes, but get it checked soon
How much does it cost to fix U1173?
The estimated repair cost for U1173 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat