What Does U1011 Mean?
Similar to U1010, indicating continued or intermittent loss of engine air intake data on the network. May be set by a different receiving module or during different operating conditions.
Common Causes
35%
Intermittent SCP network communication fault
30%
Intermittent PCM issue or connector problem
20%
Intermittent MAF/MAP sensor fault causing invalid data
15%
Poor ground connection affecting network stability
Diagnostic Steps
1
Step 1: Monitor air intake sensor readings in real-time while test driving to check for dropouts or invalid values
2
Step 2: Perform wiggle test on PCM harness and MAF/MAP sensor connectors while monitoring live data
3
Step 3: Check for water damage or contamination in air intake sensor that could cause intermittent operation
4
Step 4: Verify receiving module (check which module set the code) has good power and ground connections
5
Step 5: Clear codes and test drive to determine if fault is speed-dependent, temperature-dependent, or random
Estimated Repair Cost
$100 - $1,000
Parts + labor, varies by vehicle and location
Similar to U1010, indicating continued or intermittent loss of engine air intake data on the network. May be set by a different receiving module or during different operating conditions.
The most common cause of U1011 (SCP (J1850) Invalid or Missing Data for Engine Air Intake) is: Intermittent SCP network communication fault
Typical repair costs for U1011 range from $100 to $1,000, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Minimal safety impact. May cause slight drivability issues or transmission shift feel changes. Vehicle remains safe to operate.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1011 to identify the root cause.
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Quick Info
Category
Network
System
Engine Management Communication
Difficulty
Type
Manufacturer
Recommended Tools
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