What Does U1071 Mean?
Similar to U1070, this code indicates invalid or missing engine sensor data on the SCP network. This may represent a different receiving module or specific sensor parameter set that is not being transmitted properly.
Common Causes
30%
PCM communication failure or internal fault
25%
Intermittent connection at SCP network terminals
20%
SCP bus circuit short to ground or power
15%
Failed engine sensors causing PCM to not broadcast valid data
10%
Network termination resistor failure
Diagnostic Steps
1
Step 1: Compare fault occurrence with U1070 to determine if same or different receiving module
2
Step 2: Monitor live data stream from PCM for all engine sensor parameters
3
Step 3: Wiggle test SCP bus wiring and connectors while monitoring for communication loss
4
Step 4: Check for other engine sensor DTCs that may prevent PCM from broadcasting data
5
Step 5: Measure SCP bus termination resistance (should be approximately 60-120 ohms)
Estimated Repair Cost
$150 - $1,400
Parts + labor, varies by vehicle and location
Similar to U1070, this code indicates invalid or missing engine sensor data on the SCP network. This may represent a different receiving module or specific sensor parameter set that is not being transmitted properly.
The most common cause of U1071 (SCP (J1850) Invalid or Missing Data for Engine Sensors) is: PCM communication failure or internal fault
Typical repair costs for U1071 range from $150 to $1,400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause erratic gauge operation and loss of critical engine information display. Engine performance may be affected if running in failsafe mode.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1071 to identify the root cause.
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Quick Info
Category
Network
System
Engine Management / Communication Network
Difficulty
Type
Manufacturer
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