U1010high severityNetwork
Control Module Internal Malfunction
on 1993-2001 Subaru Impreza 2.2L H4 · AWD
What this code means
A control module has detected an internal fault within its own processing or memory circuits, similar to generic P-code U0100. The affected module may operate erratically or stop responding.
Symptoms
- Warning lights illuminated
- System function loss or limp mode
- Module fails to communicate
Common causes
- Internal module hardware failure
- Corrupted module software or memory
- Power supply or ground fault to module
- Water or heat damage to module
Diagnostic steps
- Retrieve fault codes from affected module
- Verify module power and ground supply
- Check for available module software updates
- Replace or reprogram module if fault persists
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Other Network codes on this vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus