What Does U1019 Mean?
Similar to U1018, this code indicates another module is not receiving valid throttle data via the SCP network. This typically accompanies U1018 when multiple modules rely on throttle position information.
Common Causes
30%
PCM/ECM not transmitting throttle data on network due to module fault
28%
Failed throttle position sensor providing invalid data to PCM
22%
Electronic throttle control system malfunction affecting data validity
15%
SCP network communication failure between PCM and receiving modules
5%
Poor sensor ground or reference voltage affecting TPS signal quality
Diagnostic Steps
1
Step 1: Verify throttle position sensor operation using live data on scan tool (should respond instantly to pedal input)
2
Step 2: Check for any powertrain DTCs related to throttle position or electronic throttle control
3
Step 3: Test 5-volt reference voltage at throttle sensor connector (should be 4.9-5.1V)
4
Step 4: Inspect throttle body for carbon buildup or binding that could affect sensor accuracy
5
Step 5: Monitor SCP network messages with advanced scan tool to verify PCM is broadcasting throttle data
Estimated Repair Cost
$120 - $900
Parts + labor, varies by vehicle and location
Similar to U1018, this code indicates another module is not receiving valid throttle data via the SCP network. This typically accompanies U1018 when multiple modules rely on throttle position information.
The most common cause of U1019 (SCP (J1850) Invalid or Missing Data for Throttle) is: PCM/ECM not transmitting throttle data on network due to module fault
Typical repair costs for U1019 range from $120 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Transmission shifting, cruise control, and traction control functions may be disabled or operate improperly. Vehicle will likely enter reduced power mode limiting acceleration.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1019 to identify the root cause.
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Quick Info
Category
Network
System
Engine Control / Network Communication
Difficulty
Type
Manufacturer
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