What Does U1136 Mean?
This code indicates that a control module is not receiving valid telltale (warning light/indicator) data over the SCP network. The instrument cluster or body control module may be failing to transmit or receive warning lamp status information.
Common Causes
35%
Faulty instrument cluster module
25%
Body Control Module communication fault
20%
SCP bus wiring damage or poor connections
12%
Failed bulb driver circuits in cluster
8%
Power or ground issue at instrument cluster
Diagnostic Steps
1
Step 1: Check instrument cluster for proper power and ground using voltage meter
2
Step 2: Monitor telltale status data on scan tool from both BCM and instrument cluster modules
3
Step 3: Perform cluster self-test/bulb check sequence per manufacturer procedure
4
Step 4: Inspect SCP bus connections at instrument cluster connector for corrosion or damage
5
Step 5: Test SCP bus signal integrity at cluster connector during key-on and engine running
Estimated Repair Cost
$150 - $900
Parts + labor, varies by vehicle and location
This code indicates that a control module is not receiving valid telltale (warning light/indicator) data over the SCP network. The instrument cluster or body control module may be failing to transmit or receive warning lamp status information.
The most common cause of U1136 (SCP (J1850) Invalid or Missing Data for Telltales) is: Faulty instrument cluster module
Typical repair costs for U1136 range from $150 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Warning lights may not illuminate to alert driver of critical system failures. Driver may be unaware of low fuel, engine problems, or brake system issues.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1136 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Network
System
Network Communication / Instrument Panel
Difficulty
Type
Manufacturer
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
