What Does U1166 Mean?
The cassette tape player module is not providing valid data on the SCP network. This indicates the cassette player has lost communication with other vehicle modules.
Common Causes
40%
Failed cassette player module
30%
Disconnected or damaged cassette player connector
15%
Mechanical jam or failure disabling cassette module
10%
Blown entertainment system fuse
5%
Water damage to cassette player module
Diagnostic Steps
1
Step 1: Verify power and ground at cassette player module connector
2
Step 2: Check entertainment fuses and verify proper voltage supply
3
Step 3: Inspect cassette player connector for corrosion, damage, or loose connection
4
Step 4: Test for SCP network signal at cassette module connector (0-7V pulse)
5
Step 5: Remove cassette player and inspect for mechanical damage or foreign objects
Estimated Repair Cost
$80 - $400
Parts + labor, varies by vehicle and location
The cassette tape player module is not providing valid data on the SCP network. This indicates the cassette player has lost communication with other vehicle modules.
The most common cause of U1166 (SCP (J1850) Invalid or Missing Data for Cassette Tape) is: Failed cassette player module
Typical repair costs for U1166 range from $80 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
No safety implications. Affects cassette player function only. Vehicle operates safely without this feature.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1166 to identify the root cause.
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Quick Info
Category
Network
System
Entertainment System
Difficulty
Type
Manufacturer
Recommended Tools
OBD2 Scanner
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