What Does U1170 Mean?
The vehicle's communication network is not receiving proper data from the cellular phone or paging system module. This indicates the hands-free phone integration system has lost communication with the vehicle network.
Common Causes
40%
Failed or disconnected cellular phone integration module
25%
Damaged wiring harness to phone module
15%
Poor ground connection at phone module location
12%
Blown fuse to cellular phone system
8%
Software corruption in phone integration module
Diagnostic Steps
1
Step 1: Locate cellular phone module (often in center console, overhead console, or trunk)
2
Step 2: Verify power supply to phone module using multimeter (check for battery voltage and ignition-switched power)
3
Step 3: Inspect module connector for corrosion, moisture intrusion, or damaged terminals
4
Step 4: Check antenna connection if module has external cellular antenna
5
Step 5: Attempt module reset or reflash if power and connections are good
Estimated Repair Cost
$100 - $600
Parts + labor, varies by vehicle and location
The vehicle's communication network is not receiving proper data from the cellular phone or paging system module. This indicates the hands-free phone integration system has lost communication with the vehicle network.
The most common cause of U1170 (SCP (J1850) Invalid or Missing Data for Cellular Phone / Paging System) is: Failed or disconnected cellular phone integration module
Typical repair costs for U1170 range from $100 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
No direct safety impact. Vehicle remains fully operational, only hands-free phone features are affected.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1170 to identify the root cause.
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Quick Info
Category
Network
System
Telematics/Cellular Communication System
Difficulty
Type
Manufacturer
Recommended Tools
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