What Does U1009 Mean?
This is a duplicate or related code to U1008, indicating continued or intermittent loss of engine torque data on the SCP communication network. Often set by a different receiving module than U1008.
Common Causes
35%
Intermittent PCM communication due to connector issues
30%
Intermittent SCP bus wiring fault or poor connection
20%
Powertrain control module intermittent failure
15%
Voltage fluctuations or electrical interference on network
Diagnostic Steps
1
Step 1: Wiggle test all PCM connectors and SCP wiring while monitoring scan tool for loss of communication
2
Step 2: Check for technical service bulletins related to PCM connector or network issues for your vehicle
3
Step 3: Monitor battery voltage while operating accessories to check for voltage drops below 11V indicating charging issues
4
Step 4: Inspect PCM mounting location for water intrusion, especially if module is low-mounted or near potential leak areas
5
Step 5: Use scan tool to monitor network traffic and look for missing or corrupted message packets from PCM
Estimated Repair Cost
$100 - $1,200
Parts + labor, varies by vehicle and location
This is a duplicate or related code to U1008, indicating continued or intermittent loss of engine torque data on the SCP communication network. Often set by a different receiving module than U1008.
The most common cause of U1009 (SCP (J1850) Invalid or Missing Data for Engine Torque) is: Intermittent PCM communication due to connector issues
Typical repair costs for U1009 range from $100 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause erratic transmission behavior, disabled traction control, or harsh shifts. Exercise caution during acceleration and in slippery conditions.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1009 to identify the root cause.
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Quick Info
Category
Network
System
Powertrain Communication
Difficulty
Type
Manufacturer
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