What Does U1155 Mean?
Duplicate or secondary fault code indicating the same CD player communication issue as U1154. Multiple modules may be reporting the same missing data from the CD unit on the SCP network.
Common Causes
40%
Failed CD player module not transmitting data
30%
Corroded or loose CD module connector
15%
Power or ground circuit fault to CD module
10%
SCP bus wire damage affecting CD communication
5%
Audio system fuse blown or intermittent
Diagnostic Steps
1
Step 1: Verify this code is related to U1154 and address as same root cause
2
Step 2: Test voltage at CD module connector (should have battery voltage and ground)
3
Step 3: Inspect all audio system connectors for proper seating and corrosion
4
Step 4: Use scan tool to command CD functions and monitor for module response
5
Step 5: Replace CD module if power/ground and wiring are verified good
Estimated Repair Cost
$80 - $500
Parts + labor, varies by vehicle and location
Duplicate or secondary fault code indicating the same CD player communication issue as U1154. Multiple modules may be reporting the same missing data from the CD unit on the SCP network.
The most common cause of U1155 (SCP (J1850) Invalid or Missing Data for Compact Disc) is: Failed CD player module not transmitting data
Typical repair costs for U1155 range from $80 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
No safety concerns. Only affects CD player operation within the audio system.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1155 to identify the root cause.
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Quick Info
Category
Network
System
Audio/Entertainment System
Difficulty
Type
Manufacturer
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